# Symbl.ai

> Symbl.ai is a conversation-intelligence platform for understanding and generating insights from human conversations across voice, video, and text. Its developer platform exposed Async, Streaming, Telephony, Conversation and Management APIs plus the Nebula LLM for real-time speech-to-text and conversational insights (action items, topics, questions, follow-ups, sentiment, custom trackers), with first-party SDKs for JavaScript, Web, Python, and Go. Symbl.ai was acquired by Invoca (announced 2025-05-28) and the standalone developer platform has since been DECOMMISSIONED: api.symbl.ai, docs.symbl.ai, platform.symbl.ai, nebula.symbl.ai and integrations.symbl.ai no longer resolve in DNS. The marketing site, pricing page, compliance page, blog, public Postman workspaces and the client SDKs on npm, PyPI and pkg.go.dev remain live.

This llms.txt was generated by the API Evangelist enrichment pipeline from public sources (method: generated), because Symbl.ai does not publish its own /llms.txt (https://symbl.ai/llms.txt returns 404). Last verified 2026-08-14.

## Status — read this first
- There is NO callable Symbl.ai API today. Every documented endpoint is on api.symbl.ai, which is NXDOMAIN as of 2026-08-14.
- There is NO way to obtain credentials: the sign-up link on the live pricing page points at https://platform.symbl.ai/#/signup, which does not resolve.
- No OpenAPI, AsyncAPI, MCP server or A2A agent card has ever been published by Symbl.ai.
- Detail and evidence: lifecycle/symblai-lifecycle.yml in this repository.

## Overview
- Website: https://symbl.ai/
- Developer hub: https://symbl.ai/developers/
- Platform overview: https://symbl.ai/platform/
- Blog: https://symbl.ai/developers/blog/
- Pricing: https://symbl.ai/company/pricing/
- Security, privacy and compliance: https://symbl.ai/platform/security/overview/
- Support plans: https://symbl.ai/service-and-support/support/support-plans/
- FAQs: https://symbl.ai/service-and-support/support/faqs/
- Acquisition announcement: https://symbl.ai/developers/blog/symbl-ai-is-joining-invoca/

## Documentation (open-sourced, archival)
Symbl.ai open-sourced its Docusaurus documentation. The hosted site is gone; the source is still public and is now the only surviving API reference. Last push 2022-07-19, and its internal links point at the dead docs.symbl.ai host.
- Docs repository: https://github.com/symblai/symbl-docs
- Authentication: https://github.com/symblai/symbl-docs/blob/master/docs/developer-tools/authentication.md
- Error codes: https://github.com/symblai/symbl-docs/blob/master/docs/developer-tools/errors.md
- Changelog (frozen 2022-06-22): https://github.com/symblai/symbl-docs/blob/master/docs/changelog.md
- FAQ, including concurrency limits: https://github.com/symblai/symbl-docs/blob/master/docs/faq.md
- Code samples: https://github.com/symblai/getting-started-samples

## Historical API surface (not reachable)
- Base: https://api.symbl.ai
- Auth: POST https://api.symbl.ai/oauth2/token:generate with {type, appId, appSecret} returning {accessToken, expiresIn: 86400}. Called "OAuth 2.0" in the docs, but it is a bespoke JSON credential exchange, not an RFC 6749 grant.
- Async API — upload audio/video/text or a URL for asynchronous processing; optional webhookUrl job callback.
- Streaming API — wss://api.symbl.ai/v1/realtime/insights/{connectionId}
- Subscribe API (Beta) — wss://api.symbl.ai/v1/subscribe/{connectionId}, listen-only, up to 10,000 participants.
- Telephony API — PSTN / SIP dial-in.
- Conversation API — topics, action items, questions, follow-ups, entities, sentiment, transcript, analytics, members, speakers.
- Management API — Trackers and Conversation Groups CRUD.
- Experience API / pre-built UI — hosted summary and trackers-and-analytics experiences.
- Nebula LLM and embeddings.
- Errors: plain JSON with a `message` field; 400/401/403/404/405/409/413/429/500/502/504. No RFC 9457 problem+json.
- Limits: concurrency-based, no rate-limit response headers were ever documented. See rate-limits/symblai-rate-limits.yml.

## SDKs (official, github.com/symblai)
- JavaScript SDK 1.4.10 (2024-09-03) — https://www.npmjs.com/package/@symblai/symbl-js (repo: https://github.com/symblai/symbl-js-sdk)
- Web SDK 1.0.14 (2024-09-03) — https://www.npmjs.com/package/@symblai/symbl-web-sdk (repo: https://github.com/symblai/symbl-web-sdk)
- Python SDK 2.0.6 (2024-09-04) — https://pypi.org/project/symbl/ (repo: https://github.com/symblai/symbl-python-sdk)
- Go SDK v0.3.7 (2024-11-18) — https://pkg.go.dev/github.com/symblai/symbl-go-sdk (repo: https://github.com/symblai/symbl-go-sdk)
All install, none can connect: every one targets api.symbl.ai.

## UI components
- @symblai/symbl-ui-components 0.6.0 (2024-10-10) — https://www.npmjs.com/package/@symblai/symbl-ui-components (repo: https://github.com/symblai/symbl-ui-components)

## Postman (first-party, live)
- Workspace: https://www.postman.com/symbldotai/workspace/symbl-ai/overview
- Integrations for AI: https://www.postman.com/symbldotai/workspace/symbl-ai-integrations-for-ai/overview
- Use-Cases for AI: https://www.postman.com/symbldotai/workspace/symbl-ai-use-cases-for-ai/overview
Published under the handle `symbldotai` (publisher name "Symbl.ai"). The collections describe the same api.symbl.ai endpoints and are therefore also not callable.

## Compliance (published on the live site)
SOC 2 Type II, HIPAA BAA, PCI DSS, GDPR, CSA CAIQ — https://symbl.ai/platform/security/overview/

## Source
- GitHub organization: https://github.com/symblai
- Terms of Service: https://symbl.ai/termsofservice/
- Privacy Policy: https://symbl.ai/privacy-policy/