Polski · HTML · llms.txt · catalog.json
# AI Agents API Library
A curated, machine-readable encyclopedia of third-party APIs and MCP servers that AI agents can call on a user's behalf.
> This article is about services an AI agent can operate programmatically, not AI products used by humans through a web UI.
| AI Agents API Library |
|---|
| Type | API & MCP catalog |
| Entries | 336 |
| Categories | 29 |
| Official MCP servers | 234 |
| Languages | English, Polish |
| Format | JSON, Markdown, HTML, llms.txt |
| Last checked | 2026-10-19 |
| License | CC BY 4.0 (data), MIT (code) |
**AI Agents API Library** is an open, bilingual (English/Polish) catalog of **336 services** (each with a last-checked date) in **29 categories** that an autonomous AI agent — such as Claude, ChatGPT, Gemini or a custom LLM agent — can use **without a human in the loop**, after a one-time human step: registering an account and handing the agent an **API key**, an **OAuth token**, or a connection to an **MCP (Model Context Protocol) server**. Every entry records the documentation URL, the authentication method, the availability of an official or community MCP server, and the free tier. The list is not a directory of products with “AI” in their name; the criterion is agent operability, not branding.
## Contents
1. [Machine-readable access (for AI agents)](#machine-readable-access-for-ai-agents)
2. [Inclusion criteria](#inclusion-criteria)
3. [Legend](#legend)
4. [Web search](#web-search) (14) · [Web scraping and browser automation](#web-scraping-and-browser-automation) (19) · [Knowledge and research data](#knowledge-and-research-data) (19) · [Image generation and editing](#image-generation-and-editing) (10) · [Video generation and editing](#video-generation-and-editing) (14) · [Speech and audio](#speech-and-audio) (13) · [Music generation](#music-generation) (6) · [3D generation and assets](#3d-generation-and-assets) (6) · [Architecture, CAD and BIM](#architecture-cad-and-bim) (8) · [Diagrams and software architecture](#diagrams-and-software-architecture) (8) · [Design and UI](#design-and-ui) (6) · [Documents, OCR and presentations](#documents-ocr-and-presentations) (14) · [Translation and language](#translation-and-language) (6) · [Code execution sandboxes](#code-execution-sandboxes) (10) · [Developer platforms and DevOps](#developer-platforms-and-devops) (12) · [Cloud and hosting](#cloud-and-hosting) (11) · [Databases](#databases) (12) · [Vector search, memory and RAG](#vector-search-memory-and-rag) (9) · [Email, team chat and notifications](#email-team-chat-and-notifications) (10) · [SMS and messaging apps](#sms-and-messaging-apps) (10) · [Voice agents and telephony](#voice-agents-and-telephony) (9) · [Productivity and workspace](#productivity-and-workspace) (17) · [CRM, support and marketing](#crm-support-and-marketing) (8) · [Social media](#social-media) (10) · [Maps, geolocation and weather](#maps-geolocation-and-weather) (18) · [Finance, payments and market data](#finance-payments-and-market-data) (16) · [E-commerce](#e-commerce) (8) · [Automation and integration platforms](#automation-and-integration-platforms) (15) · [Model APIs and inference](#model-apis-and-inference) (18)
5. [Related directories and registries](#related-directories-and-registries)
6. [Contributing](#contributing)
7. [See also](#see-also)
8. [References](#references)
## Machine-readable access (for AI agents)
AI agents should not parse this page. Fetch one of these stable files instead:
| File | Raw URL |
|---|---|
| `llms.txt` — short index for LLMs, links to everything below | https://raw.githubusercontent.com/eater2/ai_agents_api_library/main/llms.txt |
| `llms-full.txt` — the whole catalog as compact plain text, one line per service | https://raw.githubusercontent.com/eater2/ai_agents_api_library/main/llms-full.txt |
| `catalog/all.json` — full catalog, one JSON array | https://raw.githubusercontent.com/eater2/ai_agents_api_library/main/catalog/all.json |
| `catalog/.json` — one file per category, for small context windows | https://raw.githubusercontent.com/eater2/ai_agents_api_library/main/catalog/ |
| `data/schema.json` — JSON Schema of an entry | https://raw.githubusercontent.com/eater2/ai_agents_api_library/main/data/schema.json |
Recommended agent workflow: (1) pick the category file, (2) filter by `auth` and `mcp.type`, (3) read `docs` (or `llms_txt` / `openapi` when present), (4) ask the user for the credential named in `auth_hint`.
### MCP server
The catalog is also an MCP server with four tools: `search_apis` (filters: `query`, `category`, `mcp` (official/remote/any), `no_auth`, `free_tier`, `no_card`, `auth`, `min_rating`, `min_reviews`; `sort` by fit, rating or review count; results carry a `reviews_summary` of praised and criticised aspects), `get_api`, `get_reviews` (user reviews with pros and cons) and `list_categories`. No key needed. Add it to your MCP client:
```json
{
"mcpServers": {
"ai-agents-api-library": {
"command": "npx",
"args": ["-y", "ai-agents-api-library"]
}
}
}
```
Claude Code: `claude mcp add ai-agents-api-library -- npx -y ai-agents-api-library`
No install: remote endpoint (Streamable HTTP, no key) `https://ai-agents-api-library.vercel.app/mcp`, e.g. `claude mcp add --transport http ai-agents-api-library https://ai-agents-api-library.vercel.app/mcp`. Listed in the [official MCP Registry](https://registry.modelcontextprotocol.io/v0/servers?search=ai-agents-api-library) as `io.github.eater2/ai-agents-api-library`.
### Claude skill and plugin
The skill tells Claude when to reach for the catalog and how to pick a service. The plugin bundles the skill with the MCP server:
- **Claude Code plugin** (skill + MCP server):
```
/plugin marketplace add eater2/ai_agents_api_library
/plugin install ai-agents-api-library@eater2
```
- **Skill only, Claude Code:** copy [`plugin/skills/ai-agents-api-library/`](plugin/skills/ai-agents-api-library/SKILL.md) to `~/.claude/skills/` (all projects) or `.claude/skills/` (one project).
- **Skill only, claude.ai / Claude Desktop:** download [the skill zip](https://ai-agents-api-library.vercel.app/ai-agents-api-library-skill.zip) and upload it under Settings → Capabilities → Skills.
## Inclusion criteria
- The service exposes a **public, self-serve** programmatic interface (REST, GraphQL, SDK) **or** an MCP server.
- A human needs to act **at most once** — sign up and create a key or approve OAuth. After that the agent works unattended.
- The interface is **documented** and **currently active** (links last checked on the date shown in the infobox).
- Consumer-only apps, waitlists, sales-gated enterprise products, agent frameworks and IDEs are **excluded** — they are agents or tools for building agents, not services an agent calls.
## Legend
- **MCP ✅** — official MCP server maintained by the vendor
- **MCP ◐** — community-maintained MCP server
- **MCP —** — no MCP server known; use the REST API
- **🆓** — free tier or free usage without payment
- **★ (date)** — proof under the service name: SourceForge rating and review count, GitHub stars, GitHub issues fixed and days to fix, Smithery uses — linked, with the date fetched
*Ratings and usage (★) fetched: 2026-10-26 11:05 UTC.*
## Web search
*Search engines and answer APIs that return fresh web results, snippets or full page content in agent-friendly formats.* — 14 services. JSON: [`catalog/web-search.json`](catalog/web-search.json)
| Service | What an agent can do | Auth | MCP | Free tier | Docs |
|---|---|---|:-:|---|---|
| [Brave Search API](https://brave.com/search/api/)
⭐⭐⭐⭐⭐ **4.5**/5 · [2 reviews](https://sourceforge.net/software/product/Brave-Search/ "SourceForge")
[](https://github.com/brave/brave-search-mcp-server) [](https://github.com/brave/brave-search-mcp-server/issues) [](https://smithery.ai/servers/brave) | Lets an agent query Brave's independent web/image/video/news search index and get cited, LLM-ready results. | API key | [✅](https://github.com/brave/brave-search-mcp-server) | 🆓 $5 free monthly credits (~1,000 queries on Search plan); credit card required at signup as anti-fraud measure | [docs](https://api-dashboard.search.brave.com/app/documentation/web-search/get-started) |
| [Exa](https://exa.ai)
⭐⭐⭐⭐⭐ **5.0**/5 · [1 review](https://sourceforge.net/software/product/Exa/ "SourceForge")
[](https://www.npmjs.com/package/exa-js) [](https://pypi.org/project/exa-py/) [](https://github.com/exa-labs/exa-js/issues) | Lets an agent run neural or keyword web search, retrieve page contents, and find similar links via Exa's API. | API key | [✅](https://mcp.exa.ai/mcp) | 🆓 free tier: $10 free credits/month (~1,400 searches), no payment method required | [docs](https://exa.ai/docs/search/quickstart) |
| [Jina AI Search / Reader](https://jina.ai) | Search the web or convert any URL into clean LLM-ready markdown via simple HTTP GET requests. | API key | [✅](https://mcp.jina.ai/v1) | 🆓 No key needed for Reader only: 20 RPM (Search is blocked without a key); free API key gives Reader 500 RPM / Search 100 RPM plus 10M free tokens one-time on signup | [docs](https://docs.jina.ai) |
| [Kagi Search API](https://kagi.com)
⭐⭐⭐⭐⭐ **5.0**/5 · [1 review](https://sourceforge.net/software/product/Kagi/ "SourceForge")
[](https://github.com/kagisearch/kagimcp) [](https://github.com/kagisearch/kagimcp/issues) | Run programmatic, ad-free premium web/news/image/video searches and extract page markdown via a paid REST API. | API key | [✅](https://github.com/kagisearch/kagimcp) | no free tier: pay-per-use, $12 per 1,000 search requests, invoiced monthly or at $100 usage, whichever first | [docs](https://help.kagi.com/kagi/api/overview.html) |
| [Linkup](https://www.linkup.so)
[](https://www.npmjs.com/package/linkup-sdk) [](https://pypi.org/project/linkup-sdk/) [](https://smithery.ai/servers/LinkupPlatform/linkup-mcp-server) | Lets an agent search, fetch pages, or run deep multi-source research via Linkup's Search/Fetch/Research API endpoints. | API key | [✅](https://mcp.linkup.so/mcp) | 🆓 $20 free credits/month for new accounts signing up with a professional email | [docs](https://docs.linkup.so/pages/documentation/endpoints/search/reference) |
| [Mojeek Search API](https://www.mojeek.com/services/search/web-search-api/)
⭐⭐⭐⭐⭐ **5.0**/5 · [1 review](https://sourceforge.net/software/product/Mojeek/ "SourceForge") | Query Mojeek's independent web index for titles, URLs and snippets in JSON or XML, with country/language boosting. | API key | — | limited-query free trial available on request; paid plans from £2 CPM (Startup, 5 req/s, 100k/day cap) | [docs](https://www.mojeek.com/support/api/search/) |
| [Parallel Web Systems Search API](https://parallel.ai)
[](https://www.npmjs.com/package/parallel-web) [](https://pypi.org/project/parallel-web/) | Lets an agent run Parallel's low-latency Search API for web research, content extraction, and entity discovery. | API key | [✅](https://search.parallel.ai/mcp) | 🆓 free: 5,000 requests/month across APIs, plus up to $80 signup credit and $5/month free credits | [docs](https://docs.parallel.ai) |
| [Perplexity Sonar / Search API](https://docs.perplexity.ai)
[](https://www.npmjs.com/package/@perplexity-ai/perplexity_ai) [](https://pypi.org/project/perplexityai/) [](https://github.com/perplexityai/perplexity-py/issues) | Lets an agent call Perplexity's Search API or MCP tools (search/ask/research/reason) for real-time grounded web answers. | API key / OAuth | [✅](https://api.perplexity.ai/mcp) | Paid only: no confirmed free tier; pay-as-you-go, Search API billed at $5 per 1,000 requests ($1 per 1,000 for the fast search variant) | [docs](https://docs.perplexity.ai/api-reference/search-post) |
| [SearchApi.io](https://www.searchapi.io) | Fetch structured JSON results from Google, Bing, YouTube, Amazon, TikTok and 50+ other search engines via one REST API. | API key | [✅](https://www.searchapi.io/mcp) | Trial: 100 free requests one-time on signup, no credit card required; then Developer plan $40/mo for 10,000 searches | [docs](https://www.searchapi.io/docs/google) |
| [SearXNG (self-hosted JSON API)](https://docs.searxng.org)
[](https://github.com/ihor-sokoliuk/mcp-searxng) [](https://github.com/ihor-sokoliuk/mcp-searxng/issues) | Query a self-hosted SearXNG metasearch instance's JSON API to aggregate results from many search engines at once. | none | [◐](https://github.com/ihor-sokoliuk/mcp-searxng) | 🆓 free, no key (self-hosted; you run and pay for the instance yourself) | [docs](https://docs.searxng.org/dev/search_api.html) |
| [SerpApi](https://serpapi.com)
[](https://www.npmjs.com/package/serpapi) [](https://pypi.org/project/serpapi/) [](https://stackoverflow.com/questions/tagged/serpapi) [](https://github.com/serpapi/serpapi-javascript/issues) | Lets an agent scrape structured JSON results from Google and 20+ other search engines via SerpApi's REST API. | API key | [✅](https://mcp.serpapi.com/mcp) | 🆓 free plan: 250 searches/month, 50 requests/hour throughput | [docs](https://serpapi.com/search-api) |
| [Serper](https://serper.dev)
[](https://github.com/marcopesani/mcp-server-serper) | Lets an agent fetch fast, low-cost Google search results (web, images, news, maps, shopping) via Serper's REST API. | API key | [◐](https://github.com/marcopesani/mcp-server-serper) | Trial: 2,500 free queries one-time on signup, no credit card required; then prepaid query packages | [docs](https://serper.dev) |
| [Tavily](https://tavily.com)
[](https://www.npmjs.com/package/@tavily/core) [](https://pypi.org/project/tavily-python/) [](https://github.com/tavily-ai/tavily-python/issues) [](https://smithery.ai/servers/Tavily) | Lets an agent call Tavily's search API or MCP server to run web searches and get AI-ready summarized results. | API key | [✅](https://mcp.tavily.com/mcp) | 🆓 free tier: 1,000 API credits/month, no credit card required | [docs](https://docs.tavily.com/documentation/api-reference/endpoint/search) |
| [You.com API](https://you.com/api)
⭐⭐⭐⭐⭐ **5.0**/5 · [1 review](https://sourceforge.net/software/product/You.com/ "SourceForge") | Lets an agent call You.com's Search/Answer/Research API or MCP server for LLM-ready web search and grounded answers. | API key | [✅](https://api.you.com/mcp) | 🆓 Free: 100 queries/day with no API key or sign-up through the MCP free profile (search and discover only); new API-key accounts also get $100 in one-time credit | [docs](https://you.com/docs/api-reference/search) |
## Web scraping and browser automation
*Crawl, scrape and convert pages to Markdown/JSON, or drive a remote headless browser (clicks, forms, logins).* — 19 services. JSON: [`catalog/web-scraping-browser.json`](catalog/web-scraping-browser.json)
| Service | What an agent can do | Auth | MCP | Free tier | Docs |
|---|---|---|:-:|---|---|
| [Anchor Browser](https://anchorbrowser.io)
⭐⭐⭐⭐⭐ **5.0**/5 · [1 review](https://sourceforge.net/software/product/Anchor-Browser/ "SourceForge")
[](https://www.npmjs.com/package/anchorbrowser) [](https://pypi.org/project/anchorbrowser/) | Provision authenticated cloud browser sessions and turn any website into callable MCP tools for agents. | API key | [✅](https://api.anchorbrowser.io/mcp) | 🆓 $5 free credits/mo, no card required | [docs](https://docs.anchorbrowser.io) |
| [Apify](https://apify.com)
⭐⭐⭐⭐⭐ **4.8**/5 · [1,800 reviews](https://sourceforge.net/software/product/Apify/ "SourceForge")
[](https://www.npmjs.com/package/apify-client) [](https://pypi.org/project/apify-client/) [](https://stackoverflow.com/questions/tagged/apify) [](https://github.com/apify/apify-client-js/issues) [](https://smithery.ai/servers/apify) | Run web scraping/automation 'Actors' from a marketplace of thousands, and manage datasets, via REST API or MCP server. | API key / OAuth | [✅](https://docs.apify.com/platform/integrations/mcp) | 🆓 free plan: $5/mo platform usage credit, no card required | [docs](https://docs.apify.com/api) |
| [Bright Data](https://brightdata.com)
⭐⭐⭐⭐⭐ **4.5**/5 · [1 review](https://sourceforge.net/software/product/Bright-Data/ "SourceForge")
[](https://www.npmjs.com/package/@brightdata/sdk) [](https://pypi.org/project/brightdata-sdk/) [](https://github.com/brightdata/brightdata-mcp) [](https://github.com/brightdata/brightdata-mcp/issues) [](https://smithery.ai/servers/brightdata) | Access Web Unlocker, SERP API, Scraping Browser, and structured datasets via REST API or MCP to pull web data at scale. | API key | [✅](https://github.com/brightdata/brightdata-mcp) | 🆓 Free tier: 5,000 requests/month via the MCP server (renews on the 1st, no card required); other products pay-as-you-go | [docs](https://docs.brightdata.com/introduction) |
| [Browse AI API](https://www.browse.ai) | Trigger pre-built or custom 'robots' to extract and monitor web data via REST API, returning structured JSON. | API key | — | 🆓 free forever plan: 50 credits/mo, no card required | [docs](https://docs.browse.ai/api/v2) |
| [Browser Use Cloud API](https://browser-use.com)
⭐⭐⭐⭐⭐ **5.0**/5 · [1 review](https://sourceforge.net/software/product/Browser-Use/ "SourceForge")
[](https://www.npmjs.com/package/browser-use-sdk) [](https://pypi.org/project/browser-use-sdk/) | Launch cloud browser sessions and run AI browser-automation agent tasks via REST API or Python/TypeScript SDK. | API key | [✅](https://api.browser-use.com/v3/mcp) | $15 one-time signup credit for new accounts (Google/GitHub/Microsoft); paid usage afterward | [docs](https://docs.browser-use.com) |
| [Browserbase (+ Stagehand)](https://www.browserbase.com)
⭐⭐⭐ **3.0**/5 · [2 reviews](https://sourceforge.net/software/product/Browserbase/ "SourceForge")
[](https://www.npmjs.com/package/@browserbasehq/sdk) [](https://www.npmjs.com/package/@browserbasehq/stagehand) [](https://pypi.org/project/browserbase/) [](https://pypi.org/project/stagehand/) [](https://github.com/browserbase/stagehand/issues) [](https://smithery.ai/servers/browserbase) | Run and control cloud headless browsers programmatically, with Stagehand adding natural-language page actions. | API key | [✅](https://mcp.browserbase.com/mcp) | 🆓 Free tier: 1 browser hour/month, 3 concurrent browsers, 15 min/session, no card required | [docs](https://docs.browserbase.com) |
| [CurlShot](https://curlshot.com) | Lets an agent capture a public web page in a real browser as PNG, JPEG, WebP or PDF (full page, device presets, dark mode, ad blocking) or record it scrolling as MP4, WebM or GIF. | API key | [✅](https://curlshot.com/api/mcp) | 🆓 free plan: 100 screenshots/month, no card required; paid from $19/mo (3,000 screenshots) | [docs](https://curlshot.com/docs) |
| [Diffbot](https://www.diffbot.com)
[](https://stackoverflow.com/questions/tagged/diffbot) | Automatically extract structured data (articles, products, people) from any URL via REST API, no custom parsing rules needed. | API key | — | 🆓 free plan: 10,000 credits/mo, no card required (5 req/min limit) | [docs](https://www.diffbot.com/docs/extract/) |
| [Firecrawl](https://www.firecrawl.dev)
⭐⭐⭐⭐⭐ **5.0**/5 · [1 review](https://sourceforge.net/software/product/Firecrawl/ "SourceForge")
[](https://www.npmjs.com/package/@mendable/firecrawl-js) [](https://pypi.org/project/firecrawl-py/) [](https://stackoverflow.com/questions/tagged/firecrawl) [](https://github.com/firecrawl/firecrawl/issues) | Scrape, crawl, and extract structured data from any website via a single REST API call. | API key | [✅](https://mcp.firecrawl.dev/v2/mcp) | 🆓 free tier: 1,000 credits/mo, no card required | [docs](https://docs.firecrawl.dev) |
| [Hyperbrowser](https://www.hyperbrowser.ai)
[](https://www.npmjs.com/package/@hyperbrowser/sdk) [](https://pypi.org/project/hyperbrowser/) [](https://github.com/hyperbrowserai/mcp) | Spin up cloud browsers and call scrape, crawl, and structured-extract endpoints via REST API or MCP server. | API key | [✅](https://github.com/hyperbrowserai/mcp) | 🆓 Free: Free plan with 5,000 credits (1 credit = $0.001), 1 concurrent browser, 7-day data retention; no credit card required | [docs](https://www.hyperbrowser.ai/docs) |
| [Oxylabs](https://oxylabs.io)
⭐⭐⭐⭐ **4.2**/5 · [1,216 reviews](https://sourceforge.net/software/product/Oxylabs/ "SourceForge")
[](https://pypi.org/project/oxylabs/) | Fetch web pages, search-engine results, and e-commerce data at scale via REST API with built-in proxy/unblocking infrastructure. | API key | [✅](https://mcp.oxylabs.io/mcp) | Trial: Web Scraper API free trial with up to 2,000 results one-time, no card required | [docs](https://developers.oxylabs.io) |
| [Playwright MCP (Microsoft)](https://github.com/microsoft/playwright-mcp)
[](https://www.npmjs.com/package/@playwright/mcp) [](https://github.com/microsoft/playwright-mcp) [](https://github.com/microsoft/playwright-mcp/issues) | Official Microsoft MCP server giving agents structured browser control (click, type, navigate) via Playwright's accessibility tree. | none | [✅](https://github.com/microsoft/playwright-mcp) | 🆓 free, open source, no key | [docs](https://github.com/microsoft/playwright-mcp#readme) |
| [ScrapeGraphAI API](https://scrapegraphai.com)
[](https://www.npmjs.com/package/scrapegraph-js) [](https://pypi.org/project/scrapegraph-py/) [](https://github.com/ScrapeGraphAI/scrapegraph-py/issues) | Use AI-driven prompts to scrape and extract structured data from webpages via REST API or Python/JS SDK. | API key | [✅](https://mcp.scrapegraphai.com/mcp) | Trial: 500 API credits one-time on the Free plan (10 requests/min), no card required | [docs](https://docs.scrapegraphai.com/introduction) |
| [ScraperAPI](https://www.scraperapi.com) | Scrape any webpage with automatic proxy rotation, CAPTCHA handling, and JS rendering via a single REST API call. | API key | [✅](https://mcp.scraperapi.com/mcp) | 🆓 Free: free plan with 1,000 API credits per month (max 5 concurrent connections); new accounts start with a 7-day trial of 5,000 one-time credits, no card required | [docs](https://docs.scraperapi.com) |
| [Scrapfly](https://scrapfly.io)
[](https://www.npmjs.com/package/scrapfly-sdk) [](https://pypi.org/project/scrapfly-sdk/) [](https://github.com/scrapfly/python-scrapfly/issues) | Scrape webpages, run cloud browsers, and capture screenshots via REST API or hosted MCP server with anti-bot bypass. | API key / OAuth | [✅](https://scrapfly.io/products/mcp-cloud) | 🆓 1,000 free credits/mo, no card required, no time limit | [docs](https://scrapfly.io/docs) |
| [ScrapingBee](https://www.scrapingbee.com)
[](https://www.npmjs.com/package/scrapingbee) [](https://pypi.org/project/scrapingbee/) | Scrape any webpage with JS rendering, proxy rotation, and screenshot capture via a single REST API call. | API key | [✅](https://mcp.scrapingbee.com/mcp) | Trial: 1,000 free API credits one-time on signup, no card required; then Hobby plan $19/mo for 75,000 credits | [docs](https://www.scrapingbee.com/documentation/) |
| [Spider.cloud](https://spider.cloud)
[](https://www.npmjs.com/package/@spider-cloud/spider-client) [](https://pypi.org/project/spider-client/) [](https://github.com/spider-rs/spider-clients/issues) | Crawl and scrape websites at scale, returning JSON/XML/CSV, via REST API, CLI, or MCP server. | API key | [✅](https://mcp.spider.cloud/mcp) | 🆓 Free: keyless /scrape endpoint, rate-limited (quota not published); other endpoints return 402 without a key | [docs](https://spider.cloud/docs/api) |
| [Steel](https://steel.dev)
[](https://www.npmjs.com/package/steel-sdk) [](https://pypi.org/project/steel-sdk/) [](https://github.com/steel-dev/steel-mcp-server) [](https://github.com/steel-dev/steel-mcp-server/issues) | Create managed cloud browser sessions with stealth proxies and CAPTCHA solving, controllable via REST API or Playwright/Puppeteer. | API key | [✅](https://github.com/steel-dev/steel-mcp-server) | Trial: Launch plan is $0 + usage with $30 one-time usage credits valid 90 days (10 concurrent sessions, 60 requests/min); no Hobby plan | [docs](https://docs.steel.dev) |
| [Zyte API](https://www.zyte.com)
[](https://pypi.org/project/zyte-api/) [](https://stackoverflow.com/questions/tagged/zyte) [](https://github.com/zytedata/python-zyte-api/issues) | Fetch and auto-extract web pages (HTML, browser rendering, product/article data) via one HTTP API with ban avoidance. | API key | — | Trial: $5 free credit one-time on signup, valid 30 days, no subscription needed; then pay-as-you-go or a monthly commitment | [docs](https://docs.zyte.com/zyte-api/usage/http.html) |
## Knowledge and research data
*Encyclopedias, academic papers, news, computational knowledge and up-to-date library documentation.* — 19 services. JSON: [`catalog/knowledge-research.json`](catalog/knowledge-research.json)
| Service | What an agent can do | Auth | MCP | Free tier | Docs |
|---|---|---|:-:|---|---|
| [arXiv API](https://info.arxiv.org/help/api/)
[](https://github.com/blazickjp/arxiv-mcp-server) [](https://github.com/blazickjp/arxiv-mcp-server/issues) [](https://smithery.ai/servers/arxiv) | Search arXiv preprints by keyword, author, category or ID and retrieve metadata, abstracts and PDF links. | none | [◐](https://github.com/blazickjp/arxiv-mcp-server) | 🆓 free, no key | [docs](https://info.arxiv.org/help/api/user-manual.html) |
| [Congress.gov API](https://www.congress.gov/)
[](https://github.com/cyanheads/congressgov-mcp-server) [](https://github.com/cyanheads/congressgov-mcp-server/issues) | Lets an agent look up U.S. bills, amendments, votes, members, committees, nominations and Congressional Record data from the Library of Congress. | API key | [◐](https://github.com/cyanheads/congressgov-mcp-server) | 🆓 Free: government API, key issued instantly by email; 5,000 requests/hour. | [docs](https://api.congress.gov/) |
| [Context7 (library docs for agents)](https://context7.com)
[](https://www.npmjs.com/package/@upstash/context7-sdk) [](https://github.com/upstash/context7/issues) [](https://smithery.ai/servers/upstash/context7-mcp) | Fetch up-to-date, version-specific library documentation and code examples into a coding agent's context via MCP or REST. | API key | [✅](https://mcp.context7.com/mcp) | 🆓 Free: 1,000 API calls per month with a free API key (low limits without key); Pro $10/seat/month | [docs](https://context7.com/docs/api-guide) |
| [Court Rules](https://www.courtrules.app/) | Lets an agent read U.S. federal and local court rules, judge standing orders, court holidays and filing deadlines, and compute a filing deadline for any federal district. | API key | [✅](https://mcp.courtrules.app/mcp) | 🆓 free tier: Developer plan at $0/month with full API access, rate limited to 10 requests/minute | [docs](https://www.courtrules.app/api) |
| [Crossref REST API](https://www.crossref.org/documentation/retrieve-metadata/rest-api/)
[](https://github.com/afrise/academic-search-mcp-server) | Look up and search scholarly metadata such as DOIs, references, authors, funders and licenses across Crossref-registered works. | none | [◐](https://github.com/afrise/academic-search-mcp-server) | 🆓 free, no key | [docs](https://www.crossref.org/documentation/retrieve-metadata/rest-api/) |
| [DC Hub](https://dchub.cloud/) | Lets an agent check where data centers can get grid power, using the Data Center Power Index (DCPI) daily score across 300+ markets, plus grid, interconnection-queue, fiber and site data. | API key | [✅](https://dchub.cloud/mcp) | 🆓 free tier: keyless previews; a free self-serve key adds 2 full answers per tool per day, and 50 calls/day once an email is added | [docs](https://dchub.cloud/api-docs) |
| [GDELT API](https://www.gdeltproject.org)
[](https://github.com/cyanheads/gdelt-mcp-server) [](https://github.com/cyanheads/gdelt-mcp-server/issues) | Full-text search global news in about 65 languages and analyze coverage volume, tone and geography in near real time. | none | [◐](https://github.com/cyanheads/gdelt-mcp-server) | 🆓 free, no key | [docs](https://blog.gdeltproject.org/gdelt-doc-2-0-api-debuts/) |
| [Gitingest API](https://gitingest.com)
[](https://pypi.org/project/gitingest/) [](https://github.com/narumiruna/gitingest-mcp) [](https://github.com/coderamp-labs/gitingest/issues) | Lets an agent turn any public Git repository into a single text digest (summary, directory tree and file contents) sized for an LLM prompt. | none | [◐](https://github.com/narumiruna/gitingest-mcp) | 🆓 No key needed: free public service; hosted API limited to 10 requests/minute per endpoint (the web UI also has rate limiting and CAPTCHA protection). | [docs](https://gitingest.com/llms.txt) |
| [Hacker News API](https://github.com/HackerNews/API)
[](https://stackoverflow.com/questions/tagged/hacker-news-api) [](https://github.com/HackerNews/API) [](https://github.com/devrelopers/hackernews-mcp) | Read Hacker News stories, comments, jobs, polls, user profiles and front-page rankings as real-time JSON. | none | [◐](https://github.com/devrelopers/hackernews-mcp) | 🆓 free, no key | [docs](https://github.com/HackerNews/API) |
| [Internet Archive Open Library API](https://openlibrary.org/)
[](https://github.com/8enSmith/mcp-open-library) | Lets an agent search books, authors and subjects, fetch work/edition data by ISBN or OLID, search inside book texts and get cover images. | none | [◐](https://github.com/8enSmith/mcp-open-library) | 🆓 No key; free and open: 1 request/second anonymous, 3 requests/second with an identifying User-Agent. | [docs](https://openlibrary.org/developers/api) |
| [New York Times APIs](https://developer.nytimes.com/)
[](https://github.com/jeffmm/nytimes-mcp) | Lets an agent search NYT articles back to 1851, read top stories, most-popular lists, the Times Wire feed and bestseller lists. | API key | [◐](https://github.com/jeffmm/nytimes-mcp) | 🆓 Free: all public APIs are free; 500 requests/day and 5 requests/minute per API. | [docs](https://developer.nytimes.com/apis) |
| [NewsAPI](https://newsapi.org)
[](https://stackoverflow.com/questions/tagged/newsapi) [](https://github.com/matteoantoci/mcp-newsapi) | Search and retrieve current and historical news articles and top headlines from thousands of sources worldwide. | API key | [◐](https://github.com/matteoantoci/mcp-newsapi) | 🆓 free Developer plan: 100 req/day, dev/test only, 24h article delay | [docs](https://newsapi.org/docs) |
| [OpenAlex API](https://openalex.org)
[](https://github.com/benedict2310/Scientific-Papers-MCP) | Query an open catalog of scholarly works, authors, institutions, sources and topics, including citation data, via REST. | API key | [◐](https://github.com/benedict2310/Scientific-Papers-MCP) | 🆓 free: $1 of API usage/day without payment method; free key raises daily budget 10x | [docs](https://help.openalex.org/api/) |
| [PubMed E-utilities (NCBI)](https://www.ncbi.nlm.nih.gov/books/NBK25501/)
[](https://stackoverflow.com/questions/tagged/pubmed) [](https://github.com/openags/paper-search-mcp) [](https://github.com/openags/paper-search-mcp/issues) | Search, fetch, summarize and cross-link biomedical literature records from PubMed, PMC and other Entrez databases. | none | [◐](https://github.com/openags/paper-search-mcp) | 🆓 free; 3 req/s without key, 10 req/s with free NCBI API key | [docs](https://www.ncbi.nlm.nih.gov/books/NBK25501/) |
| [Semantic Scholar API](https://www.semanticscholar.org/product/api)
[](https://github.com/zongmin-yu/semantic-scholar-fastmcp-mcp-server) | Search papers, authors and citation graphs, and get paper recommendations from Semantic Scholar's academic corpus. | API key | [◐](https://github.com/zongmin-yu/semantic-scholar-fastmcp-mcp-server) | 🆓 free; no key (shared, throttled pool) or free API key on request | [docs](https://api.semanticscholar.org/api-docs/) |
| [SemanticHub](https://semantichub.app) | Lets an agent set up monitoring of news sources, read clustered articles and generated texts, and manage goals and workflows in SemanticHub. | API key / OAuth | [✅](https://mcp.semantichub.app/mcp) | 🆓 free forever, no card: 1 goal, 100 sources to watch, 5 workflow nodes, articles kept 7 days; paid plans from $29/month | [docs](https://semantichub.app/docs) |
| [Wikidata](https://www.wikidata.org)
[](https://stackoverflow.com/questions/tagged/wikidata) | Query the Wikidata knowledge graph of entities, facts and relations via SPARQL, the REST API or MCP. | none | [✅](https://wd-mcp.wmcloud.org/mcp) | 🆓 free, no key | [docs](https://www.wikidata.org/wiki/Wikidata:Data_access) |
| [Wikipedia / Wikimedia API](https://www.mediawiki.org/wiki/Wikimedia_APIs)
[](https://stackoverflow.com/questions/tagged/mediawiki-api) [](https://github.com/Rudra-ravi/wikipedia-mcp) [](https://github.com/Rudra-ravi/wikipedia-mcp/issues) | Search, read and summarize Wikipedia and other Wikimedia content and metadata via REST and Action APIs. | none | [◐](https://github.com/Rudra-ravi/wikipedia-mcp) | 🆓 free, no key (rate-limited) | [docs](https://www.mediawiki.org/wiki/Wikimedia_APIs) |
| [Wolfram\|Alpha API](https://products.wolframalpha.com/api)
[](https://stackoverflow.com/questions/tagged/wolframalpha) | Get computed answers, structured data and step-by-step results for math, science and factual queries. | API key | [✅](https://agenttools.wolfram.com/mcp) | 🆓 Free: non-commercial developer AppID with up to 2,000 calls/month; paid for commercial use | [docs](https://products.wolframalpha.com/llm-api/documentation) |
## Image generation and editing
*Text-to-image, image editing, inpainting, upscaling and background removal.* — 10 services. JSON: [`catalog/image-generation.json`](catalog/image-generation.json)
| Service | What an agent can do | Auth | MCP | Free tier | Docs |
|---|---|---|:-:|---|---|
| [Adobe Firefly Services API](https://developer.adobe.com/firefly-services/)
[](https://www.npmjs.com/package/@adobe/firefly-apis) [](https://github.com/Focus-GTS/firefly-services-mcp) | Generate and edit images and manage creative assets programmatically via Adobe's Firefly REST APIs. | OAuth 2.0 | [◐](https://github.com/Focus-GTS/firefly-services-mcp) | check pricing; requires Adobe Developer Console project and Firefly Services entitlement | [docs](https://developer.adobe.com/firefly-services/docs/firefly-api/) |
| [Black Forest Labs FLUX API](https://bfl.ai) | Generate, edit, and vary FLUX model images from text prompts via REST or the official OAuth MCP server. | API key | [✅](https://mcp.bfl.ai) | paid only, no free tier (FLUX Schnell weights are open for self-hosting) | [docs](https://docs.bfl.ai/quick_start/introduction) |
| [Freepik API](https://www.freepik.com/api) | Generate and edit images, and generate video, music and sound effects via REST API, plus access the Freepik stock asset library. | API key | [✅](https://mcp.magnific.com) | 🆓 free tier: ~5 EUR of free API credits, then pay-as-you-go | [docs](https://docs.magnific.com) |
| [Google Gemini / Imagen image API](https://ai.google.dev/gemini-api/docs/image-generation)
[](https://apps.apple.com/us/app/google-gemini/id6477489729) [](https://www.npmjs.com/package/@google/genai) [](https://pypi.org/project/google-genai/) [](https://stackoverflow.com/questions/tagged/google-gemini) [](https://github.com/googleapis/python-genai/issues) | Generate and multi-turn edit images from text via REST (Nano Banana/Imagen models), up to 4K with reference-image support. | API key | — | Paid only: pricing page lists Free Tier 'Not available' for all Gemini image models (Nano Banana family); usage-billed | [docs](https://ai.google.dev/gemini-api/docs/image-generation) |
| [Ideogram API](https://ideogram.ai) | Generate, edit, remix, upscale, and describe images via REST or an official OAuth MCP server, strong at in-image text. | API key | [✅](https://mcp.ideogram.ai/mcp) | Paid only: no free API credits (web app has 10 slow credits/week); API is pay-per-image from prepaid credit (min one-time purchase $1, min auto top-up target $10) | [docs](https://developer.ideogram.ai/ideogram-api/api-setup) |
| [Leonardo.Ai API](https://leonardo.ai)
⭐⭐⭐⭐⭐ **5.0**/5 · [1 review](https://sourceforge.net/software/product/Leonardo.ai/ "SourceForge")
[](https://www.npmjs.com/package/@leonardo-ai/sdk) [](https://pypi.org/project/leonardo-ai-sdk/) [](https://github.com/Leonardo-Interactive/leonardo-ts-sdk/issues) | Generate images and videos from text via REST or the official MCP server, with model selection and job status polling. | API key | [✅](https://mcp.leonardo.ai/v1/mcp) | Paid only: Pay-As-You-Go API credit (USD balance) via manual or auto top-ups; API access is separate from free/web app plans | [docs](https://docs.leonardo.ai/docs/getting-started) |
| [OpenAI Images API (gpt-image)](https://developers.openai.com/api/docs/guides/image-generation)
⭐⭐⭐⭐⭐ **5.0**/5 · [3 reviews](https://sourceforge.net/software/product/OpenAI/ "SourceForge")
[](https://apps.apple.com/us/app/chatgpt/id6448311069) [](https://www.npmjs.com/package/openai) [](https://pypi.org/project/openai/) [](https://stackoverflow.com/questions/tagged/openai-api) [](https://github.com/SureScaleAI/openai-gpt-image-mcp) [](https://github.com/openai/openai-python/issues) | Generate, edit, and iteratively refine images from text prompts via REST, with mask-based inpainting and streaming previews. | API key | [◐](https://github.com/SureScaleAI/openai-gpt-image-mcp) | paid only; no free image credits, usage-based billing | [docs](https://developers.openai.com/api/docs/guides/image-generation) |
| [Recraft API](https://www.recraft.ai) | Generate, edit, upscale, and vectorize images via REST API using Recraft's proprietary models. | API key | [✅](https://mcp.recraft.ai/mcp) | paid only; pay-per-image (from $0.007/image on V4.1 Flash), no confirmed free credits | [docs](https://www.recraft.ai/docs/api-reference/getting-started) |
| [remove.bg API](https://www.remove.bg) | Remove image backgrounds programmatically via a simple REST API with JSON or multipart uploads. | API key | — | 🆓 Free: first 50 API calls per month, then paid credits | [docs](https://www.remove.bg/api) |
| [Stability AI Platform API](https://platform.stability.ai)
[](https://pypi.org/project/stability-sdk/) [](https://github.com/tadasant/mcp-server-stability-ai) [](https://github.com/tadasant/mcp-server-stability-ai/issues) | Generate, upscale, and edit images via REST (Stable Image Ultra/Core/SD3 models) using simple credit-based billing. | API key | [◐](https://github.com/tadasant/mcp-server-stability-ai) | 25 free credits on signup, then pay-as-you-go | [docs](https://platform.stability.ai/docs/api-reference) |
## Video generation and editing
*Text/image-to-video models, talking avatars, programmatic video rendering and video hosting.* — 14 services. JSON: [`catalog/video-generation.json`](catalog/video-generation.json)
| Service | What an agent can do | Auth | MCP | Free tier | Docs |
|---|---|---|:-:|---|---|
| [Akool API](https://akool.com) | Generate face-swap, talking avatar, and video-translation content programmatically via REST API. | API key | — | Paid only for API: API access starts at the Pro Max plan; the Free plan is web-app only with full-screen watermark | [docs](https://docs.akool.com) |
| [Creatomate API](https://creatomate.com)
[](https://www.npmjs.com/package/creatomate) | Programmatically generate and render videos/images from templates via REST API. | API key | [✅](https://api.creatomate.com/mcp) | Trial: full-featured trial with 50 credits one-time on signup, no credit card required; then Essential plan with 2,000 credits/mo | [docs](https://creatomate.com/docs/api/rest-api/authentication) |
| [D-ID API](https://www.d-id.com) | Animate photos into talking-head videos with lip-sync from text or audio via REST API. | API key | [✅](https://docs.d-id.com/mcp) | Trial: 14 days with 3 minutes of video credits, then paid plans only (API price per minute not published in machine-readable form) | [docs](https://docs.d-id.com) |
| [Google Veo (Gemini API / Vertex AI)](https://ai.google.dev/gemini-api/docs/video)
[](https://www.npmjs.com/package/@google/genai) [](https://pypi.org/project/google-genai/) [](https://github.com/GoogleCloudPlatform/genmedia-creative-studio) [](https://github.com/googleapis/python-genai/issues) | Generate video from text or image prompts via Gemini API (api key) or Vertex AI (cloud IAM), incl. Veo 3.1 scene extension. | API key / OAuth | [✅](https://github.com/GoogleCloudPlatform/genmedia-creative-studio/tree/main/experiments/mcp-genmedia) | no free tier for video; Veo generation requires a paid Gemini API / Vertex AI billing account | [docs](https://ai.google.dev/gemini-api/docs/video) |
| [HeyGen API](https://www.heygen.com)
⭐⭐ **2.0**/5 · [1 review](https://sourceforge.net/software/product/HeyGen/ "SourceForge") | Create AI avatar/talking-head videos from text or audio, manage avatars and voices, via REST API. | API key / OAuth | [✅](https://mcp.heygen.com/mcp/v1/) | no free API credits since Feb 2026; pay-as-you-go from $5, $0.50-$0.99/credit. Free plan (3 videos/mo) exists but is for the web app, not standalone API. | [docs](https://developers.heygen.com) |
| [Klap API](https://klap.app) | Automatically turn long videos into short clips with captions and reframing via REST API. | API key | — | Paid only; usage-based, billed monthly per operation (Generate Short $0.32, Video Input $0.44, Export $0.48); no free API credits stated | [docs](https://docs.klap.app) |
| [Kling AI API](https://klingai.com)
[](https://github.com/199-mcp/mcp-kling) | Generate text-to-video, image-to-video, lip-sync and video effects via REST API with a Bearer API key. | API key | [◐](https://github.com/199-mcp/mcp-kling) | Paid only; prepaid credit packages from $0.14/unit, e.g. 5,000 units/$700, 180-day validity; a Trial Resource Package for integration testing is offered | [docs](https://kling.ai/document-api/guides/get-started/quick-start) |
| [Luma AI Dream Machine API](https://lumalabs.ai)
[](https://www.npmjs.com/package/lumaai) [](https://pypi.org/project/lumaai/) [](https://github.com/lumalabs/luma-api-mcp) | Generate and extend AI videos from text or start/end keyframe images via async REST API (Ray 3.2). | API key | [✅](https://github.com/lumalabs/luma-api-mcp) | Paid only; pay per video, e.g. Ray 3.2 5s text/image-to-video $0.15 (540p) / $0.30 (720p) / $1.20 (1080p), $5,000/mo cap on default Build tier | [docs](https://docs.agents.lumalabs.ai) |
| [MiniMax Hailuo API](https://www.minimax.io)
[](https://github.com/MiniMax-AI/MiniMax-MCP) [](https://github.com/MiniMax-AI/MiniMax-MCP/issues) | Async text-to-video, image-to-video and subject-reference video generation via REST API, up to 1080p. | API key | [✅](https://github.com/MiniMax-AI/MiniMax-MCP) | new accounts get 50 signup credits (~1 short clip); 5s video costs ~45-70 credits, 1000 credits=$1 | [docs](https://platform.minimax.io/docs/api-reference/video-generation-t2v) |
| [PixVerse API](https://pixverse.ai)
[](https://github.com/PixVerseAI/PixVerse-MCP) | Generate text-to-video, image-to-video, transition and fusion clips (360p-1080p) via REST API. | API key | [✅](https://github.com/PixVerseAI/PixVerse-MCP) | Paid only; prepaid credits from $10, $1 = 5 videos (v6, 720p, 5s, no audio) | [docs](https://docs.platform.pixverse.ai) |
| [Runway API](https://runwayml.com)
[](https://www.npmjs.com/package/@runwayml/sdk) [](https://pypi.org/project/runwayml/) [](https://github.com/runwayml/sdk-python/issues) | Generate and edit images/video (Gen-4.5) via async task-based REST API: submit, poll, download. | API key | [✅](https://mcp.runwayml.com/mcp) | no free tier; $10 minimum credit top-up, $0.01/credit | [docs](https://docs.dev.runwayml.com) |
| [Shotstack API](https://shotstack.io) | Compose Edit JSON timelines to programmatically render, edit, and template videos, images and audio. | API key | [✅](https://mcp.shotstack.io/) | Trial: 10 free credits one-time (valid 30 days), then pay-as-you-go or subscription; stage sandbox (https://api.shotstack.io/edit/stage) for development, v1 production without watermarks | [docs](https://shotstack.io/docs/api/) |
| [Synthesia API](https://www.synthesia.io)
⭐⭐⭐⭐⭐ **5.0**/5 · [1 review](https://sourceforge.net/software/product/Synthesia/ "SourceForge") | Generate AI avatar talking-head videos from text scripts via REST API; supports custom avatars and voices. | API key | [✅](https://mcp.synthesia.io/mcp) | Paid only; API access requires the Creator plan or above | [docs](https://docs.synthesia.io/reference/introduction) |
| [Tavus API](https://www.tavus.io)
[](https://www.npmjs.com/package/tavus) | Create AI video replicas and real-time conversational video agents (CVI) via REST API. | API key | [✅](https://mcp.tavus.io/mcp) | 🆓 Free tier: Free plan with 25 min of conversational video and 5 min of video generation per month, full API access, 25 stock replicas; Starter $59/mo | [docs](https://docs.tavus.io/api-reference/overview) |
## Speech and audio
*Text-to-speech, speech-to-text, voice cloning, dubbing and audio intelligence.* — 13 services. JSON: [`catalog/audio-speech.json`](catalog/audio-speech.json)
| Service | What an agent can do | Auth | MCP | Free tier | Docs |
|---|---|---|:-:|---|---|
| [Amazon Polly / Amazon Transcribe (AWS)](https://aws.amazon.com/polly/)
[](https://www.npmjs.com/package/@aws-sdk/client-polly) [](https://www.npmjs.com/package/@aws-sdk/client-transcribe) [](https://stackoverflow.com/questions/tagged/amazon-polly) [](https://github.com/awslabs/mcp) [](https://github.com/aws/aws-sdk-js-v3/issues) | Convert text to lifelike speech (Polly) and transcribe audio with speaker diarization (Transcribe) via AWS API. | cloud IAM | [✅](https://github.com/awslabs/mcp/tree/main/src/aws-api-mcp-server) | 🆓 Free tier: Polly 5M chars/mo standard (neural 1M, generative 100K chars/mo for first 12 months), Transcribe 60 min/mo (12 months); new AWS accounts since 2025-07-15 get up to $200 Free Tier credits | [docs](https://docs.aws.amazon.com/polly/latest/dg/what-is.html) |
| [AssemblyAI API](https://www.assemblyai.com)
[](https://www.npmjs.com/package/assemblyai) [](https://pypi.org/project/assemblyai/) [](https://github.com/AssemblyAI/assemblyai-node-sdk/issues) | Transcribe recorded or streaming audio with speaker diarization, sentiment analysis and LLM-based audio insights via REST. | API key | — | Trial: $50 in free credits one-time on signup, no card required, credits do not expire (LLM Gateway not included); then pay-as-you-go | [docs](https://www.assemblyai.com/docs) |
| [Azure AI Speech](https://azure.microsoft.com/products/ai-services/ai-speech)
[](https://www.npmjs.com/package/microsoft-cognitiveservices-speech-sdk) [](https://pypi.org/project/azure-cognitiveservices-speech/) [](https://stackoverflow.com/questions/tagged/azure-speech) [](https://github.com/microsoft/mcp) [](https://github.com/microsoft/cognitive-services-speech-sdk-js/issues) | Convert text to speech, transcribe speech to text and translate speech via REST or Speech SDK. | cloud IAM | [✅](https://github.com/microsoft/mcp) | 🆓 Free tier (F0): 5 audio hrs/mo STT, 0.5M chars/mo neural TTS; batch transcription not available on F0 | [docs](https://learn.microsoft.com/azure/ai-services/speech-service/) |
| [Cartesia API](https://cartesia.ai)
[](https://www.npmjs.com/package/@cartesia/cartesia-js) [](https://pypi.org/project/cartesia/) [](https://github.com/cartesia-ai/cartesia-js/issues) | Generate low-latency real-time text-to-speech, transcribe speech and clone voices via REST/WebSocket API. | API key | [✅](https://mcp.cartesia.ai/mcp) | 🆓 Free tier: 20,000 credits/mo; no commercial-use license and no voice cloning | [docs](https://docs.cartesia.ai) |
| [Deepgram API](https://deepgram.com)
[](https://www.npmjs.com/package/@deepgram/sdk) [](https://pypi.org/project/deepgram-sdk/) [](https://stackoverflow.com/questions/tagged/deepgram) [](https://github.com/deepgram/mcp) [](https://github.com/deepgram/deepgram-python-sdk/issues) | Transcribe batch or streaming audio with diarization, synthesize speech, and run real-time voice agents via REST/WebSocket. | API key | [✅](https://github.com/deepgram/mcp) | Trial: $200 in free credit one-time on signup, no credit card required; then pay-as-you-go | [docs](https://developers.deepgram.com/reference/deepgram-api-overview) |
| [ElevenLabs API](https://elevenlabs.io)
⭐⭐⭐⭐ **4.0**/5 · [4 reviews](https://sourceforge.net/software/product/ElevenLabs/ "SourceForge")
[](https://www.npmjs.com/package/@elevenlabs/elevenlabs-js) [](https://pypi.org/project/elevenlabs/) [](https://github.com/elevenlabs/elevenlabs-python/issues) | Generate, clone and stream text-to-speech voices and transcribe audio via REST/WebSocket API. | API key | [✅](https://api.elevenlabs.io/v1/mcp) | 🆓 Free: limited monthly credits; non-commercial use with attribution only, no voice cloning | [docs](https://elevenlabs.io/docs/api-reference/introduction) |
| [Google Cloud Text-to-Speech / Speech-to-Text](https://cloud.google.com/text-to-speech)
[](https://www.npmjs.com/package/@google-cloud/text-to-speech) [](https://www.npmjs.com/package/@google-cloud/speech) [](https://pypi.org/project/google-cloud-texttospeech/) [](https://pypi.org/project/google-cloud-speech/) [](https://stackoverflow.com/questions/tagged/google-cloud-speech) [](https://github.com/GoogleCloudPlatform/genmedia-creative-studio) [](https://github.com/googleapis/google-cloud-python/issues) | Synthesize lifelike speech from text and transcribe audio to text via REST/gRPC using GCP credentials. | cloud IAM | [✅](https://github.com/GoogleCloudPlatform/genmedia-creative-studio/tree/main/experiments/mcp-genmedia) | 🆓 Free tier: TTS 4M chars/mo Standard and WaveNet, 1M chars/mo Neural2, Chirp 3 HD and Studio; STT 60 min/mo | [docs](https://cloud.google.com/text-to-speech/docs) |
| [Hume AI API](https://www.hume.ai)
[](https://www.npmjs.com/package/hume) [](https://pypi.org/project/hume/) [](https://github.com/HumeAI/mcp-server-hume) [](https://github.com/HumeAI/hume-python-sdk/issues) | Generate expressive text-to-speech and run real-time empathic voice conversations (EVI) via REST/WebSocket. | API key | [✅](https://github.com/HumeAI/mcp-server-hume) | 🆓 Free tier: 10,000 TTS chars/mo + 5 EVI min/mo; new accounts also get $20 in credits | [docs](https://dev.hume.ai/intro) |
| [Murf AI API](https://murf.ai)
⭐⭐⭐⭐⭐ **5.0**/5 · [7 reviews](https://sourceforge.net/software/product/Murf-AI/ "SourceForge")
[](https://github.com/murf-ai/murf-mcp) | Generate AI voiceovers, clone voices and dub audio in 35+ languages via REST API. | API key | [✅](https://github.com/murf-ai/murf-mcp) | Trial: 100,000 characters one-time on the free API plan, no time limit | [docs](https://murf.ai/api/docs/introduction/overview) |
| [OpenAI Audio API (TTS / transcription)](https://platform.openai.com/docs/guides/audio)
⭐⭐⭐⭐⭐ **5.0**/5 · [3 reviews](https://sourceforge.net/software/product/OpenAI/ "SourceForge")
[](https://www.npmjs.com/package/openai) [](https://pypi.org/project/openai/) [](https://stackoverflow.com/questions/tagged/openai-api) [](https://github.com/openai/openai-openapi) [](https://github.com/openai/openai-openapi/issues) | Synthesize speech with TTS models and transcribe or translate audio with Whisper/GPT-4o transcribe via REST. | API key | — | paid only (pay-per-use) | [docs](https://developers.openai.com/api/docs/guides/text-to-speech) |
| [Resemble AI API](https://www.resemble.ai)
⭐⭐ **1.7**/5 · [3 reviews](https://sourceforge.net/software/product/Resemble-AI/ "SourceForge")
[](https://pypi.org/project/resemble/) | Synthesize speech, clone voices, convert speech-to-speech and detect deepfake audio via REST API. | API key | — | Paid only; Flex plan is $0/mo base with pay-as-you-go credits, no free usage allowance stated | [docs](https://docs.resemble.ai/) |
| [Rev AI API](https://www.rev.ai)
[](https://www.npmjs.com/package/revai-node-sdk) [](https://pypi.org/project/rev_ai/) [](https://github.com/revdotcom/revai-python-sdk/issues) | Submit audio for asynchronous or streaming speech-to-text transcription, plus sentiment and topic extraction, via REST. | API key | — | trial credits (about 5 hours of ASR) | [docs](https://docs.rev.ai/) |
| [Speechmatics API](https://www.speechmatics.com)
[](https://www.npmjs.com/package/@speechmatics/batch-client) [](https://pypi.org/project/speechmatics-batch/) [](https://github.com/ArchieMcM234/speechmatics_claude_code_mcp) [](https://github.com/speechmatics/speechmatics-js-sdk/issues) | Transcribe audio in batch or real time with speaker diarization across many languages via REST/WebSocket. | API key | [◐](https://github.com/ArchieMcM234/speechmatics_claude_code_mcp) | Trial: one-time $100 credit grant, no payment card required | [docs](https://docs.speechmatics.com) |
## Music generation
*Generate songs, instrumentals, loops and sound effects from prompts.* — 6 services. JSON: [`catalog/music-generation.json`](catalog/music-generation.json)
| Service | What an agent can do | Auth | MCP | Free tier | Docs |
|---|---|---|:-:|---|---|
| [Beatoven.ai API](https://www.beatoven.ai)
⭐⭐⭐⭐ **3.8**/5 · [4 reviews](https://sourceforge.net/software/product/Beatoven.ai/ "SourceForge") | Generate royalty-cleared background music and sound effects from text prompts via REST API (Maestro). | API key | — | check pricing | [docs](https://www.beatoven.ai/api) |
| [ElevenLabs Music API](https://elevenlabs.io/music)
⭐⭐⭐⭐ **4.0**/5 · [4 reviews](https://sourceforge.net/software/product/ElevenLabs/ "SourceForge")
[](https://www.npmjs.com/package/@elevenlabs/elevenlabs-js) [](https://pypi.org/project/elevenlabs/) [](https://github.com/elevenlabs/elevenlabs-python/issues) | Generate original music tracks from text prompts or detailed composition plans via REST API, with commercial licensing. | API key | [✅](https://api.elevenlabs.io/v1/mcp) | 🆓 Free tier: 10,000 credits per month shared with TTS (music included, no commercial use of music on Free; Starter $6/mo or higher needed) | [docs](https://elevenlabs.io/docs/api-reference/music/compose) |
| [Loudly API](https://www.loudly.com)
⭐ **1.0**/5 · [1 review](https://sourceforge.net/software/product/Loudly/ "SourceForge") | Generate, remix, stem-split, and master music tracks programmatically via REST API. | API key | — | Trial: free track allowance on signup with the API key from the developer portal; then volume-based pricing (Startup/SME/Corporate) or pay-as-you-go | [docs](https://www.loudly.com/developers) |
| [Mubert API](https://mubert.com/api) | Generate streaming or file-based background music from text/image prompts via REST/WebRTC API, 15s-25min tracks. | API key | — | paid only; plans start at $49/mo (100 generations/mo), no free tier | [docs](https://mubert.com/api) |
| [Soundraw API](https://soundraw.io)
⭐ **1.0**/5 · [1 review](https://sourceforge.net/software/product/Soundraw/ "SourceForge") | Generate royalty-free background music tracks by mood, genre, and duration via REST API for embedding in apps. | API key | — | Trial: one-time 2-week free API trial with no commitment; then Starter $29.99/mo for 100 songs with a 6-month minimum commitment | [docs](https://docs.channel.io/soundraw-faq/en/articles/SOUNDRAW-API-fbf580fd) |
| [Stable Audio API (Stability AI)](https://platform.stability.ai)
[](https://pypi.org/project/stability-sdk/) [](https://github.com/Stability-AI/stability-sdk/issues) | Generate music and sound effects from text prompts via REST API (Stable Audio 2.5, or Stable Audio 3.0 for tracks up to 6 minutes). | API key | — | shares Stability AI platform credits; 25 free credits on signup, then pay-as-you-go | [docs](https://platform.stability.ai/docs/api-reference) |
## 3D generation and assets
*Text/image-to-3D mesh generation, texturing and 3D asset libraries.* — 6 services. JSON: [`catalog/3d-generation.json`](catalog/3d-generation.json)
| Service | What an agent can do | Auth | MCP | Free tier | Docs |
|---|---|---|:-:|---|---|
| [Hyper3D Rodin API](https://hyper3d.ai) | Generate 3D meshes from text or images (sketch/regular/detail quality tiers) via an async REST job API. | API key | — | Paid only: API access requires the Business plan ($120/mo, $96/mo billed annually) or Enterprise; direct credits $1.5 each | [docs](https://docs.hyper3d.ai/) |
| [Meshy API](https://www.meshy.ai)
[](https://github.com/meshy-dev/meshy-mcp-server) | Generate, retexture, rig, and animate 3D models from text or images via REST API or official MCP server. | API key | [✅](https://github.com/meshy-dev/meshy-mcp-server) | Paid only: creating API keys requires a paid plan (Pro $20/mo+); Free accounts get only a built-in test key for the Playground (free web plan 100 credits/mo) | [docs](https://docs.meshy.ai/en/api/quick-start) |
| [Sketchfab Data API](https://sketchfab.com/developers)
[](https://github.com/gregkop/sketchfab-mcp-server) | Search, download, and upload 3D models on Sketchfab programmatically via the REST Data API v3. | API key / OAuth | [◐](https://github.com/gregkop/sketchfab-mcp-server) | 🆓 Free: no key needed for search and model listing (GET /v3/search, /v3/models); downloads (/v3/models/{uid}/download) need a free account token | [docs](https://sketchfab.com/developers/data-api/v3) |
| [Stability AI 3D (Stable Fast 3D / SPAR3D) API](https://platform.stability.ai) | Convert a single 2D image into a textured 3D mesh (GLB) via the v2beta/3d REST endpoints. | API key | — | Trial: 25 free credits on signup (1 credit = $0.01), then pay-as-you-go | [docs](https://platform.stability.ai/docs/api-reference#tag/3D) |
| [Tencent Hunyuan3D API](https://3d.hunyuan.tencent.com) | Generate textured 3D meshes (GLB, PBR) from text, images, or sketches via Tencent Cloud's Hunyuan 3D API. | cloud IAM | — | Trial: 200 free credits one-time on first activation (valid 1 year); then postpaid $0.02/credit, Professional generation 25 credits (~$0.50), Express 15 | [docs](https://www.tencentcloud.com/document/product/1284/75539) |
| [Tripo API](https://www.tripo3d.ai)
[](https://pypi.org/project/tripo3d/) [](https://github.com/Tripo-Developer/tripo-mcp) [](https://github.com/Tripo-Developer/tripo-mcp/issues) | Generate textured 3D meshes from text or images via REST API, with an official MCP server for agents. | API key | [✅](https://github.com/VAST-AI-Research/tripo-mcp) | Trial: starter free credits (Tripo docs: 300 free credits; amount varies by signup path), then pay-as-you-go at $0.01/credit | [docs](https://developers.tripo3d.ai/en/docs/authentication) |
## Architecture, CAD and BIM
*Building information models, CAD geometry, construction management and GIS platforms with programmatic access.* — 8 services. JSON: [`catalog/architecture-cad-bim.json`](catalog/architecture-cad-bim.json)
| Service | What an agent can do | Auth | MCP | Free tier | Docs |
|---|---|---|:-:|---|---|
| [Autodesk Platform Services (APS)](https://aps.autodesk.com)
[](https://www.npmjs.com/package/@aps_sdk/authentication) [](https://www.npmjs.com/package/@aps_sdk/model-derivative) [](https://stackoverflow.com/questions/tagged/autodesk-forge) [](https://github.com/autodesk-platform-services/aps-mcp-server-python) | Upload, translate, view and automate CAD/BIM files (Model Derivative, Data Management, Design Automation) via REST APIs. | OAuth 2.0 | [✅](https://github.com/autodesk-platform-services/aps-mcp-server-python) | 🆓 Free tier: limited usage of rated APIs (Automation, Model Derivative, Flow Graph Engine, Reality Capture) per month, renews monthly; Pay as You Go beyond that needs a card or PayPal | [docs](https://aps.autodesk.com/en/docs/) |
| [Bentley iTwin Platform APIs](https://developer.bentley.com)
[](https://www.npmjs.com/package/@itwin/itwins-client) [](https://github.com/iTwin/itwins-client/issues) | Create, manage and query digital twins, iModels and reality/reporting data for infrastructure projects via REST APIs. | OAuth 2.0 | — | 🆓 Free tier: Community plan with 100 credits/month, 10 GB cloud data, 100 GB reality data; non-commercial, non-production use only; no expiry | [docs](https://developer.bentley.com/apis/) |
| [Onshape REST API](https://onshape-public.github.io/docs/)
[](https://apps.apple.com/us/app/onshape-3d-cad/id923421284) | Create, read and modify Onshape CAD documents, parts, assemblies and drawings programmatically via REST API. | API key / OAuth | [✅](https://fs-mcp.labs.onshape.app/mcp) | 🆓 free tier (public documents only); private documents need a paid plan | [docs](https://onshape-public.github.io/docs/) |
| [Procore API](https://developers.procore.com)
⭐⭐⭐⭐⭐ **5.0**/5 · [2 reviews](https://sourceforge.net/software/product/Procore/ "SourceForge")
[](https://apps.apple.com/us/app/procore/id374930542) | Read and write construction project data - RFIs, submittals, drawings, budgets, schedules - via REST API. | OAuth 2.0 | [✅](https://app.procore.com/rest/v1.0/mcp) | 🆓 free developer sandbox; production requires customer's paid Procore plan | [docs](https://developers.procore.com/reference/rest/v1) |
| [Rhino.Compute (McNeel)](https://www.rhino3d.com/compute)
[](https://www.npmjs.com/package/compute-rhino3d) [](https://pypi.org/project/compute-rhino3d/) [](https://stackoverflow.com/questions/tagged/rhino3d) [](https://github.com/mcneel/compute.rhino3d/issues) | Run Rhino/Grasshopper geometry operations headlessly via a stateless REST API you deploy yourself. | API key | — | Paid only: self-hosted, requires a Rhino license; core-hour billing at $0.10 per core per hour of Rhino uptime on Windows Server, no free allowance | [docs](https://developer.rhino3d.com/guides/compute/) |
| [Speckle API](https://speckle.systems)
[](https://www.npmjs.com/package/@speckle/objectloader2) [](https://pypi.org/project/specklepy/) [](https://github.com/bimgeek/speckle-mcp) [](https://github.com/specklesystems/speckle-server/issues) | Send, receive and query 3D/BIM model data across CAD tools (Revit, Rhino, Grasshopper, Tekla) via GraphQL API and SDKs. | API key / OAuth | [◐](https://github.com/bimgeek/speckle-mcp) | 🆓 free Explore plan (1 project, 3 users), unlimited API calls | [docs](https://docs.speckle.systems/dev/) |
| [Trimble Connect API](https://developer.trimble.com)
[](https://apps.apple.com/us/app/trimble-connect/id1076606537) [](https://www.npmjs.com/package/trimble-connect-workspace-api) | Manage Trimble Connect projects, files, BIM models, issues/topics and metadata via REST APIs (Core, Model, Organizer). | OAuth 2.0 | — | check pricing | [docs](https://developer.trimble.com/docs/connect) |
| [Zoo Text-to-CAD API (KittyCAD)](https://zoo.dev)
[](https://www.npmjs.com/package/@kittycad/lib) [](https://pypi.org/project/kittycad/) [](https://github.com/KittyCAD/mcp) [](https://github.com/KittyCAD/mcp/issues) | Convert CAD files and run modeling operations via REST API; text-to-CAD generation runs through the WebSocket copilot and the MCP server. | API key | [✅](https://github.com/KittyCAD/mcp) | start free trial credits, then usage-based pay-as-you-go | [docs](https://zoo.dev/docs/api) |
## Diagrams and software architecture
*Render or edit diagrams (Mermaid, PlantUML, C4), whiteboards and architecture models.* — 8 services. JSON: [`catalog/diagrams-software-architecture.json`](catalog/diagrams-software-architecture.json)
| Service | What an agent can do | Auth | MCP | Free tier | Docs |
|---|---|---|:-:|---|---|
| [Eraser API (DiagramGPT)](https://www.eraser.io) | Generate diagrams from text prompts (DiagramGPT) and manage Eraser files programmatically via REST API. | API key | [✅](https://app.eraser.io/api/mcp) | paid only - API tokens require an active paid team plan | [docs](https://docs.eraser.io/reference/getting-started) |
| [IcePanel API](https://icepanel.io)
⭐⭐⭐⭐⭐ **5.0**/5 · [1 review](https://sourceforge.net/software/product/IcePanel/ "SourceForge") | Programmatically create, read, import, and export C4-style architecture landscapes and models via REST API. | API key | [✅](https://mcp.icepanel.io/mcp) | 🆓 free tier: 10,000 read requests/mo, 1,000 write requests/mo, 5 import/export requests/mo | [docs](https://developer.icepanel.io/) |
| [Kroki](https://kroki.io) | Render 25+ diagram-as-code formats (PlantUML, Mermaid, C4, GraphViz, BPMN, etc.) from text via a free HTTP GET/POST API. | none | — | 🆓 free, no key; public hosted instance at kroki.io sponsored by Exoscale (no SLA) | [docs](https://docs.kroki.io/kroki/) |
| [Lucid (Lucidchart) REST API](https://developer.lucid.co)
[](https://apps.apple.com/us/app/lucidchart/id611543423) [](https://stackoverflow.com/questions/tagged/lucidchart) | Create, read, search, and manage Lucidchart documents and folders programmatically via REST API. | API key / OAuth | [✅](https://mcp.lucid.app/mcp) | check pricing | [docs](https://developer.lucid.co) |
| [Mermaid Chart API](https://www.mermaidchart.com)
[](https://www.npmjs.com/package/@mermaidchart/sdk) [](https://stackoverflow.com/questions/tagged/mermaid) | Validate, render, and save Mermaid diagrams via Mermaid Chart's official MCP server using an account API token. | API key | [✅](https://mcp.mermaid.ai/mcp) | 🆓 unauthenticated MCP validate/render tools are free; saving to a Mermaid Chart account needs a token, check pricing for limits | [docs](https://mermaid.ai/docs/ai/mcp-server) |
| [Miro REST API](https://developers.miro.com)
⭐⭐⭐⭐⭐ **4.7**/5 · [121 reviews](https://sourceforge.net/software/product/Miro/ "SourceForge")
[](https://apps.apple.com/us/app/miro-your-visual-workspace/id1180074773) [](https://www.npmjs.com/package/@mirohq/miro-api) [](https://pypi.org/project/miro-api/) [](https://github.com/miroapp/api-clients/issues) | Create/read boards and items via REST API, or use Miro's official MCP server to search, build, and summarize boards. | OAuth 2.0 | [✅](https://mcp.miro.com/) | 🆓 Free tier: up to 3 editable team boards; MCP on all plans, capped per day at 100 tool calls on Free (Starter 500, Business 2,000, Enterprise 10,000) | [docs](https://developers.miro.com/docs) |
| [Napkin AI API](https://www.napkin.ai)
⭐⭐⭐⭐⭐ **5.0**/5 · [1 review](https://sourceforge.net/software/product/Napkin/ "SourceForge") | Generate diagrams, flowcharts, mind maps, and charts from text via REST API, exporting to SVG, PNG, or PPT. | API key | — | 🆓 included on every plan; any account can create a token and call the API, limited by credits | [docs](https://api.napkin.ai/) |
| [PlantUML Server API](https://plantuml.com)
[](https://stackoverflow.com/questions/tagged/plantuml) | Render UML and architecture-as-code diagrams to PNG/SVG/ASCII via a free public HTTP GET API using encoded diagram text. | none | — | 🆓 free, no key; public hosted server at plantuml.com/plantuml | [docs](https://plantuml.com/server) |
## Design and UI
*Read and write design files, generate branded graphics and publish websites.* — 6 services. JSON: [`catalog/design-ui.json`](catalog/design-ui.json)
| Service | What an agent can do | Auth | MCP | Free tier | Docs |
|---|---|---|:-:|---|---|
| [Canva Connect API](https://www.canva.dev)
[](https://apps.apple.com/us/app/canva-ai-photo-video-editor/id897446215) | Programmatically create, autofill, and export Canva designs, and manage assets and comments via a REST API. | OAuth 2.0 | [✅](https://mcp.canva.com/mcp) | check pricing (free to build/test; public apps require Canva review before production use) | [docs](https://www.canva.dev/docs/connect/) |
| [Figma REST API / Dev Mode MCP](https://www.figma.com/developers)
⭐⭐⭐⭐⭐ **4.7**/5 · [15 reviews](https://sourceforge.net/software/product/Figma/ "SourceForge")
[](https://apps.apple.com/us/app/figma/id1152747299) [](https://www.npmjs.com/package/@figma/rest-api-spec) [](https://stackoverflow.com/questions/tagged/figma) [](https://github.com/figma/rest-api-spec) [](https://github.com/figma/rest-api-spec/issues) | Read and write Figma file/comment/component data via REST, and feed live design context to coding agents via the official Dev Mode MCP server. | API key / OAuth | [✅](https://mcp.figma.com/mcp) | 🆓 free: personal access tokens work on free plan, rate-limited per seat/plan tier; MCP free during beta | [docs](https://developers.figma.com/docs/rest-api/) |
| [Framer](https://www.framer.com)
⭐⭐⭐⭐ **4.0**/5 · [1 review](https://sourceforge.net/software/product/Framer/ "SourceForge")
[](https://www.npmjs.com/package/framer-api) | Automate publishing of Framer sites programmatically (get project info, publish previews, promote to production) via a Node SDK. | API key | — | 🆓 Free: Server API is free while in beta; Framer plans per-use pricing with a monthly free allowance later | [docs](https://www.framer.com/developers/server-api-quick-start) |
| [Penpot API](https://penpot.app)
⭐⭐⭐⭐⭐ **5.0**/5 · [1 review](https://sourceforge.net/software/product/penpot/ "SourceForge") | Read, create, and modify Penpot design files, comments, and webhooks via a token-authenticated RPC/REST API, or via the official MCP server. | API key | [✅](https://design.penpot.app/mcp/stream) | 🆓 free tier: free cloud account (design.penpot.app) plus free, open-source self-hosting | [docs](https://design.penpot.app/api/_doc) |
| [v0 Platform API (Vercel)](https://v0.app)
[](https://www.npmjs.com/package/v0-sdk) [](https://github.com/vercel/v0-sdk/issues) | Generate full UI/frontend code from natural-language prompts, iterate via chat, and deploy the result directly to Vercel via REST API. | API key | [✅](https://v0.app/api/mcp) | 🆓 Free tier: v0 Free plan includes $5 of credits per month (7 messages/day); Platform API use on Free not confirmed, credits also included on Premium/Team plans | [docs](https://v0.app/docs/api) |
| [Webflow Data API](https://developers.webflow.com)
⭐⭐⭐ **3.3**/5 · [3 reviews](https://sourceforge.net/software/product/Webflow/ "SourceForge")
[](https://www.npmjs.com/package/webflow-api) [](https://pypi.org/project/webflow/) [](https://stackoverflow.com/questions/tagged/webflow) [](https://github.com/webflow/js-webflow-api/issues) | Create/update CMS collections, items, and pages, and publish Webflow sites programmatically via REST API or the official MCP server. | API key / OAuth | [✅](https://mcp.webflow.com/mcp) | check pricing (API access itself is free with a token; some CMS/publish actions require the site to be on a paid Webflow plan) | [docs](https://developers.webflow.com/data/reference/rest-introduction) |
## Documents, OCR and presentations
*Parse PDFs and scans, convert file formats, generate slides and collect e-signatures.* — 14 services. JSON: [`catalog/presentations-documents.json`](catalog/presentations-documents.json)
| Service | What an agent can do | Auth | MCP | Free tier | Docs |
|---|---|---|:-:|---|---|
| [Adobe PDF Services API](https://developer.adobe.com/document-services/)
[](https://www.npmjs.com/package/@adobe/pdfservices-node-sdk) [](https://pypi.org/project/pdfservices-sdk/) | Programmatically create, convert, combine, compress, OCR, and extract data from PDF documents. | OAuth 2.0 | — | 🆓 free tier: 500 document transactions/month, no credit card required | [docs](https://developer.adobe.com/document-services/docs/overview/pdf-services-api/) |
| [AWS Textract](https://aws.amazon.com/textract/)
[](https://www.npmjs.com/package/@aws-sdk/client-textract) [](https://stackoverflow.com/questions/tagged/amazon-textract) [](https://github.com/aws/aws-sdk-js-v3/issues) | Detect and extract text, forms, tables, and data from scanned documents and images via API calls. | cloud IAM | [✅](https://aws-mcp.us-east-1.api.aws/mcp) | Trial: new AWS customers get 3 months free, per month 1,000 pages DetectDocumentText, 100 pages AnalyzeDocument forms/tables/layout/queries, 100 AnalyzeExpense/AnalyzeID, 2,000 pages AnalyzeLending; card required | [docs](https://docs.aws.amazon.com/textract/latest/dg/what-is.html) |
| [Azure AI Document Intelligence](https://azure.microsoft.com/products/ai-services/ai-document-intelligence)
[](https://www.npmjs.com/package/@azure-rest/ai-document-intelligence) [](https://pypi.org/project/azure-ai-documentintelligence/) [](https://stackoverflow.com/questions/tagged/azure-form-recognizer) [](https://github.com/Azure/azure-sdk-for-python/issues) | Analyze forms, invoices, receipts, and scanned documents to extract structured JSON via REST API. | cloud IAM | — | 🆓 Free tier: F0 pricing tier, 500 pages/month; analyzes only the first 2 pages per document, 4 MB max file, 1 TPS | [docs](https://learn.microsoft.com/en-us/azure/ai-services/document-intelligence/) |
| [CloudConvert API](https://cloudconvert.com/api/v2)
⭐⭐⭐⭐⭐ **5.0**/5 · [1 review](https://sourceforge.net/software/product/CloudConvert/ "SourceForge")
[](https://www.npmjs.com/package/cloudconvert) [](https://pypi.org/project/cloudconvert/) [](https://stackoverflow.com/questions/tagged/cloudconvert) [](https://github.com/cloudconvert/cloudconvert-node/issues) | Convert, compress, merge, watermark, and OCR files across 200+ formats via REST API or MCP. | API key / OAuth | [✅](https://mcp.cloudconvert.com) | 🆓 Free: 10 conversion credits/day including all API features, no credit card required; paid credit packages beyond that; free Sandbox API for unlimited test jobs without consuming credits | [docs](https://cloudconvert.com/api/v2) |
| [DocuSign eSignature API](https://developers.docusign.com)
⭐⭐⭐⭐ **4.3**/5 · [43 reviews](https://sourceforge.net/software/product/DocuSign/ "SourceForge")
[](https://apps.apple.com/us/app/docusign-upload-sign-docs/id474990205) [](https://www.npmjs.com/package/docusign-esign) [](https://pypi.org/project/docusign-esign/) [](https://stackoverflow.com/questions/tagged/docusignapi) [](https://github.com/docusign/OpenAPI-Specifications) [](https://github.com/docusign/docusign-esign-node-client/issues) | Send, sign, track, and manage electronic signature envelopes and agreement workflows via REST API. | OAuth 2.0 | [✅](https://mcp.docusign.com/mcp) | 🆓 free developer/demo sandbox account (account-d.docusign.com) with unlimited test envelopes; production use requires a paid DocuSign plan | [docs](https://developers.docusign.com/docs/esign-rest-api/) |
| [Gamma API](https://gamma.app)
[](https://apps.apple.com/us/app/gamma-ai-slides-design/id6768404578) | Generate, poll, and export AI-made presentations, documents, or social posts as PDF/PPTX via REST API. | API key / OAuth | [✅](https://mcp.gamma.app/mcp) | Paid only for API keys (Pro, Ultra, Teams or Business plan); the Gamma MCP server/connectors work on all plans including Free, with generations consuming credits | [docs](https://developers.gamma.app/generations/create-generation) |
| [Google Document AI](https://cloud.google.com/document-ai)
[](https://www.npmjs.com/package/@google-cloud/documentai) [](https://pypi.org/project/google-cloud-documentai/) [](https://github.com/googleapis/google-cloud-python/issues) | Extract text, tables, and structured data from documents like invoices, forms, and IDs via REST API. | cloud IAM | — | 🆓 Free tier: first 1,000 pages/month free for Enterprise Document OCR only (then $1.50/1,000); Form Parser and custom extractor $30/1,000 pages with no free band | [docs](https://cloud.google.com/document-ai/docs/reference/rest) |
| [Google Slides / Docs API](https://developers.google.com/slides)
[](https://stackoverflow.com/questions/tagged/google-slides-api) | Read and programmatically edit Google Slides presentations (slides, shapes, text, tables) via REST API or MCP. | OAuth 2.0 | [✅](https://slidesmcp.googleapis.com/mcp/v1) | 🆓 free, no key (standard Google API usage quotas apply; requires GCP project + OAuth consent) | [docs](https://developers.google.com/workspace/slides/api/reference/rest) |
| [LlamaParse (LlamaCloud)](https://www.llamaindex.ai/llamaparse)
[](https://www.npmjs.com/package/llama-cloud-services) [](https://pypi.org/project/llama-cloud-services/) [](https://stackoverflow.com/questions/tagged/llama-parse) [](https://github.com/run-llama/llama_cloud_services/issues) | Parse, classify, extract, and split complex documents (tables, forms, charts) into LLM-ready structured data via API. | API key | [✅](https://mcp.llamaindex.ai/mcp) | 🆓 Free tier: Free plan with 10K credits/month; beyond that credit-based at $1.25/1,000 credits (1-45+ credits/page depending on tier); 48h parse cache is free to re-query | [docs](https://developers.llamaindex.ai/llamaparse/) |
| [Mistral OCR API](https://mistral.ai)
[](https://www.npmjs.com/package/@mistralai/mistralai) [](https://pypi.org/project/mistralai/) [](https://stackoverflow.com/questions/tagged/mistral-ai) [](https://github.com/D-Diaa/mistral-ocr-mcp) [](https://github.com/mistralai/client-python/issues) | Extract text, tables, and layout structure from PDFs and images as structured Markdown/JSON via REST API. | API key | [◐](https://github.com/D-Diaa/mistral-ocr-mcp) | 🆓 Free tier: Free plan includes $10/month in API credits; then $4/1,000 pages (OCR), $5/1,000 pages (Document AI); 50% off via Batch API | [docs](https://docs.mistral.ai/capabilities/OCR/basic_ocr/) |
| [PDF.co API](https://pdf.co)
[](https://github.com/pdfdotco/pdfco-mcp) | Convert, merge, split, edit, fill forms, OCR, and extract data from PDFs via REST API. | API key | [✅](https://github.com/pdfdotco/pdfco-mcp) | trial credits: 10,000 credits for 1 month, no credit card required | [docs](https://developer.pdf.co) |
| [Reducto API](https://reducto.ai)
[](https://www.npmjs.com/package/reductoai) [](https://pypi.org/project/reductoai/) | Parse, extract, split, edit, and classify complex documents into structured JSON/Markdown via REST API or SDKs. | API key | [✅](https://mcp.reducto.ai/mcp) | Trial: $150 in free credits (15,000 credits) one-time for new Standard accounts; then standard rates; Startup Program gives extra credits to qualifying teams | [docs](https://docs.reducto.ai/get-started/quickstart) |
| [SlideSpeak API](https://slidespeak.co)
⭐ **1.0**/5 · [1 review](https://sourceforge.net/software/product/SlideSpeak/ "SourceForge")
[](https://github.com/SlideSpeak/slidespeak-mcp) | Generate, edit, and download PowerPoint/PDF presentations from text, documents, or outlines via REST API. | API key | [✅](https://github.com/SlideSpeak/slidespeak-mcp) | Trial: free API trial, no credit card required; then API plans from $49/month (1,000 credits) | [docs](https://docs.slidespeak.co/v1/quickstart) |
| [Unstructured API](https://unstructured.io)
[](https://www.npmjs.com/package/unstructured-client) [](https://pypi.org/project/unstructured-client/) [](https://github.com/Unstructured-IO/unstructured-python-client/issues) | Partition and extract structured elements (text, tables, layout) from PDFs, docs, and images for RAG pipelines via API. | API key | [✅](https://mcp.transform.unstructured.io) | Trial: 10,000 free pages one-time on signup, no credit card; then pay-as-you-go at $0.015/page | [docs](https://docs.unstructured.io/api-reference/overview) |
## Translation and language
*Machine translation, grammar and style checking.* — 6 services. JSON: [`catalog/translation-language.json`](catalog/translation-language.json)
| Service | What an agent can do | Auth | MCP | Free tier | Docs |
|---|---|---|:-:|---|---|
| [Amazon Translate](https://aws.amazon.com/translate/)
⭐⭐⭐⭐⭐ **5.0**/5 · [1 review](https://sourceforge.net/software/product/Amazon-Translate/ "SourceForge")
[](https://www.npmjs.com/package/@aws-sdk/client-translate) [](https://stackoverflow.com/questions/tagged/amazon-translate) [](https://github.com/awslabs/mcp) [](https://github.com/aws/aws-sdk-js-v3/issues) | Translate text and documents in real time or batch across 75+ languages via the AWS SDK/API. | cloud IAM | [✅](https://github.com/awslabs/mcp/tree/main/src/aws-api-mcp-server) | 🆓 free tier: 2M characters/month for 12 months (new AWS accounts) | [docs](https://docs.aws.amazon.com/translate/) |
| [Azure AI Translator](https://azure.microsoft.com/products/ai-services/ai-translator)
[](https://www.npmjs.com/package/@azure-rest/ai-translation-text) [](https://pypi.org/project/azure-ai-translation-text/) [](https://github.com/Azure/azure-sdk-for-python/issues) | Translate text, detect language, and transliterate across 100+ languages via REST API within Azure AI Services. | API key | ◐ | 🆓 free tier (F0): 2,000,000 characters/month | [docs](https://learn.microsoft.com/azure/ai-services/translator/) |
| [DeepL API](https://www.deepl.com/pro-api)
⭐⭐⭐⭐ **4.0**/5 · [1 review](https://sourceforge.net/software/product/DeepL/ "SourceForge")
[](https://apps.apple.com/us/app/deepl-translate/id1552407475) [](https://www.npmjs.com/package/deepl-node) [](https://pypi.org/project/deepl/) [](https://stackoverflow.com/questions/tagged/deepl) [](https://github.com/DeepL/deepl-mcp-server) [](https://github.com/DeepL/deepl-python/issues) | Translate and rephrase text or documents between 30+ languages via REST API, SDKs, or an official MCP server. | API key | [✅](https://github.com/DeepL/deepl-mcp-server) | 🆓 Free: API Developer plan ('Test out the API for free', EUR 0 base price, 1,000,000 characters/month in the pricing data); legacy API Free keys (:fx) use api-free.deepl.com | [docs](https://developers.deepl.com/docs) |
| [Google Cloud Translation](https://cloud.google.com/translate)
[](https://www.npmjs.com/package/@google-cloud/translate) [](https://pypi.org/project/google-cloud-translate/) [](https://stackoverflow.com/questions/tagged/google-cloud-translate) [](https://github.com/googleapis/google-cloud-python/issues) | Translate text/documents and detect language across 100+ languages via REST/gRPC API within Google Cloud. | cloud IAM | ◐ | 🆓 free tier: 500,000 characters/month (permanent, not a trial) | [docs](https://cloud.google.com/translate/docs) |
| [LanguageTool API](https://languagetool.org/http-api/)
⭐⭐⭐⭐⭐ **5.0**/5 · [1 review](https://sourceforge.net/software/product/LanguageTool/ "SourceForge")
[](https://stackoverflow.com/questions/tagged/languagetool) | Check grammar, style, and spelling in 30+ languages via a public HTTP API, with an optional Premium key for higher limits. | API key | ◐ | 🆓 Free: no key needed on public endpoint (rate-limited: 20 req/min, 75KB text/min per IP, 20KB per request) | [docs](https://languagetool.org/http-api/) |
| [Lara Translate API](https://laratranslate.com)
⭐⭐⭐⭐⭐ **5.0**/5 · [1 review](https://sourceforge.net/software/product/Lara-Translate/ "SourceForge")
[](https://www.npmjs.com/package/@translated/lara) [](https://pypi.org/project/lara-sdk/) | Translate text, documents, images and audio with context, style, glossaries and translation memories, and detect the language of text. | API key | [✅](https://mcp-v2.laratranslate.com/v1) | 🆓 Free: 10,000 API characters/month (shared by translation and language detection), no credit card required | [docs](https://developers.laratranslate.com/docs/introduction) |
## Code execution sandboxes
*Isolated cloud environments where an agent can run code, shells and whole dev environments safely.* — 10 services. JSON: [`catalog/code-execution-sandbox.json`](catalog/code-execution-sandbox.json)
| Service | What an agent can do | Auth | MCP | Free tier | Docs |
|---|---|---|:-:|---|---|
| [Cloudflare Sandbox SDK](https://developers.cloudflare.com/sandbox/)
⭐⭐⭐⭐⭐ **4.5**/5 · [12 reviews](https://sourceforge.net/software/product/Cloudflare/ "SourceForge")
[](https://www.npmjs.com/package/@cloudflare/sandbox) [](https://github.com/cloudflare/sandbox-sdk/issues) | Deploy a Cloudflare Worker embedding this SDK to run untrusted code in per-request container sandboxes. | API key | [✅](https://containers.mcp.cloudflare.com/mcp) | requires Workers Paid plan ($5/mo) for Containers; no free tier for container-backed sandboxes | [docs](https://developers.cloudflare.com/sandbox/api/) |
| [CodeSandbox SDK](https://codesandbox.io/sdk)
[](https://www.npmjs.com/package/@codesandbox/sdk) [](https://stackoverflow.com/questions/tagged/codesandbox) [](https://github.com/codesandbox/codesandbox-sdk/issues) | Programmatically create, resume, and control cloud VM sandboxes to run and preview AI-written code. | API key | — | 🆓 Free: Build (free) plan with 400 VM credits/month (~40 Nano-VM hours) and up to 10 concurrent VMs | [docs](https://codesandbox.io/docs/sdk) |
| [Daytona](https://www.daytona.io)
[](https://www.npmjs.com/package/@daytonaio/sdk) [](https://pypi.org/project/daytona/) [](https://github.com/daytona/clients/issues) | Create elastic remote sandboxes via SDK/API to run AI-generated code with sub-second startup. | API key | [✅](https://www.daytona.io/docs/en/mcp/) | Trial: $200 free compute credit one-time on signup, no credit card required; first 5 GiB storage free; startup program up to $50k credits | [docs](https://www.daytona.io/docs) |
| [E2B](https://e2b.dev)
[](https://www.npmjs.com/package/e2b) [](https://pypi.org/project/e2b/) [](https://github.com/e2b-dev/mcp-server) [](https://github.com/e2b-dev/E2B/issues) | Spin up isolated Firecracker cloud sandboxes via SDK/REST to execute AI-generated code and return results. | API key | [✅](https://github.com/e2b-dev/mcp-server) | Trial: one-time $100 usage credit on signup (Hobby, no card); up to 1 h per sandbox, 20 concurrent; then pay-as-you-go | [docs](https://e2b.dev/docs) |
| [Judge0](https://judge0.com) | Submit source code and stdin via REST to compile/run it in 60+ languages and poll for the result. | API key | — | Paid only on Judge0 Cloud (Pro EUR 27/mo for 2,000 submissions/day and up); self-host free & open-source (GPLv3) | [docs](https://ce.judge0.com/) |
| [Modal](https://modal.com)
[](https://www.npmjs.com/package/modal) [](https://pypi.org/project/modal/) [](https://github.com/milkymap/mcp4modal_sandbox) [](https://github.com/modal-labs/modal-client/issues) | Programmatically launch serverless sandboxes, optionally with GPUs, to execute untrusted or agent code. | API key | [◐](https://github.com/milkymap/mcp4modal_sandbox) | 🆓 Starter plan: $0 base + $30/mo free credits | [docs](https://modal.com/docs/guide/sandboxes) |
| [Piston](https://github.com/engineer-man/piston)
[](https://github.com/engineer-man/piston) [](https://github.com/engineer-man/piston/issues) | Compile and run code in 70+ languages inside isolated containers via a self-hostable REST API (the public instance needs a granted token). | API key | — | 🆓 Free: self-host (open source, Docker); public emkc.org API closed to open use since 2026-02-15, tokens only for approved non-commercial educational projects | [docs](https://piston.readthedocs.io/en/latest/api-v2/) |
| [Riza](https://riza.io)
[](https://www.npmjs.com/package/@riza-io/api) [](https://pypi.org/project/rizaio/) | Call a REST API to execute untrusted Python/JS/Ruby/PHP code in sandboxes that start in under 10ms. | API key | [✅](https://mcp.riza.io/code-interpreter) | 🆓 Free tier: Hobby plan free forever, 100,000 requests/month, 30 s execution limit; then usage-based pricing | [docs](https://docs.riza.io/api-reference/command/execute-code) |
| [Runloop](https://www.runloop.ai)
[](https://www.npmjs.com/package/@runloop/api-client) [](https://pypi.org/project/runloop_api_client/) [](https://github.com/runloopai/api-client-ts) | Create, snapshot, suspend/resume, and run commands in Linux Devboxes via API/SDK for agent coding tasks. | API key | [✅](https://github.com/runloopai/api-client-ts/tree/main/packages/mcp-server) | $50 free credits on signup, then usage-based ($0.108/CPU-hr, $0.0252/GB-hr) | [docs](https://docs.runloop.ai/docs/devboxes/overview) |
| [Vercel Sandbox](https://vercel.com/docs/vercel-sandbox)
⭐⭐⭐⭐⭐ **4.5**/5 · [2 reviews](https://sourceforge.net/software/product/Vercel/ "SourceForge")
[](https://www.npmjs.com/package/@vercel/sandbox) [](https://github.com/vercel/sandbox/issues) | Boot ephemeral Firecracker microVMs via SDK/REST to run agent- or AI-generated code and shell commands. | API key / OAuth | [✅](https://vercel.com/docs/mcp) | 🆓 usage included on Hobby plan, otherwise usage-based on Pro/Enterprise | [docs](https://vercel.com/docs/sandbox) |
## Developer platforms and DevOps
*Source control, CI/CD, monitoring, error tracking, incident management and package registries.* — 12 services. JSON: [`catalog/developer-devops.json`](catalog/developer-devops.json)
| Service | What an agent can do | Auth | MCP | Free tier | Docs |
|---|---|---|:-:|---|---|
| [CircleCI API](https://circleci.com/docs/api/v2/)
⭐⭐⭐ **3.0**/5 · [2 reviews](https://sourceforge.net/software/product/CircleCI/ "SourceForge") | An agent can trigger pipelines, rerun workflows, fetch logs/test results, and validate CI/CD configuration via REST. | API key | [✅](https://mcp.circleci.com/v1/mcp) | 🆓 free plan: 30,000 credits/month (~6,000 build minutes on a small Docker resource class), credits expire monthly | [docs](https://circleci.com/docs/api/v2/) |
| [Datadog API](https://docs.datadoghq.com/api/)
⭐⭐⭐⭐⭐ **4.9**/5 · [7 reviews](https://sourceforge.net/software/product/Datadog/ "SourceForge")
[](https://www.npmjs.com/package/@datadog/datadog-api-client) [](https://pypi.org/project/datadog-api-client/) [](https://stackoverflow.com/questions/tagged/datadog) [](https://github.com/DataDog/datadog-api-client-python/issues) | An agent can query metrics, logs, traces, monitors, and dashboards, and manage Datadog configuration via REST. | API key | [✅](https://mcp.datadoghq.com/v1/mcp) | 🆓 free Infrastructure Monitoring plan: 1-day metric retention, up to 5 hosts; other products (APM, Logs, Security) are paid | [docs](https://docs.datadoghq.com/api/) |
| [Docker Hub API](https://docs.docker.com/docker-hub/api/latest/)
⭐⭐⭐⭐⭐ **4.7**/5 · [3 reviews](https://sourceforge.net/software/product/Docker/ "SourceForge")
[](https://github.com/docker/hub-mcp) | An agent can search, push, pull, tag, and manage container images and repositories on Docker Hub. | API key | [✅](https://github.com/docker/hub-mcp) | 🆓 free personal accounts with rate-limited image pulls; paid Pro/Team/Business tiers raise pull limits | [docs](https://docs.docker.com/reference/api/hub/latest/) |
| [GitHub API](https://docs.github.com/rest)
⭐⭐⭐⭐⭐ **4.7**/5 · [21 reviews](https://sourceforge.net/software/product/GitHub/ "SourceForge")
[](https://www.npmjs.com/package/octokit) [](https://www.npmjs.com/package/@octokit/rest) [](https://stackoverflow.com/questions/tagged/github-api) [](https://github.com/octokit/octokit.js/issues) [](https://smithery.ai/servers/github) | An agent can manage repositories, issues, pull requests, releases, and code search via REST or GraphQL. | API key / OAuth | [✅](https://api.githubcopilot.com/mcp/) | 🆓 free with any GitHub account; 5,000 req/hr authenticated, 60/hr unauthenticated | [docs](https://docs.github.com/rest) |
| [GitLab API](https://docs.gitlab.com/api/)
⭐⭐⭐⭐ **4.4**/5 · [14 reviews](https://sourceforge.net/software/product/GitLab/ "SourceForge")
[](https://stackoverflow.com/questions/tagged/gitlab) | An agent can manage projects, issues, merge requests, CI/CD pipelines, and repository files via REST/GraphQL. | API key / OAuth | [✅](https://gitlab.com/api/v4/mcp) | 🆓 free tier: full REST API access on GitLab.com Free plan; some features gated to Premium/Ultimate | [docs](https://docs.gitlab.com/api/) |
| [Globalping Network Measurement API](https://globalping.io)
[](https://www.npmjs.com/package/globalping) | Lets an agent run ping, traceroute, MTR, DNS and HTTP tests from thousands of probes worldwide to check reachability, latency and routing of a host. | none | [✅](https://mcp.globalping.dev/mcp) | 🆓 No key; 250 tests/hour anonymously (up to 50 probes per measurement), 500 tests/hour with a free account token (up to 500 probes); extra tests use credits. | [docs](https://globalping.io/docs/api.globalping.io) |
| [Maven Central Search API](https://central.sonatype.com)
[](https://github.com/arvindand/maven-tools-mcp) | Lets an agent search Maven Central for Java/JVM artifacts by groupId, artifactId, class name or SHA-1 and look up the latest versions before adding a dependency. | none | [◐](https://github.com/arvindand/maven-tools-mcp) | 🆓 No key; free public API with no published quota (fair use). | [docs](https://central.sonatype.org/search/rest-api-guide/) |
| [PagerDuty API](https://developer.pagerduty.com)
⭐⭐⭐⭐⭐ **4.7**/5 · [44 reviews](https://sourceforge.net/software/product/PagerDuty/ "SourceForge")
[](https://www.npmjs.com/package/@pagerduty/pdjs) [](https://pypi.org/project/pagerduty/) [](https://stackoverflow.com/questions/tagged/pagerduty) [](https://github.com/PagerDuty/api-schema) [](https://github.com/PagerDuty/api-schema/issues) | An agent can create/manage incidents, on-call schedules, escalation policies, and services via REST. | API key / OAuth | [✅](https://mcp.pagerduty.com/mcp) | 🆓 free plan for up to 5 users: 100 monthly SMS/phone notifications, 1 on-call schedule, 1 escalation policy, API access | [docs](https://developer.pagerduty.com) |
| [Postman API](https://www.postman.com/postman/postman-public-workspace/)
⭐⭐⭐⭐⭐ **4.8**/5 · [24 reviews](https://sourceforge.net/software/product/Postman/ "SourceForge") | An agent can manage Postman collections, workspaces, environments, mocks, monitors, and API specs via REST. | API key | [✅](https://mcp.postman.com/mcp) | 🆓 Free plan: 10,000 Postman API calls/month; rate limits ~300 req/min general, stricter for specific endpoints | [docs](https://learning.postman.com/api-docs/api-reference/) |
| [Reflag Management API](https://reflag.com)
[](https://www.npmjs.com/package/@reflag/node-sdk) | Lets an agent create feature flags, change their targeting for users and companies, and evaluate flags at runtime. | API key / OAuth | [✅](https://app.reflag.com/api/mcp) | 🆓 Free Starter plan: 1,000 monthly tracked users, unlimited seats, 3 environments; no overage (upgrade required) | [docs](https://docs.reflag.com/api/reflag-rest-api) |
| [Sentry API](https://docs.sentry.io/api/)
[](https://www.npmjs.com/package/@sentry/node) [](https://pypi.org/project/sentry-sdk/) [](https://stackoverflow.com/questions/tagged/sentry) [](https://github.com/getsentry/sentry-javascript/issues) | An agent can query and triage error/performance issues and manage projects, releases, and org data. | API key / OAuth | [✅](https://mcp.sentry.dev/mcp) | 🆓 free Developer plan: 1 user, 5,000 errors/mo, 5GB logs, 50 replays; includes MCP access | [docs](https://docs.sentry.io/api/) |
| [Supabase Management API](https://supabase.com/docs/reference/api) | An agent can programmatically create and manage Supabase projects, databases, API keys, and config. | API key / OAuth | [✅](https://mcp.supabase.com/mcp) | 🆓 free plan available; rate limit 120 req/min per user/project (lower for heavier endpoints) | [docs](https://supabase.com/docs/reference/api) |
## Cloud and hosting
*Cloud providers, serverless and edge platforms, and site hosting an agent can deploy to and manage.* — 11 services. JSON: [`catalog/cloud-hosting.json`](catalog/cloud-hosting.json)
| Service | What an agent can do | Auth | MCP | Free tier | Docs |
|---|---|---|:-:|---|---|
| [AWS APIs](https://aws.amazon.com)
[](https://www.npmjs.com/package/@aws-sdk/client-s3) [](https://stackoverflow.com/questions/tagged/amazon-web-services) [](https://github.com/aws/aws-sdk-js-v3/issues) | An agent can provision and control thousands of AWS resources (compute, storage, databases, ML) via SDKs/CLI/REST. | cloud IAM | [✅](https://aws-mcp.us-east-1.api.aws/mcp) | 🆓 Free tier: 30+ services always free within monthly limits; new accounts also get up to $200 one-time credits ($100 on signup + up to $100 earned) usable over 6 months | [docs](https://docs.aws.amazon.com/general/latest/gr/aws-apis-references.html) |
| [Azure APIs](https://learn.microsoft.com/rest/api/azure/)
[](https://github.com/Azure/azure-rest-api-specs) [](https://github.com/microsoft/mcp) [](https://github.com/Azure/azure-rest-api-specs/issues) | An agent can deploy and manage Azure resources (compute, storage, databases, AI) across resource-provider REST APIs. | cloud IAM | [✅](https://github.com/microsoft/mcp) | 🆓 12 months of select free services plus $200 credit for 30 days for new accounts; many services also have a permanent always-free monthly amount | [docs](https://learn.microsoft.com/rest/api/azure/) |
| [Cloudflare API](https://developers.cloudflare.com/api/)
⭐⭐⭐⭐⭐ **4.5**/5 · [12 reviews](https://sourceforge.net/software/product/Cloudflare/ "SourceForge")
[](https://www.npmjs.com/package/cloudflare) [](https://pypi.org/project/cloudflare/) [](https://stackoverflow.com/questions/tagged/cloudflare) [](https://github.com/cloudflare/cloudflare-typescript/issues) | An agent can manage DNS, Workers, zones, WAF/security rules, and caching for Cloudflare accounts programmatically. | API key / OAuth | [✅](https://developers.cloudflare.com/agents/model-context-protocol/mcp-servers-for-cloudflare/) | 🆓 free with any Cloudflare account; API access itself is free, manages both free and paid Cloudflare products | [docs](https://developers.cloudflare.com/api/) |
| [Easypanel](https://easypanel.io/) | Lets an agent discover Easypanel server-management procedures and execute queries, mutations and destructive operations using the selected user’s permissions. | API key | ✅ | 🆓 free tier: 3 projects with unlimited services and deployments; self-hosted server costs are separate | [docs](https://easypanel.io/docs/mcp) |
| [Fly.io Machines API](https://fly.io/docs/machines/api/) | An agent can create, start, stop, and destroy Fly.io Machines (lightweight VMs) programmatically via REST. | API key | [✅](https://docs.fly.io/model-context-protocol/flyctl-server) | Trial: 2 machine-hours or 7 days, whichever comes first, no card needed to start (adding a card ends the trial); then pay-as-you-go, no perpetual free tier | [docs](https://docs.fly.io/machines/api) |
| [Google Cloud APIs](https://cloud.google.com/apis) | An agent can create and manage Google Cloud resources (compute, storage, data, AI/ML) via REST, gRPC, or client libraries. | cloud IAM | [✅](https://docs.cloud.google.com/mcp/supported-products) | 🆓 free trial credit for new customers plus an Always Free tier with perpetual no-cost limits on select products | [docs](https://cloud.google.com/apis/docs/overview) |
| [Mux Video API](https://www.mux.com)
[](https://www.npmjs.com/package/@mux/mux-node) [](https://pypi.org/project/mux_python/) [](https://github.com/muxinc/mux-ts/issues) | Upload, encode, stream and analyse video; get playback URLs, thumbnails and captions via REST. | API key | [✅](https://mcp.mux.com) | 🆓 first 100,000 delivered minutes/month free, then usage-based | [docs](https://www.mux.com/docs) |
| [Netlify API](https://docs.netlify.com/api/get-started/)
⭐⭐⭐⭐ **4.0**/5 · [5 reviews](https://sourceforge.net/software/product/Netlify/ "SourceForge") | An agent can create/manage sites, trigger and monitor deploys, and configure DNS, domains, and env vars. | API key / OAuth | [✅](https://netlify-mcp.netlify.app/mcp) | 🆓 Free: $0 forever plan with 300 credits per month (hard limit, no rollover); API usage subject to account plan limits | [docs](https://docs.netlify.com/api-and-cli-guides/api-guides/get-started-with-api/) |
| [Render API](https://render.com/docs/api) | An agent can create and manage Render services, trigger deployments, and configure databases and env vars. | API key | [✅](https://mcp.render.com/mcp) | 🆓 free static sites; free web services that spin down after inactivity | [docs](https://api-docs.render.com/reference/introduction) |
| [Tencent EdgeOne Pages (Makers)](https://pages.edgeone.ai) | Lets an agent deploy HTML pages, static sites and full-stack apps with edge functions to EdgeOne and get back a public URL. | API key | [✅](https://mcp-on-edge.edgeone.app/mcp-server) | 🆓 Free plan (stated as permanent): 40 projects, 500 builds/month, 3M Edge Function and 1M Cloud Function invocations/month, 5 GB storage, 1 GB KV, 1 GB Blob. | [docs](https://pages.edgeone.ai/document/mcp) |
| [Vercel API](https://vercel.com/docs/rest-api)
⭐⭐⭐⭐⭐ **4.5**/5 · [2 reviews](https://sourceforge.net/software/product/Vercel/ "SourceForge")
[](https://www.npmjs.com/package/@vercel/sdk) [](https://github.com/vercel/sdk/issues) | An agent can create deployments, manage projects/domains/env vars, and query analytics and logs. | API key / OAuth | [✅](https://mcp.vercel.com) | 🆓 free on Hobby plan; some resources/endpoints require Pro/paid plan | [docs](https://vercel.com/docs/rest-api) |
## Databases
*Managed SQL, NoSQL, key-value and analytics databases an agent can create, query and manage.* — 12 services. JSON: [`catalog/databases.json`](catalog/databases.json)
| Service | What an agent can do | Auth | MCP | Free tier | Docs |
|---|---|---|:-:|---|---|
| [ClickHouse Cloud](https://clickhouse.com)
⭐⭐⭐⭐⭐ **5.0**/5 · [1 review](https://sourceforge.net/software/product/ClickHouse/ "SourceForge")
[](https://www.npmjs.com/package/@clickhouse/client) [](https://pypi.org/project/clickhouse-connect/) [](https://stackoverflow.com/questions/tagged/clickhouse) [](https://github.com/ClickHouse/mcp-clickhouse) [](https://github.com/ClickHouse/clickhouse-connect/issues) | Run SQL analytics queries and manage Cloud services/backups via REST API or official MCP server. | API key | [✅](https://github.com/ClickHouse/mcp-clickhouse) | no permanent free tier; 30-day trial with $300 credits | [docs](https://clickhouse.com/docs/products/cloud/features/admin-features/api/api-overview) |
| [Convex](https://www.convex.dev)
[](https://www.npmjs.com/package/convex) [](https://pypi.org/project/convex/) [](https://stackoverflow.com/questions/tagged/convex) [](https://github.com/convex/convex-backend) [](https://github.com/convex/convex-backend/issues) | Introspect tables/functions, call functions, and read/write data in a reactive database via MCP or client SDKs. | API key | [✅](https://github.com/get-convex/convex-backend) | 🆓 generous free tier for small apps, zero cost/maintenance | [docs](https://docs.convex.dev/ai/convex-mcp-server) |
| [Google BigQuery](https://cloud.google.com/bigquery)
[](https://www.npmjs.com/package/@google-cloud/bigquery) [](https://pypi.org/project/google-cloud-bigquery/) [](https://stackoverflow.com/questions/tagged/google-bigquery) [](https://github.com/googleapis/google-cloud-python/issues) [](https://smithery.ai/servers/bigquery) | Run SQL queries and inspect datasets/tables in BigQuery via REST API or the fully-managed remote MCP server. | cloud IAM | [✅](https://bigquery.googleapis.com/mcp) | 🆓 Free tier: 1 TiB of querying and 10 GiB of storage per month | [docs](https://docs.cloud.google.com/bigquery/docs/reference/mcp) |
| [MongoDB Atlas](https://www.mongodb.com/atlas)
⭐⭐⭐⭐⭐ **5.0**/5 · [1 review](https://sourceforge.net/software/product/MongoDB-Atlas/ "SourceForge")
[](https://www.npmjs.com/package/mongodb) [](https://pypi.org/project/pymongo/) [](https://stackoverflow.com/questions/tagged/mongodb-atlas) [](https://github.com/mongodb-js/mongodb-mcp-server) [](https://github.com/mongodb-js/mongodb-mcp-server/issues) | Create/manage Atlas clusters and query MongoDB data via Admin API, drivers, or official MCP server. | API key / OAuth | [✅](https://github.com/mongodb-js/mongodb-mcp-server) | 🆓 free tier: M0 cluster free forever (512MB) | [docs](https://www.mongodb.com/docs/atlas/api/atlas-admin-api-ref/) |
| [Neon Postgres](https://neon.com)
[](https://www.npmjs.com/package/@neondatabase/api-client) [](https://github.com/neondatabase/mcp-server-neon) [](https://github.com/neondatabase/mcp-server-neon/issues) | Provision and manage serverless Postgres projects/branches and run SQL via REST API or MCP server. | API key / OAuth | [✅](https://github.com/neondatabase/mcp-server-neon) | 🆓 Free tier: 100 projects; 0.5 GB storage, 100 CU-hours and 5 GB egress per project per month, no card required | [docs](https://neon.com/docs/reference/api) |
| [PlanetScale](https://planetscale.com)
[](https://www.npmjs.com/package/@planetscale/database) [](https://stackoverflow.com/questions/tagged/planetscale) [](https://github.com/planetscale/database-js/issues) [](https://smithery.ai/servers/planetscale) | Manage MySQL databases, branches, and schema, and view Insights via hosted MCP server or API. | API key / OAuth | [✅](https://mcp.pscale.dev/mcp/planetscale) | Paid only: no free or Hobby plan; cheapest is Postgres PS-5 single node at $5/month | [docs](https://planetscale.com/docs/connect/mcp) |
| [Snowflake](https://www.snowflake.com)
⭐⭐⭐⭐⭐ **4.8**/5 · [4 reviews](https://sourceforge.net/software/product/Snowflake/ "SourceForge")
[](https://www.npmjs.com/package/snowflake-sdk) [](https://pypi.org/project/snowflake-connector-python/) [](https://stackoverflow.com/questions/tagged/snowflake-cloud-data-platform) [](https://github.com/snowflakedb/snowflake-connector-nodejs/issues) | Run SQL, Cortex Analyst, and Cortex Search over warehoused data via REST API or managed MCP server. | API key / OAuth | [✅](https://docs.snowflake.com/en/user-guide/snowflake-cortex/cortex-agents-mcp) | trial credits (no permanent free tier); check pricing | [docs](https://docs.snowflake.com/en/user-guide/snowflake-cortex/cortex-agents-mcp) |
| [Supabase](https://supabase.com)
[](https://www.npmjs.com/package/@supabase/supabase-js) [](https://pypi.org/project/supabase/) [](https://stackoverflow.com/questions/tagged/supabase) [](https://github.com/supabase/supabase-js/issues) [](https://smithery.ai/servers/Supabase) | Manage Postgres tables, auth, storage, and edge functions via REST/GraphQL APIs or client SDKs. | API key / OAuth | [✅](https://mcp.supabase.com/mcp) | 🆓 free tier: 2 projects, 500MB DB, 5GB bandwidth | [docs](https://supabase.com/docs/guides/api) |
| [TiDB Cloud API (Starter)](https://www.pingcap.com/tidb/cloud/)
[](https://stackoverflow.com/questions/tagged/tidb) [](https://github.com/pingcap/pytidb) [](https://github.com/pingcap/pytidb/issues) | Lets an agent create and manage serverless MySQL-compatible TiDB clusters and run SQL, full-text and vector search queries against them. | API key | [✅](https://github.com/pingcap/pytidb) | 🆓 Free: up to 5 Starter instances per org, 25 GiB row storage + 25 GiB columnar storage + 250M Request Units per month in total; no credit card | [docs](https://docs.pingcap.com/api/tidb-cloud-api-overview/) |
| [Tinybird API](https://www.tinybird.co) | Lets an agent ingest events into real-time ClickHouse-based data sources, run SQL queries and call published analytics API endpoints. | API key | [✅](https://mcp.tinybird.co?token=TINYBIRD_TOKEN) | 🆓 Free plan: 10 GB storage, 1,000 API requests/day, 0.25 vCPU shared; no credit card | [docs](https://www.tinybird.co/docs/api-reference) |
| [Turso](https://turso.tech)
[](https://www.npmjs.com/package/@tursodatabase/api) [](https://github.com/tursodatabase/libsql-client-ts/issues) | Create and query edge SQLite (libSQL) databases programmatically via HTTP/SDK client libraries. | API key | [✅](https://mcp.turso.ai/mcp) | 🆓 Free tier: 100 databases, 5 GB storage, 500M rows read and 10M rows written per month, no card required | [docs](https://docs.turso.tech) |
| [Upstash (Redis, Vector)](https://upstash.com)
[](https://www.npmjs.com/package/@upstash/redis) [](https://www.npmjs.com/package/@upstash/vector) [](https://pypi.org/project/upstash-redis/) [](https://pypi.org/project/upstash-vector/) [](https://github.com/upstash/redis-js/issues) | Call serverless Redis, Vector, and QStash over HTTP REST API from edge/serverless runtimes. | API key | [✅](https://mcp.upstash.com/mcp) | 🆓 Free tier: Redis 256MB/500K cmds per month; Vector 10K queries+updates per day (max 200M vectors x dimensions, 1,536 dims) | [docs](https://upstash.com/docs/redis/overall/getstarted) |
## Vector search, memory and RAG
*Vector databases, retrieval (RAG) services and long-term memory layers for agents.* — 9 services. JSON: [`catalog/databases-vector-memory.json`](catalog/databases-vector-memory.json)
| Service | What an agent can do | Auth | MCP | Free tier | Docs |
|---|---|---|:-:|---|---|
| [Agentset RAG API](https://agentset.ai/)
[](https://www.npmjs.com/package/agentset) [](https://pypi.org/project/agentset/) | Lets an agent ingest documents into managed RAG namespaces and run semantic search or cited question answering over them. | API key | [✅](https://docs.agentset.ai/production/mcp-server) | 🆓 Free plan (forever): 1,000 pages ingested and 10,000 retrievals per month, 60 requests/min per namespace | [docs](https://docs.agentset.ai/api-reference/introduction) |
| [Chroma Cloud](https://www.trychroma.com)
[](https://www.npmjs.com/package/chromadb) [](https://pypi.org/project/chromadb/) [](https://github.com/chroma-core/chroma-mcp) [](https://github.com/chroma-core/chroma/issues) | Create databases and store/query vector embeddings for retrieval via REST/SDK or MCP server. | API key | [✅](https://github.com/chroma-core/chroma-mcp) | Trial: Starter plan $0/month base with $5 one-time free credits on signup, then usage-based pricing | [docs](https://docs.trychroma.com) |
| [Letta](https://www.letta.com)
[](https://www.npmjs.com/package/@letta-ai/letta-client) [](https://pypi.org/project/letta-client/) | Create and run stateful agents with persistent memory blocks via REST API or hosted MCP server. | API key | [✅](https://api.letta.com/mcp) | 🆓 Free: $0/month plan with up to 3 stateful agents and limited Letta Auto usage (bring your own API keys); API plan $20/month + usage | [docs](https://docs.letta.com) |
| [Mem0](https://mem0.ai)
[](https://www.npmjs.com/package/mem0ai) [](https://github.com/mem0ai/mem0/issues) | Add, search, update, and delete long-term agent memories via REST API or hosted MCP server. | API key | [✅](https://mcp.mem0.ai/mcp/) | 🆓 free (Hobby) tier: 10K add requests, 1K retrievals/mo, 1 project | [docs](https://docs.mem0.ai) |
| [Pinecone](https://www.pinecone.io)
[](https://www.npmjs.com/package/@pinecone-database/pinecone) [](https://pypi.org/project/pinecone/) [](https://stackoverflow.com/questions/tagged/pinecone) [](https://github.com/pinecone-io/pinecone-mcp) [](https://github.com/pinecone-io/python-sdk/issues) | Upsert, query, and rerank vector embeddings in managed indexes via REST/SDK or MCP server. | API key | [✅](https://github.com/pinecone-io/pinecone-mcp) | 🆓 free tier (Starter plan, limited pods/reads) | [docs](https://docs.pinecone.io/guides/operations/mcp-server) |
| [Qdrant Cloud](https://qdrant.tech)
[](https://www.npmjs.com/package/@qdrant/js-client-rest) [](https://pypi.org/project/qdrant-client/) [](https://stackoverflow.com/questions/tagged/qdrant) [](https://github.com/qdrant/mcp-server-qdrant) [](https://github.com/qdrant/qdrant-client/issues) | Create clusters and store/search vector embeddings via REST/gRPC API, SDKs, or official MCP server. | API key | [✅](https://github.com/qdrant/mcp-server-qdrant) | 🆓 Free tier: single-node cluster with 0.5 vCPU, 1 GB RAM, 4 GB disk, no card; suspends after 1 week idle | [docs](https://qdrant.tech/documentation/cloud/create-cluster/) |
| [Weaviate Cloud](https://weaviate.io)
[](https://www.npmjs.com/package/weaviate-client) [](https://pypi.org/project/weaviate-client/) [](https://stackoverflow.com/questions/tagged/weaviate) [](https://github.com/weaviate/mcp-server-weaviate) [](https://github.com/weaviate/weaviate-python-client/issues) | Store and semantically search vector objects in a managed cluster via REST/GraphQL or MCP server. | API key | [✅](https://github.com/weaviate/mcp-server-weaviate) | 🆓 Free: always-free plan, 1 cluster, 100,000 objects, 1 GB memory, 10 GB disk, 1 collection, no card required | [docs](https://docs.weaviate.io/weaviate) |
| [Zep](https://www.getzep.com)
[](https://www.npmjs.com/package/@getzep/zep-cloud) [](https://pypi.org/project/zep-cloud/) [](https://github.com/getzep/zep-python/issues) | Store and retrieve temporal knowledge-graph agent memory via REST API or a single MCP endpoint. | API key | [✅](https://help.getzep.com/memory-mcp-server) | 🆓 Free tier: 10,000 credits per month, no rollover; variable rate limits | [docs](https://help.getzep.com/memory-mcp-server) |
| [Zilliz Cloud (Milvus)](https://zilliz.com)
[](https://www.npmjs.com/package/@zilliz/milvus2-sdk-node) [](https://pypi.org/project/pymilvus/) [](https://stackoverflow.com/questions/tagged/milvus) [](https://github.com/zilliztech/zilliz-mcp-server) [](https://github.com/milvus-io/pymilvus/issues) | Manage Milvus clusters and perform vector search/ingestion via REST API, SDKs, or MCP server. | API key | [✅](https://github.com/zilliztech/zilliz-mcp-server) | 🆓 Free tier: serverless cluster, 5GB storage, 2.5M vCUs per month, up to 5 collections, no card; plus up to $200 one-time trial credits ($100 on signup + $100 on adding a card) | [docs](https://docs.zilliz.com/docs/get-started) |
## Email, team chat and notifications
*Send and receive email, post to team chat (Slack, Discord), send push notifications; manage meetings.* — 10 services. JSON: [`catalog/communication-email-chat.json`](catalog/communication-email-chat.json)
| Service | What an agent can do | Auth | MCP | Free tier | Docs |
|---|---|---|:-:|---|---|
| [AgentMail](https://www.agentmail.to)
[](https://www.npmjs.com/package/agentmail) [](https://pypi.org/project/agentmail/) | Programmatically create inboxes and send/receive email autonomously, purpose-built for AI agents. | API key | [✅](https://mcp.agentmail.to/mcp) | 🆓 Free: 3 inboxes, 3,000 emails/month (max 100/day), 3GB storage, no card required | [docs](https://docs.agentmail.to) |
| [Discord API](https://discord.com/developers/docs)
[](https://apps.apple.com/us/app/discord-talk-play-hang-out/id985746746) [](https://stackoverflow.com/questions/tagged/discord) [](https://github.com/SaseQ/discord-mcp) [](https://github.com/SaseQ/discord-mcp/issues) [](https://smithery.ai/servers/discord) | Send messages, manage channels/roles, and build interactive bots via REST and Gateway API. | API key / OAuth | [◐](https://github.com/SaseQ/discord-mcp) | 🆓 free, no key needed beyond creating a bot application | [docs](https://docs.discord.com/developers/intro) |
| [Mailgun](https://www.mailgun.com)
⭐ **1.0**/5 · [1 review](https://sourceforge.net/software/product/Mailgun/ "SourceForge")
[](https://www.npmjs.com/package/mailgun.js) [](https://pypi.org/project/mailgun/) [](https://stackoverflow.com/questions/tagged/mailgun) [](https://github.com/mailgun/mailgun-mcp-server) [](https://github.com/mailgun/mailgun.js/issues) | Send and validate transactional email via REST API and SMTP relay with webhooks. | API key | [✅](https://github.com/mailgun/mailgun-mcp-server) | 🆓 free: 100 emails/day; 30-day free trial on paid tiers | [docs](https://documentation.mailgun.com/docs/mailgun/api-reference/intro/) |
| [ntfy.sh Push Notifications API](https://ntfy.sh)
[](https://apps.apple.com/us/app/ntfy/id1625396347) [](https://github.com/gitmotion/ntfy-me-mcp) [](https://github.com/gitmotion/ntfy-me-mcp/issues) | Lets an agent send push notifications to a user's phone or desktop by publishing a plain HTTP POST to an ntfy topic, and read messages back from it. | none | [◐](https://github.com/gitmotion/ntfy-me-mcp) | 🆓 No key; anonymous publishing to public topics, rate-limited per visitor IP (burst of 60 requests, then 1 request every 5 s, roughly 17,280/day); paid plans from $6/month add reserved topics, higher limits, email and phone-call notifications. | [docs](https://docs.ntfy.sh/publish/) |
| [Postmark](https://postmarkapp.com)
[](https://www.npmjs.com/package/postmark) [](https://stackoverflow.com/questions/tagged/postmark) [](https://github.com/ActiveCampaign/postmark-mcp) [](https://github.com/ActiveCampaign/postmark.js/issues) | Send transactional email via REST API with delivery tracking, bounce handling, and templates. | API key | [✅](https://github.com/ActiveCampaign/postmark-mcp) | 🆓 free: 100 emails/month (Developer plan, no expiry) | [docs](https://postmarkapp.com/developer/api/overview) |
| [Resend](https://resend.com)
⭐⭐⭐⭐ **4.0**/5 · [1 review](https://sourceforge.net/software/product/Resend/ "SourceForge")
[](https://www.npmjs.com/package/resend) [](https://pypi.org/project/resend/) [](https://github.com/resend/resend-node/issues) | Send transactional and marketing email via REST API with templates, domains, and webhooks. | API key | [✅](https://mcp.resend.com/mcp) | 🆓 free tier: 3,000 emails/mo, 100/day | [docs](https://resend.com/docs/api-reference/introduction) |
| [SendGrid (Twilio)](https://sendgrid.com)
⭐⭐⭐⭐ **3.9**/5 · [8 reviews](https://sourceforge.net/software/product/SendGrid/ "SourceForge")
[](https://www.npmjs.com/package/@sendgrid/mail) [](https://pypi.org/project/sendgrid/) [](https://stackoverflow.com/questions/tagged/sendgrid) [](https://github.com/sendgrid/sendgrid-nodejs/issues) | Send transactional and marketing email via REST/SMTP API with templates and analytics. | API key | — | Trial: 100 emails/day for 60 days, no card required; paid plan after | [docs](https://www.twilio.com/docs/sendgrid/api-reference/how-to-use-the-sendgrid-v3-api/authentication) |
| [Slack API](https://api.slack.com)
⭐⭐⭐⭐⭐ **4.6**/5 · [250 reviews](https://sourceforge.net/software/product/Slack/ "SourceForge")
[](https://apps.apple.com/us/app/slack/id618783545) [](https://www.npmjs.com/package/@slack/web-api) [](https://pypi.org/project/slack_sdk/) [](https://stackoverflow.com/questions/tagged/slack-api) [](https://github.com/slackapi/node-slack-sdk/issues) | Post messages, manage channels, and read conversation history in Slack via the Web API. | OAuth 2.0 | [✅](https://mcp.slack.com/mcp) | 🆓 free, no key needed beyond creating a Slack app/workspace | [docs](https://docs.slack.dev/reference/methods) |
| [Stream (GetStream) Chat & Video API](https://getstream.io)
[](https://www.npmjs.com/package/stream-chat) [](https://www.npmjs.com/package/@stream-io/node-sdk) [](https://pypi.org/project/stream-chat/) [](https://pypi.org/project/getstream/) [](https://stackoverflow.com/questions/tagged/getstream-io) [](https://github.com/GetStream/stream-chat-js/issues) | Build and moderate in-app chat and video with REST/SDK APIs, channels, and real-time messaging. | API key | — | 🆓 Free tier: Build plan with 1,000 MAU/month and 100 concurrent connections, no card; Maker account gives $100/month credit for teams under 5 people and under $10k monthly revenue | [docs](https://getstream.io/chat/docs/) |
| [Zoom API](https://developers.zoom.us)
[](https://apps.apple.com/us/app/zoom-workplace/id546505307) [](https://stackoverflow.com/questions/tagged/zoom-sdk) | Schedule, update, and manage meetings, webinars, and cloud recordings programmatically via REST API. | OAuth 2.0 | [✅](https://mcp.zoom.us/mcp/zoom/streamable) | 🆓 usable on free Zoom account within Basic plan limits; some endpoints require paid plan | [docs](https://developers.zoom.us/docs/api/) |
## SMS and messaging apps
*Send and receive SMS and messages on WhatsApp, LINE or Telegram through a messaging provider's API.* — 10 services. JSON: [`catalog/sms-messaging.json`](catalog/sms-messaging.json)
| Service | What an agent can do | Auth | MCP | Free tier | Docs |
|---|---|---|:-:|---|---|
| [AWS End User Messaging SMS](https://aws.amazon.com/end-user-messaging/)
[](https://www.npmjs.com/package/@aws-sdk/client-pinpoint-sms-voice-v2) [](https://github.com/aws/aws-sdk-js-v3/issues) | Send SMS, MMS and voice messages and manage sender numbers, opt-outs and registrations via the AWS SMS and Voice v2 API. | cloud IAM | [✅](https://aws-mcp.us-east-1.api.aws/mcp) | Paid only; US SMS $0.00774/message + $0.00421 carrier fee (10DLC or toll-free) | [docs](https://docs.aws.amazon.com/pinpoint/latest/apireference_smsvoicev2/Welcome.html) |
| [Bird (formerly MessageBird)](https://bird.com)
[](https://www.npmjs.com/package/messagebird) [](https://pypi.org/project/messagebird/) [](https://github.com/messagebird/messagebird-nodejs/issues) | Send SMS, email and WhatsApp messages, verify phone numbers and track delivery via REST API or hosted MCP. | API key / OAuth | [✅](https://mcp.bird.com) | Paid only; prepaid wallet, US long code or toll-free $0.0035/SMS + carrier fees | [docs](https://bird.com/docs/api) |
| [LINE Messaging API](https://developers.line.biz/en/services/messaging-api/)
[](https://apps.apple.com/us/app/line/id443904275) [](https://www.npmjs.com/package/@line/bot-sdk) [](https://pypi.org/project/line-bot-sdk/) [](https://stackoverflow.com/questions/tagged/line-api) [](https://github.com/line/line-bot-mcp-server) [](https://github.com/line/line-bot-sdk-python/issues) | Lets an agent send and reply to messages, rich messages and broadcasts to users of a LINE Official Account and read user profiles. | API key | [✅](https://github.com/line/line-bot-mcp-server) | 🆓 Free Communication plan (Japan): 200 push/broadcast messages/month; reply messages are unlimited. Beyond that only paid plans (Light JPY 5,000 for 5,000 messages, Standard JPY 15,000 for 30,000). Free quotas vary by region | [docs](https://developers.line.biz/en/reference/messaging-api/) |
| [Sinch](https://sinch.com)
⭐ **1.0**/5 · [2 reviews](https://sourceforge.net/software/product/Sinch/ "SourceForge")
[](https://www.npmjs.com/package/@sinch/sdk-core) [](https://pypi.org/project/sinch/) [](https://stackoverflow.com/questions/tagged/sinch) [](https://github.com/sinch/sinch-mcp-server) | Send and receive SMS (and WhatsApp, RCS and other channels) via the Conversation REST API. | API key | [✅](https://github.com/sinch/sinch-mcp-server) | Trial: free trial credit and a free test number on signup, no card; then paid (US 10DLC $0.0078/SMS + carrier fees) | [docs](https://developers.sinch.com/docs/conversation/api-reference) |
| [Telegram Bot API](https://core.telegram.org/bots/api)
⭐⭐⭐⭐⭐ **4.7**/5 · [19 reviews](https://sourceforge.net/software/product/Telegram/ "SourceForge")
[](https://apps.apple.com/us/app/telegram-messenger/id686449807) [](https://stackoverflow.com/questions/tagged/telegram-bot) [](https://github.com/chigwell/telegram-mcp) [](https://github.com/chigwell/telegram-mcp/issues) | Send/receive messages, media, and inline interactions via a simple HTTPS bot API. | API key | [◐](https://github.com/chigwell/telegram-mcp) | 🆓 free, no key needed beyond a bot token from @BotFather | [docs](https://core.telegram.org/bots/api) |
| [Telnyx](https://telnyx.com)
⭐⭐⭐⭐⭐ **5.0**/5 · [8 reviews](https://sourceforge.net/software/product/Telnyx/ "SourceForge")
[](https://www.npmjs.com/package/telnyx) [](https://pypi.org/project/telnyx/) [](https://github.com/team-telnyx/telnyx-node/issues) [](https://smithery.ai/servers/telnyx) | Send and receive SMS, MMS, RCS and WhatsApp messages and manage phone numbers via REST API. | API key | [✅](https://api.telnyx.com/v2/mcp) | Trial: $5 test credit, 1 verified number, 100 messages/day; then paid (US 10DLC $0.004/SMS part + carrier fees) | [docs](https://developers.telnyx.com/api-reference/messages/send-a-message) |
| [Textbelt](https://textbelt.com/) | Send an SMS to a phone number (US or international) with one HTTP POST, and check delivery status and remaining credits. | API key | — | 🆓 Free: shared key 'textbelt' sends 1 SMS per day; paid credits are a one-time purchase | [docs](https://docs.textbelt.com/) |
| [Twilio](https://www.twilio.com)
⭐⭐⭐⭐⭐ **4.8**/5 · [13 reviews](https://sourceforge.net/software/product/Twilio/ "SourceForge")
[](https://www.npmjs.com/package/twilio) [](https://pypi.org/project/twilio/) [](https://stackoverflow.com/questions/tagged/twilio) [](https://github.com/twilio-labs/mcp) [](https://github.com/twilio/twilio-node/issues) | Send/receive SMS, WhatsApp messages, and voice calls programmatically via REST API. | API key | [✅](https://github.com/twilio-labs/mcp) | Trial: 100 SMS, 100 WhatsApp, 3,000 emails, 75 voice minutes; no card; one-time, expires after 30 days; SMS only to verified numbers within the signup country, using predefined templates | [docs](https://www.twilio.com/docs/usage/api) |
| [Vonage API](https://developer.vonage.com)
[](https://www.npmjs.com/package/@vonage/server-sdk) [](https://pypi.org/project/vonage/) [](https://stackoverflow.com/questions/tagged/vonage) [](https://github.com/Vonage-Community/vonage-mcp-server-api-bindings) [](https://github.com/Vonage/vonage-node-sdk/issues) | Send SMS, make voice calls, and build video apps via a unified communications REST API. | API key | [✅](https://github.com/Vonage-Community/vonage-mcp-server-api-bindings) | Trial: free credit on signup, no credit card required; then pay-as-you-go per request | [docs](https://developer.vonage.com/en/documentation) |
| [WhatsApp Business Cloud API](https://developers.facebook.com/docs/whatsapp/cloud-api)
⭐⭐⭐⭐ **4.1**/5 · [22 reviews](https://sourceforge.net/software/product/Facebook/ "SourceForge")
[](https://stackoverflow.com/questions/tagged/whatsapp-cloud-api) [](https://github.com/networkerman/whatsapp-cloud-api-mcp-server) | Send/receive WhatsApp messages, template messages, and media programmatically via Graph API. | OAuth 2.0 | [◐](https://github.com/networkerman/whatsapp-cloud-api-mcp-server) | 🆓 Free: non-template (service) messages inside an open 24h customer service window; template messages billed per message (per-message pricing since 2025-07-01) | [docs](https://developers.facebook.com/docs/whatsapp/cloud-api) |
## Voice agents and telephony
*Place and receive phone calls handled by AI voice agents, real-time audio/video rooms.* — 9 services. JSON: [`catalog/voice-agents-telephony.json`](catalog/voice-agents-telephony.json)
| Service | What an agent can do | Auth | MCP | Free tier | Docs |
|---|---|---|:-:|---|---|
| [Bland AI](https://www.bland.ai) | Programmatically create AI phone agents and place/manage automated outbound and inbound calls. | API key | [✅](https://api.bland.ai/v1/mcp) | 🆓 free credits + inbound number on signup (Start plan), no credit card required | [docs](https://docs.bland.ai/api-v1/) |
| [Deepgram Voice Agent API](https://deepgram.com)
[](https://www.npmjs.com/package/@deepgram/sdk) [](https://pypi.org/project/deepgram-sdk/) [](https://stackoverflow.com/questions/tagged/deepgram) [](https://github.com/deepgram/deepgram-python-sdk/issues) | Run a full-duplex speech-to-speech voice agent pipeline (STT+LLM+TTS) over a WebSocket API. | API key | [✅](https://developers.deepgram.com/developer-tools/cli/mcp-server) | $200 free credit on signup | [docs](https://developers.deepgram.com/docs/voice-agent) |
| [ElevenLabs Agents Platform](https://elevenlabs.io/agents)
⭐⭐⭐⭐ **4.0**/5 · [4 reviews](https://sourceforge.net/software/product/ElevenLabs/ "SourceForge")
[](https://www.npmjs.com/package/@elevenlabs/elevenlabs-js) [](https://pypi.org/project/elevenlabs/) [](https://stackoverflow.com/questions/tagged/elevenlabs) [](https://github.com/elevenlabs/elevenlabs-python/issues) | Build and deploy conversational AI voice agents with telephony (SIP/Twilio) integration via API and SDKs. | API key | [✅](https://api.elevenlabs.io/v1/mcp) | 🆓 Free plan: 10k credits/month shared across ElevenLabs products; no commercial license (from Starter, $6/month) | [docs](https://elevenlabs.io/docs/eleven-agents/overview) |
| [LiveKit Cloud](https://livekit.com)
[](https://www.npmjs.com/package/livekit-server-sdk) [](https://pypi.org/project/livekit-api/) [](https://pypi.org/project/livekit/) [](https://stackoverflow.com/questions/tagged/livekit) [](https://github.com/livekit/python-sdks/issues) | Build and deploy real-time voice AI agents with SIP telephony support using LiveKit's server SDKs and APIs. | API key | — | 🆓 free Build plan: 1,000 agent session minutes/mo, 5,000 WebRTC participant minutes/mo, 50GB data transfer | [docs](https://docs.livekit.io/reference/) |
| [Plivo](https://www.plivo.com)
⭐⭐⭐⭐⭐ **5.0**/5 · [1 review](https://sourceforge.net/software/product/Plivo/ "SourceForge")
[](https://www.npmjs.com/package/plivo) [](https://pypi.org/project/plivo/) [](https://stackoverflow.com/questions/tagged/plivo) [](https://github.com/plivo/mcp) [](https://github.com/plivo/plivo-node/issues) | Make and receive voice calls, SIP trunking and AI voice agents via REST API; SMS is available only on the Enterprise plan. | API key | [✅](https://github.com/plivo/mcp) | Trial: free credits for the first 3 weeks on the self-serve Professional plan (voice and SIP only); SMS, MMS and WhatsApp need Enterprise (from $1,000/month) | [docs](https://www.plivo.com/docs/messaging/api/overview) |
| [Retell AI](https://www.retellai.com)
⭐ **1.0**/5 · [1 review](https://sourceforge.net/software/product/Retell-AI/ "SourceForge")
[](https://www.npmjs.com/package/retell-sdk) [](https://pypi.org/project/retell-sdk/) [](https://github.com/RetellAI/retell-typescript-sdk/issues) | Build, deploy, and manage AI voice agents that handle phone and web calls via REST API and SDKs. | API key | [✅](https://mcp.retellai.com) | $10 free credit on signup, then pay-as-you-go ($0.07-$0.31/min for voice) | [docs](https://docs.retellai.com/api-references/overview) |
| [Synthflow API](https://synthflow.ai)
⭐ **1.0**/5 · [1 review](https://sourceforge.net/software/product/Synthflow/ "SourceForge") | Create and manage AI phone voice agents and trigger/manage outbound calls programmatically via REST API. | API key | [✅](https://mcp.synthflow.ai/mcp) | Paid only: Enterprise contracts from $30,000/year; no free plan or self-serve trial listed | [docs](https://docs.synthflow.ai/getting-started-with-your-api) |
| [Twilio Programmable Voice](https://www.twilio.com/en-us/voice)
⭐⭐⭐⭐⭐ **4.8**/5 · [13 reviews](https://sourceforge.net/software/product/Twilio/ "SourceForge")
[](https://www.npmjs.com/package/twilio) [](https://pypi.org/project/twilio/) [](https://stackoverflow.com/questions/tagged/twilio) [](https://github.com/twilio/twilio-oai) [](https://github.com/twilio-labs/mcp) [](https://github.com/twilio/twilio-oai/issues) | Programmatically make, receive, and control phone calls (IVR, recording, conferencing) via REST API. | API key | [✅](https://github.com/twilio-labs/mcp) | Trial: one-time free units (e.g. 75 voice minutes, 100 SMS, 100 WhatsApp, 3,000 emails), no card, expires after 30 days; then pay-as-you-go | [docs](https://www.twilio.com/docs/voice) |
| [Vapi](https://vapi.ai)
[](https://www.npmjs.com/package/@vapi-ai/server-sdk) [](https://pypi.org/project/vapi_server_sdk/) [](https://github.com/VapiAI/server-sdk-typescript/issues) | Create, configure, and run AI voice assistants that make and receive phone calls via REST API. | API key | [✅](https://mcp.vapi.ai/mcp) | $5 free credit on signup, then pay-as-you-go (~$0.05/min platform fee + provider costs) | [docs](https://docs.vapi.ai/api-reference) |
## Productivity and workspace
*Email, calendars, files, notes, tasks and project management.* — 17 services. JSON: [`catalog/productivity-workspace.json`](catalog/productivity-workspace.json)
| Service | What an agent can do | Auth | MCP | Free tier | Docs |
|---|---|---|:-:|---|---|
| [Airtable API](https://airtable.com/developers)
⭐⭐⭐⭐⭐ **4.7**/5 · [28 reviews](https://sourceforge.net/software/product/Airtable/ "SourceForge")
[](https://apps.apple.com/us/app/airtable/id914172636) [](https://www.npmjs.com/package/airtable) [](https://stackoverflow.com/questions/tagged/airtable) [](https://github.com/Airtable/airtable.js/issues) | Read and write records in Airtable bases and tables via REST API. | API key / OAuth | [✅](https://mcp.airtable.com/mcp) | 🆓 Free tier: 1,000 API calls per workspace per month on the Free plan, 5 req/sec per base | [docs](https://airtable.com/developers/web/api/introduction) |
| [Asana API](https://developers.asana.com)
⭐⭐⭐⭐⭐ **4.7**/5 · [97 reviews](https://sourceforge.net/software/product/Asana/ "SourceForge")
[](https://apps.apple.com/us/app/asana-work-management/id489969512) [](https://www.npmjs.com/package/asana) [](https://pypi.org/project/asana/) [](https://stackoverflow.com/questions/tagged/asana-api) [](https://github.com/Asana/node-asana/issues) | Create tasks, projects, and comments in Asana workspaces via REST API. | API key / OAuth | [✅](https://mcp.asana.com/v2/mcp) | 🆓 free tier: API included on Personal (free) plan, rate limited | [docs](https://developers.asana.com) |
| [Atlassian (Jira, Confluence)](https://developer.atlassian.com) | Create and manage Jira issues and Confluence pages via REST API or the official remote MCP server. | OAuth 2.0 | [✅](https://mcp.atlassian.com/v2/mcp) | 🆓 free tier: available on Free Jira/Confluence plans; rate limits vary by plan | [docs](https://developer.atlassian.com) |
| [Box API](https://developer.box.com)
[](https://apps.apple.com/us/app/box-the-power-of-content-ai/id290853822) [](https://www.npmjs.com/package/box-node-sdk) [](https://pypi.org/project/boxsdk/) [](https://pypi.org/project/box-sdk-gen/) [](https://stackoverflow.com/questions/tagged/box-api) [](https://github.com/box/box-python-sdk/issues) | Upload, download, and manage files, folders, and metadata in Box via REST API. | OAuth 2.0 | [✅](https://mcp.box.com) | 🆓 Free: developer plan with 10 GB storage, full API access and 1,000 AI units per month, no payment required | [docs](https://developer.box.com/guides/api-calls/) |
| [Cal.com API](https://cal.com/docs/api-reference)
[](https://apps.apple.com/us/app/cal-com/id6757157271) | Create and manage bookings, event types, and availability via the Cal.com REST API v2. | API key / OAuth | [✅](https://mcp.cal.com/mcp) | 🆓 Free: API keys on any account incl. the free-forever Individuals plan, 120 req/min per key (higher on request); Teams/Orgs endpoints need paid plans | [docs](https://cal.com/docs/api-reference/v2/introduction) |
| [Calendly API](https://developer.calendly.com)
⭐⭐⭐⭐⭐ **4.7**/5 · [14 reviews](https://sourceforge.net/software/product/Calendly/ "SourceForge")
[](https://smithery.ai/servers/calendly) | Programmatically book meetings and read/write scheduling, event, and contact data via REST API v2. | API key / OAuth | [✅](https://mcp.calendly.com) | 🆓 Free: API reads and most writes work on every plan incl. Free (except 3 Enterprise-only endpoints); booking through the Scheduling API (POST /invitees) and webhooks need a paid plan | [docs](https://developer.calendly.com/api-docs) |
| [ClickUp API](https://developer.clickup.com)
⭐⭐⭐⭐⭐ **4.6**/5 · [122 reviews](https://sourceforge.net/software/product/ClickUp/ "SourceForge")
[](https://stackoverflow.com/questions/tagged/clickup-api) | Create and manage ClickUp tasks, lists, and docs via REST API or the official MCP server. | API key / OAuth | [✅](https://mcp.clickup.com/mcp) | 🆓 free tier: API access included on Free Forever plan | [docs](https://developer.clickup.com/reference) |
| [Coda API (Superhuman Docs)](https://coda.io)
⭐⭐⭐⭐⭐ **5.0**/5 · [1 review](https://sourceforge.net/software/product/Superhuman-Docs/ "SourceForge") | Read and write Coda (now 'Superhuman Docs') documents, tables, and rows via REST API or an MCP server. | API key | [✅](https://docs.superhuman.com/apis/mcp) | 🆓 free, included for all users on both free and paid workspaces | [docs](https://docs.superhuman.com/developers/apis/v1) |
| [Dropbox API](https://www.dropbox.com/developers)
⭐⭐⭐⭐⭐ **4.5**/5 · [226 reviews](https://sourceforge.net/software/product/Dropbox/ "SourceForge")
[](https://apps.apple.com/us/app/dropbox-cloud-storage-backup/id327630330) [](https://www.npmjs.com/package/dropbox) [](https://pypi.org/project/dropbox/) [](https://stackoverflow.com/questions/tagged/dropbox-api) [](https://github.com/dropbox/dropbox-sdk-js/issues) | Upload, download, and manage files and folders in Dropbox via the HTTP REST API. | OAuth 2.0 | [✅](https://mcp.dropbox.com/mcp) | 🆓 free tier: API access included on Basic (free) plan, rate limited | [docs](https://www.dropbox.com/developers/documentation/http/documentation) |
| [Google Workspace APIs (Gmail, Calendar, Drive)](https://developers.google.com/workspace)
[](https://stackoverflow.com/questions/tagged/google-api) | Read/write Gmail messages, Calendar events, and Drive files programmatically via REST APIs. | OAuth 2.0 | [✅](https://developers.google.com/workspace/guides/configure-mcp-servers) | 🆓 Free: no charge within per-API daily quotas; Google plans to bill quota overages to the Cloud billing account later in 2026 | [docs](https://developers.google.com/workspace) |
| [Linear API](https://linear.app/developers)
⭐⭐⭐⭐⭐ **5.0**/5 · [1 review](https://sourceforge.net/software/product/Linear/ "SourceForge")
[](https://www.npmjs.com/package/@linear/sdk) [](https://github.com/linear/linear/issues) | Create, query, and update Linear issues, projects, and comments via GraphQL API or the official MCP server. | API key / OAuth | [✅](https://mcp.linear.app/mcp) | 🆓 free tier: API access included on Free plan (rate limited) | [docs](https://linear.app/developers) |
| [Microsoft Graph (Outlook, Teams, OneDrive)](https://learn.microsoft.com/graph/)
[](https://www.npmjs.com/package/@microsoft/microsoft-graph-client) [](https://pypi.org/project/msgraph-sdk/) [](https://stackoverflow.com/questions/tagged/microsoft-graph-api) [](https://github.com/microsoftgraph/msgraph-sdk-javascript/issues) | Single REST endpoint to read/write Outlook mail, Calendar events, Teams, and OneDrive/SharePoint data. | OAuth 2.0 | [✅](https://mcp.svc.cloud.microsoft/enterprise) | 🆓 Free: standard Graph APIs cost nothing beyond the user's Microsoft 365/Entra license (metered APIs are billed); the free M365 E5 developer sandbox is only for qualifying members (Visual Studio Pro/Enterprise subscribers, ISV Success/partners, Premier/Unified support) | [docs](https://learn.microsoft.com/en-us/graph/overview) |
| [monday.com API](https://developer.monday.com)
⭐⭐⭐⭐⭐ **4.8**/5 · [98 reviews](https://sourceforge.net/software/product/monday.com/ "SourceForge")
[](https://www.npmjs.com/package/monday-sdk-js) [](https://stackoverflow.com/questions/tagged/monday.com) [](https://github.com/mondaycom/monday-sdk-js/issues) | Query and update monday.com boards, items, and workflows via GraphQL API or a hosted MCP endpoint. | API key / OAuth | [✅](https://mcp.monday.com/mcp) | 🆓 free tier: GraphQL API included on Free plan (rate limited) | [docs](https://developer.monday.com) |
| [NocoDB Cloud API](https://nocodb.com)
[](https://www.npmjs.com/package/nocodb-sdk) [](https://github.com/nocodb/nocodb/issues) | Lets an agent read, create and update records, tables and views in NocoDB spreadsheet-style databases. | API key / OAuth | [✅](https://app.nocodb.com/mcp) | 🆓 Free plan: 1,000 records, 1 GB storage, 1,000 API calls/month, 3 editors, 100 automation runs; no credit card | [docs](https://nocodb.com/docs/apis-and-mcp) |
| [Notion API](https://developers.notion.com)
⭐⭐⭐⭐⭐ **4.7**/5 · [26 reviews](https://sourceforge.net/software/product/Notion/ "SourceForge")
[](https://apps.apple.com/us/app/notion-notes-tasks-ai/id1232780281) [](https://www.npmjs.com/package/@notionhq/client) [](https://stackoverflow.com/questions/tagged/notion-api) [](https://github.com/makenotion/notion-sdk-js/issues) [](https://smithery.ai/servers/notion) | Read, create, and update Notion pages, databases, and comments via REST API. | API key / OAuth | [✅](https://mcp.notion.com/mcp) | 🆓 free, API access included on all plans (rate limit ~3 req/sec) | [docs](https://developers.notion.com) |
| [Todoist API](https://developer.todoist.com)
⭐⭐⭐⭐⭐ **4.8**/5 · [14 reviews](https://sourceforge.net/software/product/Todoist/ "SourceForge")
[](https://apps.apple.com/us/app/todoist-to-do-list-calendar/id572688855) [](https://www.npmjs.com/package/@doist/todoist-api-typescript) [](https://pypi.org/project/todoist-api-python/) [](https://stackoverflow.com/questions/tagged/todoist) [](https://github.com/Doist/todoist-api-python/issues) | Create, read, and complete Todoist tasks and projects via REST API or the official MCP server. | API key / OAuth | [✅](https://ai.todoist.net/mcp) | 🆓 Free: API usable with any Todoist account; 1,000 partial / 100 full sync requests per 15 min per user; some features follow the user's Todoist plan | [docs](https://developer.todoist.com/api/v1/) |
| [Trello API](https://developer.atlassian.com/cloud/trello/)
[](https://apps.apple.com/us/app/trello-daily-task-tracker/id461504587) [](https://stackoverflow.com/questions/tagged/trello) | Create and manage Trello boards, lists, and cards via REST API. | API key / OAuth | [✅](https://mcp.trello.com/v1) | 🆓 Free: free API key + user token; rate limits 300 req/10 s per API key and 100 req/10 s per token | [docs](https://developer.atlassian.com/cloud/trello/rest/) |
## CRM, support and marketing
*Contacts, deals, support tickets and email campaigns.* — 8 services. JSON: [`catalog/crm-support-marketing.json`](catalog/crm-support-marketing.json)
| Service | What an agent can do | Auth | MCP | Free tier | Docs |
|---|---|---|:-:|---|---|
| [Attio API](https://developers.attio.com)
⭐⭐⭐⭐⭐ **5.0**/5 · [1 review](https://sourceforge.net/software/product/Attio/ "SourceForge")
[](https://apps.apple.com/us/app/attio/id1511545395) | Search, create, and update records, lists, and notes in an Attio CRM workspace via REST API or official MCP. | API key / OAuth | [✅](https://mcp.attio.com/mcp) | 🆓 Free tier: up to 3 seats, 50,000 records, API access included; no card required; 14-day trial of Pro plan | [docs](https://docs.attio.com/) |
| [HubSpot API](https://developers.hubspot.com)
[](https://apps.apple.com/us/app/hubspot/id1107711722) [](https://www.npmjs.com/package/@hubspot/api-client) [](https://pypi.org/project/hubspot-api-client/) [](https://stackoverflow.com/questions/tagged/hubspot) [](https://github.com/HubSpot/hubspot-api-nodejs/issues) | Create/update CRM contacts, deals, companies, and engagements, or send marketing emails, via REST API or remote MCP. | API key / OAuth | [✅](https://mcp.hubspot.com) | 🆓 free CRM account with limited-scope API access; many endpoints require a paid Hub tier (see APIs-by-tier docs) | [docs](https://developers.hubspot.com/docs/api/overview) |
| [Intercom API](https://developers.intercom.com)
⭐⭐⭐⭐⭐ **4.7**/5 · [9 reviews](https://sourceforge.net/software/product/Intercom/ "SourceForge")
[](https://apps.apple.com/us/app/intercom-conversations/id739927601) [](https://www.npmjs.com/package/intercom-client) [](https://pypi.org/project/python-intercom/) [](https://stackoverflow.com/questions/tagged/intercom) [](https://github.com/intercom/intercom-node/issues) | Manage conversations, contacts, companies, and Help Center articles via REST API or Intercom's official remote MCP server. | API key / OAuth | [✅](https://mcp.intercom.com/mcp) | 🆓 free development workspace for building/testing; production use requires a paid Intercom plan | [docs](https://developers.intercom.com/docs/references/rest-api/api.intercom.io) |
| [Klaviyo API](https://developers.klaviyo.com)
⭐⭐⭐⭐⭐ **4.5**/5 · [8 reviews](https://sourceforge.net/software/product/Klaviyo/ "SourceForge")
[](https://www.npmjs.com/package/klaviyo-api) [](https://pypi.org/project/klaviyo-api/) [](https://stackoverflow.com/questions/tagged/klaviyo) [](https://github.com/klaviyo/klaviyo-api-node/issues) | Manage email/SMS marketing profiles, lists, flows, and campaign analytics via Klaviyo's REST API or official MCP server. | API key / OAuth | [✅](https://mcp.klaviyo.com/mcp) | 🆓 free plan up to 250 contacts / 500 email sends per month | [docs](https://developers.klaviyo.com/en/reference/api_overview) |
| [Mailchimp Marketing API](https://mailchimp.com/developer/)
⭐⭐⭐⭐⭐ **4.5**/5 · [130 reviews](https://sourceforge.net/software/product/MailChimp/ "SourceForge")
[](https://apps.apple.com/us/app/mailchimp-email-marketing/id366794783) [](https://www.npmjs.com/package/@mailchimp/mailchimp_marketing) [](https://pypi.org/project/mailchimp-marketing/) [](https://stackoverflow.com/questions/tagged/mailchimp-api-v3.0) [](https://github.com/damientilman/mailchimp-mcp-server) [](https://github.com/damientilman/mailchimp-mcp-server/issues) | Manage email marketing audiences, campaigns, and automation via Mailchimp's Marketing REST API. | API key / OAuth | [◐](https://github.com/damientilman/mailchimp-mcp-server) | 🆓 free plan up to 250 contacts / 500 emails per month (API accessible on free plan) | [docs](https://mailchimp.com/developer/marketing/api/root/) |
| [Pipedrive API](https://developers.pipedrive.com)
⭐⭐⭐⭐ **4.4**/5 · [50 reviews](https://sourceforge.net/software/product/Pipedrive/ "SourceForge")
[](https://apps.apple.com/us/app/pipedrive-sales-crm/id921456160) [](https://www.npmjs.com/package/pipedrive) [](https://stackoverflow.com/questions/tagged/pipedrive-api) [](https://github.com/pipedrive/client-nodejs/issues) | Create and update deals, contacts (persons/organizations), and activities in a Pipedrive CRM pipeline via REST API. | API key / OAuth | [✅](https://mcp.pipedrive.ai/mcp) | no free tier; 14/30-day trial and free developer sandbox account for testing | [docs](https://developers.pipedrive.com/docs/api/v1) |
| [Salesforce APIs](https://developer.salesforce.com)
⭐⭐⭐⭐⭐ **4.7**/5 · [60 reviews](https://sourceforge.net/software/product/Salesforce/ "SourceForge")
[](https://apps.apple.com/us/app/salesforce/id404249815) [](https://stackoverflow.com/questions/tagged/salesforce) | Read and write Salesforce CRM records (leads, opportunities, cases) programmatically via REST, GraphQL, or Bulk API. | OAuth 2.0 | [✅](https://api.salesforce.com/platform/mcp/v1/platform/sobject-all) | 🆓 free Developer Edition org available via signup at developer.salesforce.com/signup | [docs](https://developer.salesforce.com/docs/apis) |
| [Zendesk API](https://developer.zendesk.com)
⭐⭐⭐⭐ **4.3**/5 · [20 reviews](https://sourceforge.net/software/product/Zendesk/ "SourceForge")
[](https://apps.apple.com/us/app/zendesk-support/id1174276185) [](https://stackoverflow.com/questions/tagged/zendesk-api) [](https://github.com/reminia/zendesk-mcp-server) | Create, update, and search support tickets, users, and Help Center articles via Zendesk's REST API. | API key / OAuth | [◐](https://github.com/reminia/zendesk-mcp-server) | Trial: 14-day free trial of Suite Professional, one-time, no credit card required; no free plan, paid plans from $19/agent/mo (Support Team, annual) | [docs](https://developer.zendesk.com/api-reference/) |
## Social media
*Read and publish posts, comments and videos on social platforms.* — 10 services. JSON: [`catalog/social-media.json`](catalog/social-media.json)
| Service | What an agent can do | Auth | MCP | Free tier | Docs |
|---|---|---|:-:|---|---|
| [Ayrshare](https://www.ayrshare.com)
⭐⭐⭐ **3.4**/5 · [5 reviews](https://sourceforge.net/software/product/Ayrshare/ "SourceForge")
[](https://www.npmjs.com/package/social-post-api) [](https://pypi.org/project/social-post-api/) | Unified API to post, schedule, and analyze content across 14+ social networks (X, Instagram, LinkedIn, TikTok, etc.) with one API key. | API key | [✅](https://api.ayrshare.com/mcp) | Trial: one-time 28-day free trial of the Launch plan ($299/mo), no card required; Premium from $149/mo | [docs](https://www.ayrshare.com/docs/apis/overview) |
| [Bluesky / AT Protocol](https://bsky.network/)
[](https://apps.apple.com/us/app/bluesky-social/id6444370199) [](https://www.npmjs.com/package/@atproto/api) [](https://github.com/bluesky-social/atproto/issues) | Post, read, and moderate content on Bluesky via the open, self-hostable AT Protocol REST/XRPC API. | OAuth 2.0 | — | 🆓 free, no key needed for public reads; free account required for posting | [docs](https://bsky.network/) |
| [LinkedIn API](https://learn.microsoft.com/linkedin/)
[](https://apps.apple.com/us/app/linkedin-community-network/id288429040) [](https://stackoverflow.com/questions/tagged/linkedin-api) | Sign users in and share basic posts via OAuth2/OpenID Connect; most other endpoints require partner approval. | OAuth 2.0 | — | check pricing — most scopes require LinkedIn Partner Program approval | [docs](https://learn.microsoft.com/en-us/linkedin/) |
| [Mastodon API](https://docs.joinmastodon.org/api/)
⭐⭐⭐ **2.5**/5 · [11 reviews](https://sourceforge.net/software/product/Mastodon/ "SourceForge")
[](https://apps.apple.com/us/app/mastodon/id1571998974) [](https://stackoverflow.com/questions/tagged/mastodon) | Post statuses, read timelines, and manage accounts on any Mastodon instance via REST API. | OAuth 2.0 | — | 🆓 Free: register an app per instance at no cost; default limit 300 requests per 5 minutes per account | [docs](https://docs.joinmastodon.org/api/) |
| [Meta Graph API (Facebook, Instagram)](https://developers.facebook.com/docs/graph-api)
⭐⭐⭐⭐ **4.1**/5 · [22 reviews](https://sourceforge.net/software/product/Facebook/ "SourceForge")
[](https://apps.apple.com/us/app/facebook/id284882215) [](https://stackoverflow.com/questions/tagged/facebook-graph-api) | Read and publish posts, manage Pages, and access Instagram business content via Meta's Graph API. | OAuth 2.0 | [✅](https://mcp.facebook.com/ads) | 🆓 Free: no fee; platform rate limit 200 calls/hour x app users; most non-trivial permissions need Meta App Review and business verification | [docs](https://developers.facebook.com/docs/graph-api) |
| [Pinterest API](https://developers.pinterest.com)
⭐⭐⭐⭐⭐ **4.7**/5 · [14 reviews](https://sourceforge.net/software/product/Pinterest/ "SourceForge")
[](https://apps.apple.com/us/app/pinterest/id429047995) [](https://stackoverflow.com/questions/tagged/pinterest) | Create pins and boards and read analytics data on Pinterest via REST API v5. | OAuth 2.0 | — | 🆓 Free: new apps get Trial access (1,000 requests/day); Standard access (100 req/s per user per app) requires app review | [docs](https://developers.pinterest.com/docs/api/v5/) |
| [Reddit API](https://www.reddit.com/dev/api)
⭐⭐⭐⭐ **4.2**/5 · [8 reviews](https://sourceforge.net/software/product/Reddit/ "SourceForge")
[](https://apps.apple.com/us/app/reddit/id1064216828) [](https://stackoverflow.com/questions/tagged/reddit) | Read posts/comments and submit posts, comments, or votes on Reddit via OAuth2 REST API. | OAuth 2.0 | — | 🆓 Free: Data API usable within Reddit's rate limits under the Data API Terms; commercial use or research above rate limits needs a separate agreement with Reddit | [docs](https://www.reddit.com/dev/api) |
| [TikTok API](https://developers.tiktok.com)
⭐⭐⭐⭐⭐ **4.7**/5 · [7 reviews](https://sourceforge.net/software/product/TikTok/ "SourceForge")
[](https://apps.apple.com/us/app/tiktok-videos-shop-live/id835599320) | Post videos/drafts and query content on TikTok via the Content Posting and Display OAuth2 REST APIs. | OAuth 2.0 | — | 🆓 Free: no fee; default 600 requests/min per endpoint; app review needed for production, unaudited clients post private-only | [docs](https://developers.tiktok.com) |
| [X (Twitter) API](https://developer.x.com)
[](https://www.npmjs.com/package/twitter-api-sdk) [](https://pypi.org/project/xdk/) [](https://github.com/xdevplatform/twitter-api-typescript-sdk/issues) | Post, search, and read tweets and manage X (Twitter) content via REST API v2. | API key / OAuth | [✅](https://api.x.com/mcp) | Paid only: pay-per-usage with prepaid credits (e.g. $0.005 per Post read, $0.001 per owned read), no subscriptions and no free tier | [docs](https://docs.x.com/x-api/introduction) |
| [YouTube Data API](https://developers.google.com/youtube/v3)
[](https://apps.apple.com/us/app/youtube/id544007664) [](https://stackoverflow.com/questions/tagged/youtube-api) | Search videos, manage playlists/comments, and upload videos to YouTube via REST API. | API key / OAuth | — | 🆓 Free tier: 10,000 quota units/day plus separate caps of 100 search.list and 100 videos.insert calls/day (extendable on request) | [docs](https://developers.google.com/youtube/v3) |
## Maps, geolocation and weather
*Geocoding, routing, places, map tiles and weather forecasts.* — 18 services. JSON: [`catalog/maps-geo-weather.json`](catalog/maps-geo-weather.json)
| Service | What an agent can do | Auth | MCP | Free tier | Docs |
|---|---|---|:-:|---|---|
| [Esri ArcGIS Location Platform](https://location.arcgis.com)
[](https://pypi.org/project/arcgis/) [](https://stackoverflow.com/questions/tagged/arcgis) | Geocode addresses, render maps, run spatial analysis and manage geospatial site data via REST APIs and SDKs. | API key / OAuth | [✅](https://developers.arcgis.com/ai-tools/mcp-arcgis-location-services/) | 🆓 free tier with monthly free credits, then usage-based pricing | [docs](https://developers.arcgis.com/documentation/) |
| [Geoapify](https://www.geoapify.com)
[](https://www.npmjs.com/package/@geoapify/geocoder-autocomplete) [](https://github.com/geoapify/geocoder-autocomplete/issues) | Geocode, search places, and calculate routes/isochrones via REST APIs built on open geodata. | API key | [✅](https://api.geoapify.com/v1/mcp) | 🆓 free tier: 3,000 credits/day (~90,000/month), no card required | [docs](https://apidocs.geoapify.com/) |
| [Google Maps Platform](https://developers.google.com/maps)
⭐⭐⭐⭐⭐ **4.7**/5 · [6 reviews](https://sourceforge.net/software/product/Google-Maps/ "SourceForge")
[](https://apps.apple.com/us/app/google-maps/id585027354) [](https://www.npmjs.com/package/@googlemaps/google-maps-services-js) [](https://pypi.org/project/googlemaps/) [](https://stackoverflow.com/questions/tagged/google-maps-api-3) [](https://github.com/googlemaps/google-maps-services-js/issues) | Geocode addresses, get directions/routes, places data, and static/dynamic maps via REST APIs or Google's remote MCP server. | API key | [✅](https://mapstools.googleapis.com/mcp) | 🆓 Free tier: free calls per SKU per month (10K Essentials, 5K Pro, 1K Enterprise), replacing the former $200 monthly credit | [docs](https://developers.google.com/maps/documentation) |
| [GUGiK Universal Geocoding Service (UUG)](https://services.gugik.gov.pl/uug/) | Geocode a Polish street address to coordinates with official TERYT/SIMC/ULIC codes and postcode, or reverse-geocode a point to the nearest address, via Poland's national geodesy office. | none | — | 🆓 Free, no key: public government geocoding service for Polish addresses, streets, towns, road markers and level crossings | [docs](https://services.gugik.gov.pl/uug/opis.html) |
| [HERE Location Services](https://developer.here.com)
[](https://apps.apple.com/us/app/here-wego-maps-navigation/id955837609) [](https://pypi.org/project/here-location-services/) [](https://stackoverflow.com/questions/tagged/here-api) | Geocode, route, and search places worldwide via REST APIs and SDKs. | API key | ◐ | 🆓 Free: Base plan includes free monthly transactions per service (pay-as-you-grow above); credit card required at signup | [docs](https://www.here.com/docs) |
| [IP2Location.io API](https://www.ip2location.io/)
[](https://www.npmjs.com/package/ip2location-io-nodejs) [](https://pypi.org/project/IP2Location-io/) | Lets an agent geolocate IPv4/IPv6 addresses, get ASN/ISP/proxy data, and look up domain WHOIS records. | API key | [✅](https://mcp.ip2location.io/) | 🆓 Free plan: 50,000 IP geolocation queries/month, 500 domain WHOIS and 50 hosted-domain queries/month (attribution required); keyless: 1,000 queries/day. | [docs](https://www.ip2location.io/ip2location-documentation) |
| [IPLocate IP Intelligence API](https://www.iplocate.io/)
[](https://www.npmjs.com/package/node-iplocate) [](https://github.com/iplocate/mcp-server-iplocate) | Lets an agent geolocate an IP address and get its ASN, ISP, company, abuse contacts and VPN/proxy/Tor/hosting flags. | API key | [✅](https://github.com/iplocate/mcp-server-iplocate) | 🆓 Free plan: 1,000 requests/day forever, all data types (geolocation, VPN/proxy/Tor, ASN, company, abuse contacts), no credit card. | [docs](https://www.iplocate.io/docs) |
| [LocationIQ](https://locationiq.com) | Geocode and reverse-geocode addresses, find nearby places, look up time zones, calculate routes and render map tiles via REST API. | API key | — | 🆓 Free: 5,000 requests/day, 2 requests/s, 60 requests/min, no card; commercial use requires a link back to LocationIQ | [docs](https://docs.locationiq.com/reference/search) |
| [Mapbox](https://www.mapbox.com)
[](https://www.npmjs.com/package/mapbox-gl) [](https://www.npmjs.com/package/@mapbox/mapbox-sdk) [](https://pypi.org/project/mapbox/) [](https://stackoverflow.com/questions/tagged/mapbox) [](https://github.com/mapbox/mapbox-gl-js/issues) | Geocode, route, and render maps/POI search via REST APIs, SDKs, or an official MCP server. | API key | [✅](https://mcp.mapbox.com/mcp) | 🆓 free tier: monthly free quotas per API (e.g. 50,000 map loads/month) | [docs](https://docs.mapbox.com/api/) |
| [National Weather Service API (NWS)](https://www.weather.gov/documentation/services-web-api) | Fetch official US government weather forecasts, alerts, and observations via a free public REST API. | none | ◐ | 🆓 free, no key, no rate-limit tier (fair-use) | [docs](https://www.weather.gov/documentation/services-web-api) |
| [Open-Meteo](https://open-meteo.com)
[](https://www.npmjs.com/package/openmeteo) [](https://pypi.org/project/openmeteo-requests/) [](https://github.com/open-meteo/python-requests/issues) | Fetch weather forecasts, historical weather, and climate data worldwide via a free open REST API, no key required. | none | ◐ | 🆓 No key needed for non-commercial use: 10,000 calls/day, 300,000/month (also 600/min, 5,000/hour) | [docs](https://open-meteo.com/en/docs) |
| [OpenCage Geocoding API](https://opencagedata.com)
[](https://pypi.org/project/opencage/) [](https://github.com/OpenCageData/opencage-geocoding-mcp) [](https://github.com/OpenCageData/python-opencage-geocoder/issues) | Convert addresses and place names to coordinates, and coordinates to addresses, worldwide via REST API. | API key | [✅](https://github.com/OpenCageData/opencage-geocoding-mcp) | 🆓 Free: 2,500 requests/day, 1 request/s, no card (for testing; production needs a paid plan from €45/month) | [docs](https://opencagedata.com/api) |
| [OpenRouteService](https://openrouteservice.org)
[](https://www.npmjs.com/package/openrouteservice-js) [](https://pypi.org/project/openrouteservice/) [](https://github.com/GIScience/openrouteservice-py/issues) | Calculate routes, isochrones, distance matrices, and geocoding over OpenStreetMap data via a free REST API. | API key | ◐ | 🆓 free tier: ~2,000 requests/day (varies by endpoint), signup required | [docs](https://openrouteservice.org/dev/#/api-docs) |
| [OpenStreetMap Nominatim](https://nominatim.org)
[](https://stackoverflow.com/questions/tagged/nominatim) | Geocode and reverse-geocode addresses from OpenStreetMap data via a free public REST API. | none | [◐](https://openstreetmap.caseyjhand.com/mcp) | 🆓 No key needed; public server max 1 request/second, bulk geocoding discouraged (small one-off jobs only, cached), no systematic or autocomplete queries | [docs](https://nominatim.org/release-docs/latest/api/Overview/) |
| [OpenWeatherMap API](https://openweathermap.org/api)
[](https://stackoverflow.com/questions/tagged/openweathermap) | Fetch current weather, forecasts, and historical/air-quality data for any location via a REST API. | API key | [✅](https://mcp.openweathermap.org/mcp) | 🆓 Free tier: 60 calls/min, 1,000,000 calls/month on current weather/forecast | [docs](https://openweathermap.org/api) |
| [Overpass API (OSM)](https://wiki.openstreetmap.org/wiki/Overpass_API)
[](https://stackoverflow.com/questions/tagged/overpass-api) | Run custom queries (Overpass QL) over OpenStreetMap data - POIs, roads, boundaries - via a public read-only API. | none | [◐](https://openstreetmap.caseyjhand.com/mcp) | 🆓 free, no key; public instances are fair-use/rate-limited | [docs](https://wiki.openstreetmap.org/wiki/Overpass_API) |
| [Photon (komoot)](https://photon.komoot.io/)
[](https://github.com/komoot/photon) [](https://github.com/komoot/photon/issues) | Geocode addresses and place names worldwide from OpenStreetMap data with typo-tolerant search-as-you-type, or reverse-geocode coordinates to the nearest address. | none | — | 🆓 Free, no key: public demo instance under fair use; heavy usage is throttled or banned | [docs](https://github.com/komoot/photon) |
| [Tomorrow.io API](https://www.tomorrow.io/weather-api/)
[](https://apps.apple.com/us/app/tomorrow-io-weather-forecast/id1443325509) | Get hyperlocal weather forecasts, historical data, and alerts for any coordinates via REST API or an official MCP server. | API key | [✅](https://api.tomorrow.io/v4/tomorrow-weather/mcp) | 🆓 free tier: 500 requests/day, 3 req/sec, 1 monitored location/alert | [docs](https://docs.tomorrow.io) |
## Finance, payments and market data
*Accept payments, move money, access bank data and query stock, FX and crypto prices.* — 16 services. JSON: [`catalog/finance-payments.json`](catalog/finance-payments.json)
| Service | What an agent can do | Auth | MCP | Free tier | Docs |
|---|---|---|:-:|---|---|
| [Adyen API](https://docs.adyen.com)
⭐⭐⭐⭐ **4.0**/5 · [1 review](https://sourceforge.net/software/product/Adyen/ "SourceForge")
[](https://www.npmjs.com/package/@adyen/api-library) [](https://pypi.org/project/Adyen/) [](https://stackoverflow.com/questions/tagged/adyen) [](https://github.com/Adyen/adyen-openapi) [](https://github.com/Adyen/adyen-mcp) [](https://github.com/Adyen/adyen-node-api-library/issues) | Process payments, payouts, and manage disputes/balances across global payment methods via REST API. | API key | [✅](https://github.com/Adyen/adyen-mcp) | paid only; requires a signed merchant contract, pay per-transaction | [docs](https://docs.adyen.com/api-explorer/) |
| [Alpaca Trading API](https://alpaca.markets)
⭐ **1.0**/5 · [3 reviews](https://sourceforge.net/software/product/Alpaca/ "SourceForge")
[](https://www.npmjs.com/package/@alpacahq/alpaca-trade-api) [](https://pypi.org/project/alpaca-py/) [](https://github.com/alpacahq/alpaca-mcp-server) [](https://github.com/alpacahq/alpaca-py/issues) | Place stock/options/crypto trades and stream market data via REST/WebSocket API, with free paper trading. | API key | [✅](https://github.com/alpacahq/alpaca-mcp-server) | 🆓 free paper trading (unlimited); free basic (IEX) market data feed | [docs](https://docs.alpaca.markets) |
| [Alpha Vantage](https://www.alphavantage.co)
[](https://stackoverflow.com/questions/tagged/alpha-vantage) | Fetch stock, forex, crypto prices and technical/fundamental indicators via a free REST API. | API key | [✅](https://mcp.alphavantage.co/mcp) | 🆓 free tier: 25 requests/day | [docs](https://www.alphavantage.co/documentation/) |
| [Coinbase (CDP / x402)](https://docs.cdp.coinbase.com)
⭐⭐⭐⭐ **4.4**/5 · [10 reviews](https://sourceforge.net/software/product/Coinbase/ "SourceForge")
[](https://apps.apple.com/us/app/coinbase-buy-crypto-stocks/id886427730) [](https://www.npmjs.com/package/@coinbase/cdp-sdk) [](https://pypi.org/project/cdp-sdk/) [](https://github.com/coinbase/payments-mcp) [](https://github.com/coinbase/cdp-sdk/issues) | Create wallets, send crypto, and pay per-API-call with stablecoins over HTTP (x402) via the Coinbase Developer Platform SDK. | API key | [✅](https://github.com/coinbase/payments-mcp) | 🆓 Free tier: CDP x402 Facilitator free for 1,000 onchain transactions/month, then $0.001/tx; payment verification always free | [docs](https://docs.cdp.coinbase.com) |
| [CoinGecko API](https://www.coingecko.com/en/api)
⭐⭐⭐⭐⭐ **5.0**/5 · [1 review](https://sourceforge.net/software/product/CoinGecko/ "SourceForge")
[](https://apps.apple.com/us/app/coingecko-crypto-tracker/id1390323960) [](https://www.npmjs.com/package/@coingecko/coingecko-typescript) [](https://pypi.org/project/coingecko-sdk/) [](https://github.com/coingecko/coingecko-typescript/issues) | Fetch live and historical crypto prices, market data, and NFT data via REST API or the official CoinGecko MCP server. | API key | [✅](https://mcp.api.coingecko.com/mcp) | 🆓 Free tier: Demo API plan 10,000 calls/month, 100 calls/min, attribution required; keyless free MCP with shared rate limits | [docs](https://docs.coingecko.com/reference/introduction) |
| [CoinMarketCap API](https://coinmarketcap.com/api/)
⭐⭐⭐ **2.7**/5 · [16 reviews](https://sourceforge.net/software/product/CoinMarketCap/ "SourceForge")
[](https://apps.apple.com/us/app/coinmarketcap-crypto-tracker/id1282107098) | Lets an agent fetch live and historical cryptocurrency prices, market caps, listings, exchange and DEX data, and indices like Fear & Greed. | API key | [✅](https://mcp.coinmarketcap.com/mcp) | 🆓 Free Basic plan: 15,000 credits/month, 50 requests/min, 1 API key, commercial use allowed; plus a keyless public API with lower rate limits | [docs](https://coinmarketcap.com/api/documentation/v1/) |
| [DexPaprika DEX API](https://dexpaprika.com/)
[](https://www.npmjs.com/package/dexpaprika-sdk) [](https://pypi.org/project/dexpaprika-sdk/) | Lets an agent query on-chain DEX data across 36 blockchains: liquidity pools, swaps, token prices, OHLCV history and live price streams. | none | [✅](https://mcp.dexpaprika.com/streamable-http) | 🆓 No key; 30,000 credits per rolling 30 days per IP at 15 requests/min. Free registered key: 100,000 credits/30 days at 30 requests/min, no card | [docs](https://docs.dexpaprika.com/api-reference/introduction) |
| [Financial Modeling Prep](https://site.financialmodelingprep.com)
⭐⭐⭐⭐ **3.6**/5 · [13 reviews](https://sourceforge.net/software/product/Financial-Modeling-Prep/ "SourceForge") | Fetch company financials, stock prices, and fundamental data via a REST API. | API key | [✅](https://financialmodelingprep.com/mcp) | 🆓 free tier: 250 requests/day (limited endpoints) | [docs](https://site.financialmodelingprep.com/developer/docs) |
| [Mercado Pago API](https://www.mercadopago.com/developers)
[](https://apps.apple.com/us/app/mercado-pago-cuenta-digital/id925436649) [](https://www.npmjs.com/package/mercadopago) [](https://pypi.org/project/mercadopago/) [](https://stackoverflow.com/questions/tagged/mercadopago) [](https://github.com/mercadopago/sdk-nodejs/issues) | Lets an agent create checkout preferences, payments, refunds and subscriptions and look up transactions in Latin America's Mercado Pago. | API key / OAuth | [✅](https://mcp.mercadopago.com/mcp) | 🆓 Free to integrate: no API or monthly fees, only per-transaction commissions; free test credentials and test users for sandbox payments | [docs](https://www.mercadopago.com/developers/en/reference) |
| [Open Exchange Rates](https://openexchangerates.org) | Fetch current and historical foreign-exchange rates for 200+ currencies via a REST API. | API key | — | 🆓 free tier: 1,000 requests/month, USD base only, hourly updates | [docs](https://docs.openexchangerates.org) |
| [PayPal API](https://developer.paypal.com)
[](https://apps.apple.com/us/app/paypal-pay-send-save/id283646709) [](https://www.npmjs.com/package/@paypal/paypal-server-sdk) [](https://pypi.org/project/paypal-server-sdk/) [](https://stackoverflow.com/questions/tagged/paypal) | Process payments, payouts, invoices, and subscriptions via REST API or PayPal's official MCP server. | API key / OAuth | [✅](https://mcp.paypal.com/mcp) | 🆓 free to integrate; pay per-transaction fees only; sandbox for testing | [docs](https://developer.paypal.com/api/rest/) |
| [Plaid API](https://plaid.com/docs/)
[](https://www.npmjs.com/package/plaid) [](https://pypi.org/project/plaid-python/) [](https://stackoverflow.com/questions/tagged/plaid) [](https://github.com/plaid/plaid-openapi) [](https://github.com/plaid/plaid-node/issues) | Link bank accounts and fetch balances, transactions, and identity data via REST API/SDKs. | API key | [✅](https://api.dashboard.plaid.com/mcp/) | Trial: Sandbox always free; new US/Canada teams (since 2026-04-15) get a free Trial plan with up to 10 Production Items one-time; then pay-as-you-go | [docs](https://plaid.com/docs/api/) |
| [Polygon.io / Massive](https://massive.com)
[](https://www.npmjs.com/package/@massive.com/client-js) [](https://pypi.org/project/massive/) [](https://github.com/massive-com/mcp_massive) [](https://github.com/massive-com/client-python/issues) | Query real-time and historical stocks, options, forex, and crypto market data via REST/WebSocket API. | API key | [✅](https://github.com/massive-com/mcp_massive) | 🆓 free tier available (delayed data, limited calls/min); paid plans for real-time | [docs](https://massive.com/docs) |
| [Square API](https://squareup.com/us/en/developers)
[](https://apps.apple.com/us/app/square-point-of-sale-pos/id335393788) [](https://www.npmjs.com/package/square) [](https://pypi.org/project/squareup/) [](https://stackoverflow.com/questions/tagged/square-connect) [](https://github.com/square/connect-api-specification) [](https://github.com/square/square-nodejs-sdk/issues) | Process in-person/online payments, manage orders, invoices, and catalog via REST API and SDKs. | API key / OAuth | [✅](https://mcp.squareup.com/mcp) | 🆓 free to integrate; pay per-transaction processing fees; free Sandbox for testing | [docs](https://developer.squareup.com/reference/square) |
| [Stripe API](https://docs.stripe.com/api)
[](https://apps.apple.com/us/app/stripe-dashboard/id978516833) [](https://www.npmjs.com/package/stripe) [](https://pypi.org/project/stripe/) [](https://stackoverflow.com/questions/tagged/stripe-payments) [](https://github.com/stripe/stripe-node/issues) | Create payments, subscriptions, invoices, and refunds programmatically via REST API or the official Stripe MCP server. | API key / OAuth | [✅](https://mcp.stripe.com) | 🆓 free to integrate; pay per-transaction fees only, no monthly fee | [docs](https://docs.stripe.com/api) |
| [Wise API](https://docs.wise.com)
[](https://apps.apple.com/us/app/wise-global-money-transfer/id612261027) [](https://github.com/2060-io/mcp-wise) | Send international transfers, check exchange rates, and manage multi-currency balances via REST API. | API key / OAuth | [◐](https://github.com/2060-io/mcp-wise) | 🆓 free API access; normal Wise transfer fees apply per transaction; sandbox available | [docs](https://docs.wise.com/api-docs) |
## E-commerce
*Manage stores, products, orders and marketplace listings.* — 8 services. JSON: [`catalog/ecommerce.json`](catalog/ecommerce.json)
| Service | What an agent can do | Auth | MCP | Free tier | Docs |
|---|---|---|:-:|---|---|
| [Amazon Selling Partner API](https://developer-docs.amazon/sp-api/)
[](https://stackoverflow.com/questions/tagged/amazon-selling-partner-api) [](https://github.com/amzn/selling-partner-api-models) [](https://github.com/amzn/selling-partner-api-models/issues) | Manage listings, orders, inventory, and reports for an Amazon seller/vendor account via REST API. | OAuth 2.0 | [✅](https://sellingpartner-ai.amazon.com/mcp) | 🆓 free API access; requires an existing Amazon Seller/Vendor Central account | [docs](https://developer-docs.amazon/sp-api/) |
| [BigCommerce API](https://docs.bigcommerce.com)
[](https://apps.apple.com/us/app/bigcommerce/id1418570678) [](https://pypi.org/project/bigcommerce/) [](https://stackoverflow.com/questions/tagged/bigcommerce) [](https://github.com/bigcommerce/bigcommerce-api-python/issues) | Manage catalog, orders, customers, and carts on a BigCommerce store via REST/GraphQL APIs. | API key / OAuth | [✅](https://docs.bigcommerce.com/developer/api-reference/mcp/overview) | Trial: free 15-day trial store to test the API (partners can create sandbox stores); ongoing use needs a paid BigCommerce plan | [docs](https://docs.bigcommerce.com/developer/api-reference/rest/overview) |
| [eBay APIs](https://developer.ebay.com)
[](https://apps.apple.com/us/app/ebay-online-shopping-selling/id282614216) [](https://stackoverflow.com/questions/tagged/ebay-api) [](https://github.com/eBay/npm-public-api-mcp) | List items, manage orders/inventory, and search listings across eBay marketplaces via REST APIs. | OAuth 2.0 | [✅](https://github.com/eBay/npm-public-api-mcp) | 🆓 free developer tier with call-volume limits; sandbox environment included | [docs](https://developer.ebay.com/docs) |
| [Etsy Open API v3](https://developer.etsy.com)
[](https://apps.apple.com/us/app/etsy-shop-from-real-people/id477128284) [](https://stackoverflow.com/questions/tagged/etsy) | List products, manage orders/shop, and search listings on the Etsy marketplace via REST API. | OAuth 2.0 | [✅](https://mcp.api.etsycloud.com/mcp) | 🆓 Free: developer keystring at no cost; per-app QPS/QPD rate limits shown in the Developer Portal | [docs](https://developer.etsy.com/documentation/) |
| [Mercado Libre API](https://developers.mercadolibre.com.ar/) | Lets an agent search items and categories and manage a seller's listings, orders, questions, shipments and promotions on the Mercado Libre marketplace. | OAuth 2.0 | — | 🆓 Free: create an app in DevCenter with a Mercado Libre account (no API fee); rate limited (HTTP 429); marketplace selling fees still apply | [docs](https://developers.mercadolibre.com.ar/en_us/api-docs) |
| [Printful API](https://developers.printful.com) | Create print-on-demand products, sync catalogs, and submit fulfillment orders via REST API. | API key / OAuth | — | 🆓 Free: no monthly fee for API/store connection (pay only for fulfillment); 120 API calls/min general rate limit | [docs](https://developers.printful.com/docs/) |
| [Shopify Admin / Storefront API](https://shopify.dev)
[](https://apps.apple.com/us/app/shopify-sell-run-a-business/id371294472) [](https://www.npmjs.com/package/@shopify/shopify-api) [](https://pypi.org/project/ShopifyAPI/) [](https://stackoverflow.com/questions/tagged/shopify) [](https://github.com/Shopify/shopify-app-js/issues) | Manage products, orders, customers, and inventory (Admin API) or build storefronts (Storefront API) via REST/GraphQL. | API key / OAuth | [✅](https://shopify.dev/docs/apps/build/storefront-mcp/servers/storefront) | 🆓 Free: unlimited free dev stores via a free Partner account/Dev Dashboard for building and testing (no real transactions); live merchant stores need a paid Shopify plan | [docs](https://shopify.dev/docs/api/admin-graphql) |
| [WooCommerce REST API](https://woocommerce.github.io/woocommerce-rest-api-docs/)
[](https://apps.apple.com/us/app/woocommerce-store-pos/id1389130815) [](https://www.npmjs.com/package/@woocommerce/woocommerce-rest-api) [](https://pypi.org/project/WooCommerce/) [](https://stackoverflow.com/questions/tagged/woocommerce) [](https://github.com/woocommerce/wc-api-python/issues) | Manage products, orders, and customers on a self-hosted WooCommerce store via REST API. | API key | [✅](https://developer.woocommerce.com/docs/features/mcp/) | 🆓 Free: open-source WordPress plugin, free to download and use; no platform fees, only your own hosting costs | [docs](https://woocommerce.github.io/woocommerce-rest-api-docs/) |
## Automation and integration platforms
*One connection that exposes thousands of third-party app actions to an agent, with managed auth.* — 15 services. JSON: [`catalog/automation-integration.json`](catalog/automation-integration.json)
| Service | What an agent can do | Auth | MCP | Free tier | Docs |
|---|---|---|:-:|---|---|
| [Activepieces](https://www.activepieces.com) | Build, run and manage no-code flows across 400+ apps via REST API or the built-in MCP server. | API key | [✅](https://www.activepieces.com/docs/mcp/overview) | 🆓 free: open-source, self-hostable at no cost; cloud free plan gives 100 credits/day, no card required | [docs](https://www.activepieces.com/docs/endpoints/overview) |
| [Arcade.dev](https://www.arcade.dev)
[](https://www.npmjs.com/package/@arcadeai/arcadejs) [](https://pypi.org/project/arcadepy/) | Execute authorized tool calls (GitHub, Slack, Google, etc.) with managed OAuth via API, SDK, or 200+ MCP servers. | API key / OAuth | [✅](https://docs.arcade.dev/en/guides/mcp-gateways) | 🆓 free tier: 2,000 auth events + 2,000 tool calls/mo, no credit card required | [docs](https://docs.arcade.dev/en/home/quickstart) |
| [Composio](https://composio.dev)
[](https://www.npmjs.com/package/@composio/core) [](https://pypi.org/project/composio/) [](https://github.com/ComposioHQ/composio/issues) | Discover, authorize and execute actions across 1,500+ SaaS toolkits through a unified API, SDK, or MCP session. | API key / OAuth | [✅](https://connect.composio.dev/mcp) | 🆓 free tier: 100,000 tool calls + 50,000 trigger events/mo, no credit card required | [docs](https://docs.composio.dev/docs/quickstart) |
| [Gumloop](https://www.gumloop.com)
[](https://pypi.org/project/gumloop/) | Create AI agents, start chat sessions, and trigger no-code automations via REST API, SDKs, or the Gumloop MCP server. | API key / OAuth | [✅](https://mcp.gumloop.com/gumloop/mcp) | 14-day free trial of Pro (20,000 credits), requires credit card, no permanent free tier | [docs](https://docs.gumloop.com/api-reference/getting-started) |
| [IFTTT API](https://ifttt.com/developers)
[](https://apps.apple.com/us/app/ifttt-automate-work-and-home/id660944635) [](https://stackoverflow.com/questions/tagged/ifttt) | Fire a webhook event to trigger pre-configured Applets that act in connected consumer apps (Pro plan required). | API key | [✅](https://ifttt.com/mcp) | no free-plan access; Webhooks/API require Pro plan ($2.99+/mo) | [docs](https://platform.ifttt.com/docs/api_reference) |
| [Keboola Storage API](https://www.keboola.com) | Lets an agent load and query tables, create SQL and Python transformations, and trigger data pipeline jobs in a Keboola project. | API key / OAuth | [✅](https://mcp.keboola.com/mcp) | 🆓 Free plan: 1 project, 120 compute minutes in the first month then 60 minutes/month, extra-small Snowflake backend; no credit card | [docs](https://help.keboola.com/storage/api/) |
| [Make API / MCP](https://www.make.com) | Trigger and manage Make automation scenarios, or call MCP tools, via REST API and a native MCP server/client. | API key | [✅](https://mcp.make.com) | 🆓 Free tier: 1,000 credits/month, 2 active scenarios; Make API access requires Core plan or higher | [docs](https://developers.make.com/api-documentation) |
| [Merge (Agent Handler)](https://www.merge.dev) | Give an agent governed, audited tool access to Salesforce, Slack, Jira and 100+ enterprise apps via API or MCP. | API key | [✅](https://docs.merge.dev/merge-agent-handler/build/connecting-agents/mcp-integration) | 🆓 Free tier: 2,000 credits/month for prototyping/testing; production usage needs a paid Pro ($1,000/mo, 25,000 credits) or Enterprise plan | [docs](https://docs.merge.dev/merge-agent-handler/overview) |
| [n8n API](https://n8n.io)
[](https://stackoverflow.com/questions/tagged/n8n) | Create, run and monitor n8n workflows via REST API, and expose or consume tools through MCP trigger/client nodes. | API key | [✅](https://docs.n8n.io/connect/connect-to-n8n-mcp-server) | 🆓 Free: self-hosted Community Edition (open source, unlimited); n8n Cloud trial has no API access | [docs](https://docs.n8n.io/connect/n8n-api) |
| [Nango](https://www.nango.dev)
[](https://www.npmjs.com/package/@nangohq/node) [](https://github.com/NangoHQ/nango/issues) | Authorize end users to 400+ third-party APIs/MCP servers and proxy authenticated calls to them from your app or agent. | API key / OAuth | [✅](https://nango.dev/docs/implementation-guides/use-cases/tool-calling/implement-mcp-server) | 🆓 free tier: 10 connections, 10 compute hours, 10GB data transfer/mo | [docs](https://nango.dev/docs) |
| [Paragon ActionKit](https://www.useparagon.com)
[](https://www.npmjs.com/package/@useparagon/connect) [](https://github.com/useparagon/paragon-mcp) | Call thousands of pre-built Tools and Triggers across 130+ SaaS apps (Slack, Salesforce, Gmail) via API or MCP. | API key / OAuth | [✅](https://github.com/useparagon/paragon-mcp) | Trial: free trial ('Start free trial'); no lasting free tier; pricing by custom quote based on Connected Users | [docs](https://docs.useparagon.com/actionkit/overview) |
| [Pipedream Connect](https://pipedream.com/connect)
[](https://www.npmjs.com/package/@pipedream/sdk) [](https://github.com/PipedreamHQ/pipedream-sdk-typescript/issues) | Call 2,700+ app APIs and run managed-auth actions on end users' behalf via REST API or Pipedream MCP servers. | API key / OAuth | [✅](https://remote.mcp.pipedream.net/v3) | 🆓 Free tier: free workspaces get a daily credit limit and limited connected accounts; Connect is free in development mode, production use needs a paid plan | [docs](https://pipedream.com/docs/connect/mcp/developers) |
| [StackOne](https://www.stackone.com)
[](https://www.npmjs.com/package/@stackone/ai) [](https://github.com/StackOneHQ/stackone-ai-node/issues) | Call 520+ SaaS connectors (HRIS, ATS, CRM, documents) through one unified API or MCP gateway covering 32,000+ actions. | API key | [✅](https://mcp.stackone.com/mcp) | 🆓 free tier: 1,000 action-call credits/seat/mo (Starter), no credit card required | [docs](https://docs.stackone.com/docs/getting-started) |
| [Superglue](https://superglue.ai)
[](https://www.npmjs.com/package/@superglue/client) [](https://github.com/superglue-ai/superglue/issues) | Connect and orchestrate enterprise systems (ERP, CRM, databases) through a self-serve API and per-integration MCP servers. | API key | [✅](https://superglue.ai/docs/mcp/using-the-mcp/) | 🆓 free tier: Pro plan free to start, 3,000 executions/mo and 5M tokens/mo included, self-serve signup | [docs](https://superglue.ai/docs) |
| [Zapier MCP / AI Actions](https://zapier.com/mcp)
[](https://stackoverflow.com/questions/tagged/zapier) | Call 9,000+ apps and 40,000+ pre-built actions (Slack, Gmail, Sheets, etc.) through one MCP endpoint. | API key / OAuth | [✅](https://mcp.zapier.com/api/v1/connect) | 🆓 Free tier: 100 tasks/month; each successful MCP tool call uses 2 tasks (~50 calls/month); more on paid plans | [docs](https://docs.zapier.com/mcp/home) |
## Model APIs and inference
*LLM, embedding and multimodal model endpoints an agent can delegate sub-tasks to.* — 18 services. JSON: [`catalog/model-inference.json`](catalog/model-inference.json)
| Service | What an agent can do | Auth | MCP | Free tier | Docs |
|---|---|---|:-:|---|---|
| [Anthropic Claude API](https://docs.anthropic.com)
[](https://apps.apple.com/us/app/claude-by-anthropic/id6473753684) [](https://www.npmjs.com/package/@anthropic-ai/sdk) [](https://pypi.org/project/anthropic/) [](https://github.com/anthropics/anthropic-sdk-python/issues) | Send messages to Claude models for text and vision generation, tool use, batch jobs and document analysis. | API key | — | paid only | [docs](https://platform.claude.com/docs/en/api/messages) |
| [Cohere API](https://docs.cohere.com)
[](https://www.npmjs.com/package/cohere-ai) [](https://pypi.org/project/cohere/) [](https://github.com/cohere-ai/cohere-python/issues) | Call chat, embed, rerank and classify endpoints for text generation, semantic search and RAG. | API key | — | 🆓 free trial key: 1,000 calls/mo, rate-limited | [docs](https://docs.cohere.com/reference/about) |
| [Comet Opik Cloud API](https://www.comet.com/site/products/opik/)
[](https://www.npmjs.com/package/opik) [](https://pypi.org/project/opik/) [](https://github.com/comet-ml/opik/issues) | Lets an agent log and read LLM traces and spans, score them with evaluations and manage datasets and prompts in Opik. | API key / OAuth | [✅](https://www.comet.com/opik/api/v1/mcp) | 🆓 Free cloud plan: 25k spans/month, 60-day data retention, up to 10 team members | [docs](https://www.comet.com/docs/opik/reference/rest-api/overview) |
| [DeepSeek API](https://api-docs.deepseek.com) | Send chat and reasoning requests to DeepSeek models via an OpenAI- and Anthropic-compatible REST API. | API key | — | paid only | [docs](https://api-docs.deepseek.com/api/deepseek-api) |
| [fal.ai](https://fal.ai)
[](https://www.npmjs.com/package/@fal-ai/client) [](https://pypi.org/project/fal-client/) [](https://github.com/fal-ai/fal/issues) | Generate images, video, audio and 3D with 1,000+ hosted models via queued REST or real-time WebSocket. | API key / OAuth | [✅](https://mcp.fal.ai/mcp) | Paid only; prepaid credits, priced per model (e.g. FLUX.1 schnell $0.003/megapixel) | [docs](https://fal.ai/docs/model-apis) |
| [Fireworks AI](https://fireworks.ai)
[](https://pypi.org/project/fireworks-ai/) | Run serverless or dedicated inference and fine-tuning for open models via OpenAI-compatible APIs. | API key | — | trial credits: $1 on signup | [docs](https://docs.fireworks.ai) |
| [Google Gemini API](https://ai.google.dev)
[](https://apps.apple.com/us/app/google-gemini/id6477489729) [](https://www.npmjs.com/package/@google/genai) [](https://pypi.org/project/google-genai/) [](https://github.com/googleapis/python-genai/issues) | Generate text and images, analyze multimodal input (video, audio, PDFs), and run code execution with Gemini models. | API key | — | 🆓 free tier: rate-limited access to Flash/Pro models | [docs](https://ai.google.dev/api) |
| [Groq API](https://console.groq.com)
[](https://www.npmjs.com/package/groq-sdk) [](https://pypi.org/project/groq/) | Run fast LLM chat, tool use and speech-to-text on hosted open models via an OpenAI-compatible API. | API key | — | 🆓 free tier: rate-limited per model, no card | [docs](https://console.groq.com/docs/api-reference) |
| [Hugging Face Inference Providers](https://huggingface.co/docs/inference-providers)
[](https://www.npmjs.com/package/@huggingface/inference) [](https://pypi.org/project/huggingface_hub/) [](https://github.com/huggingface/huggingface_hub/issues) | Call hundreds of open-weight chat, vision, image, video and audio models across many providers with one HF token. | API key | [✅](https://huggingface.co/mcp) | 🆓 Free tier: $0.10/month in Inference Providers credits (PRO $2.00/month) | [docs](https://huggingface.co/docs/inference-providers/index) |
| [Mistral AI API](https://docs.mistral.ai)
[](https://apps.apple.com/us/app/vibe-by-mistral-ex-le-chat/id6740410176) [](https://www.npmjs.com/package/@mistralai/mistralai) [](https://pypi.org/project/mistralai/) [](https://github.com/mistralai/client-python/issues) | Run chat completions, embeddings, OCR and document processing with Mistral models via REST. | API key | [✅](https://api.mistral.ai/mcp) | 🆓 free tier: Studio free mode, rate-limited | [docs](https://docs.mistral.ai/api) |
| [OpenAI API](https://platform.openai.com)
⭐⭐⭐⭐⭐ **5.0**/5 · [3 reviews](https://sourceforge.net/software/product/OpenAI/ "SourceForge")
[](https://apps.apple.com/us/app/chatgpt/id6448311069) [](https://www.npmjs.com/package/openai) [](https://pypi.org/project/openai/) [](https://stackoverflow.com/questions/tagged/openai-api) [](https://github.com/openai/openai-python/issues) | Generate text, images, audio and embeddings, and run tool-calling via the Responses and Chat Completions APIs. | API key | [✅](https://developers.openai.com/mcp) | paid only | [docs](https://developers.openai.com/api/reference/overview) |
| [OpenRouter](https://openrouter.ai)
[](https://www.npmjs.com/package/@openrouter/sdk) [](https://pypi.org/project/openrouter/) [](https://github.com/OpenRouterTeam/typescript-sdk/issues) | Route chat requests to hundreds of LLMs from many providers through one OpenAI-compatible endpoint with fallback. | API key / OAuth | [✅](https://mcp.openrouter.ai/mcp) | 🆓 free models: 50 req/day (1,000/day after $10 purchase) | [docs](https://openrouter.ai/docs/api-reference/overview) |
| [PiAPI](https://piapi.ai)
[](https://github.com/apinetwork/piapi-mcp-server) | Generate images, video and music through one API proxying Midjourney, Flux, Kling and other models. | API key | [◐](https://github.com/apinetwork/piapi-mcp-server) | trial credits: $0.50 on signup | [docs](https://piapi.ai/docs/overview) |
| [Replicate](https://replicate.com)
[](https://www.npmjs.com/package/replicate) [](https://pypi.org/project/replicate/) [](https://github.com/replicate/replicate-python/issues) | Run thousands of hosted image, video, audio and text models via HTTP predictions; also fine-tune and deploy. | API key | [✅](https://mcp.replicate.com/sse) | paid only | [docs](https://replicate.com/docs/reference/http) |
| [Together AI](https://www.together.ai)
[](https://www.npmjs.com/package/together-ai) [](https://pypi.org/project/together/) | Run serverless inference, batch jobs, fine-tuning and dedicated GPU endpoints for open-source models. | API key | — | Paid only: no free trial; minimum $5 prepaid credit purchase | [docs](https://docs.together.ai) |
| [Vercel AI Gateway](https://vercel.com/ai-gateway)
[](https://www.npmjs.com/package/ai) [](https://www.npmjs.com/package/@ai-sdk/gateway) [](https://github.com/vercel/ai/issues) | Send chat, image, embedding and rerank requests to 100+ models through one gateway with failover and spend tracking. | API key / OAuth | — | 🆓 free tier: monthly credits on subset of models | [docs](https://vercel.com/docs/ai-gateway/sdks-and-apis) |
| [Voyage AI (embeddings/rerank)](https://www.voyageai.com)
[](https://www.npmjs.com/package/voyageai) [](https://pypi.org/project/voyageai/) [](https://github.com/voyage-ai/typescript-sdk/issues) | Generate text, code and multimodal embeddings and rerank documents for RAG and semantic search. | API key | — | 🆓 free tier: 200M tokens on current models | [docs](https://docs.voyageai.com/reference/embeddings-api) |
| [xAI Grok API](https://docs.x.ai)
[](https://apps.apple.com/us/app/grok-ai/id6670324846) [](https://pypi.org/project/xai-sdk/) [](https://github.com/xai-org/xai-sdk-python/issues) | Generate text, images, video and voice with Grok models, with built-in web search and code tools. | API key | — | paid only (prepaid credits) | [docs](https://docs.x.ai/developers/rest-api-reference/inference) |
## Related directories and registries
Other machine-readable sources agents can use to discover tools:
- [Official MCP Registry](https://registry.modelcontextprotocol.io) — The official Model Context Protocol registry; agents can call its REST API (with OpenAPI spec) to search and list available MCP servers. — machine-readable:
- [public-apis/public-apis](https://github.com/public-apis/public-apis) — A community-curated GitHub list of 1,400+ free public APIs by category, fetchable as raw Markdown for programmatic parsing. — machine-readable:
- [APIs.guru OpenAPI Directory](https://apis.guru) — An open, unauthenticated directory of 2,500+ public OpenAPI specs; agents fetch list.json to discover APIs and their OpenAPI definitions. — machine-readable:
- [punkpeye/awesome-mcp-servers](https://github.com/punkpeye/awesome-mcp-servers) — A widely-starred curated GitHub list of MCP servers by category, fetchable as raw Markdown for automated discovery. — machine-readable:
- [Smithery](https://smithery.ai) — An MCP server registry and hosting gateway (6,000+ servers) whose REST API lets agents search servers and obtain connection URLs. — machine-readable:
- [Glama MCP Directory](https://glama.ai/mcp/servers) — A large scanned and scored registry of 90,000+ open-source MCP servers, queryable via a bearer-authenticated REST API. — machine-readable:
- [mcp.so](https://mcp.so) — A community MCP server marketplace and browsable directory site, but it has no publicly documented JSON/REST API for programmatic access.
- [PulseMCP](https://www.pulsemcp.com) — A directory of 21,800+ MCP servers updated daily; its Sub-Registry REST API (API key required) lets agents list and search servers. — machine-readable:
- [llms.txt convention / directory](https://llmstxt.org) — An open convention for a root-level llms.txt file giving agents a concise Markdown map of a site's key content; a community directory indexes published files, though it exposes no JSON API. — machine-readable:
- [Postman API Network](https://www.postman.com/explore) — The largest network of public API collections shared on Postman, browsable on the web but with no documented public API for programmatic discovery.
- [RapidAPI Hub (Nokia API Hub)](https://rapidapi.com) — A large third-party API marketplace with growing MCP support for agents, but with no public, unauthenticated catalog endpoint for bulk discovery.
## Contributing
Edit only the files in `data/` (usually `data/catalog.json`), run `python scripts/build.py` to regenerate the English, Polish and LLM files, and open a pull request. Every new entry must link to the vendor's official API documentation. Step-by-step guide: `CONTRIBUTING.md`.
## See also
- [Model Context Protocol](https://modelcontextprotocol.io)
- [Official MCP Registry](https://registry.modelcontextprotocol.io)
- [llms.txt proposal](https://llmstxt.org)
## References
The initial candidate list was compiled from:
1. [GetStream — AI Agent Tools Catalog](https://github.com/GetStream/ai-agent-tools-catalog)
2. [StackOne — AI Agent Tools Landscape 2026](https://www.stackone.com/blog/ai-agent-tools-landscape-2026/)
3. [Mastra — Best AI agent search tools](https://mastra.ai/articles/best-ai-agent-search-tools)
4. [abitwise — AI-tools](https://github.com/abitwise/AI-tools)
5. [Sylus — Top-rated connectors for AI tool integrations](https://www.sylus.ai/feeds/blog/top-rated-connectors-ai-tool-integrations)
Generated from data/catalog.json on 2026-10-19.