aid: builtwith
name: BuiltWith
description: Technology profiling and lead generation platform with a REST API for detecting technologies used by websites, tracking technology trends, and identifying technology adoption across 491.9 million domains and 115,907 tracked web technologies.
type: Index
image: https://kinlane-productions.s3.amazonaws.com/apis-json/apis-json-logo.jpg
url: https://raw.githubusercontent.com/api-evangelist/builtwith/refs/heads/main/apis.yml
created: 2026-06-13
modified: 2026-06-13
specificationVersion: '0.19'
tags:
  - Technology Profiling
  - Lead Generation
  - Web Intelligence
  - Technology Detection
  - Website Analysis
  - Market Research
apis:
  - name: BuiltWith Domain API
    description: Current and historical website technology information for single or multiple domains with support for JSON, XML, and CSV formats.
    humanURL: https://api.builtwith.com/domain-api
    baseURL: https://api.builtwith.com/v22
    tags:
      - Domain Lookup
      - Technology Detection
      - Historical Data
    properties:
      - type: Documentation
        url: https://api.builtwith.com/domain-api
    contact:
      - FN: BuiltWith Support
        url: https://builtwith.com/contact
  - name: BuiltWith Lists API
    description: Retrieve lists of websites using specific web technologies in XML, JSON, TXT, CSV, and TSV formats.
    humanURL: https://api.builtwith.com/lists-api
    baseURL: https://api.builtwith.com/lists12
    tags:
      - Technology Lists
      - Lead Generation
      - Website Lists
    properties:
      - type: Documentation
        url: https://api.builtwith.com/lists-api
    contact:
      - FN: BuiltWith Support
        url: https://builtwith.com/contact
  - name: BuiltWith Trends API
    description: Access technology trend data showing adoption and growth of web technologies over time.
    humanURL: https://api.builtwith.com/trends-api
    baseURL: https://api.builtwith.com/trends/v6
    tags:
      - Technology Trends
      - Market Intelligence
      - Adoption Data
    properties:
      - type: Documentation
        url: https://api.builtwith.com/trends-api
    contact:
      - FN: BuiltWith Support
        url: https://builtwith.com/contact
  - name: BuiltWith Change API
    description: Track technology additions and removals on websites with business context in JSON format.
    humanURL: https://api.builtwith.com/change-api
    baseURL: https://api.builtwith.com/change1
    tags:
      - Technology Changes
      - Business Intelligence
      - Signals
    properties:
      - type: Documentation
        url: https://api.builtwith.com/change-api
    contact:
      - FN: BuiltWith Support
        url: https://builtwith.com/contact
  - name: BuiltWith Relationships API
    description: Website interconnection data revealing domain relationships via shared IPs, analytics, and other attributes.
    humanURL: https://api.builtwith.com/relationships-api
    baseURL: https://api.builtwith.com/rv4
    tags:
      - Domain Relationships
      - Web Graph
      - Interconnections
    properties:
      - type: Documentation
        url: https://api.builtwith.com/relationships-api
    contact:
      - FN: BuiltWith Support
        url: https://builtwith.com/contact
  - name: BuiltWith Free API
    description: Free tier API providing technology group counts and last-updated timestamps for website domains.
    humanURL: https://api.builtwith.com/free-api
    baseURL: https://api.builtwith.com/free1
    tags:
      - Free Tier
      - Technology Counts
      - Domain Lookup
    properties:
      - type: Documentation
        url: https://api.builtwith.com/free-api
    contact:
      - FN: BuiltWith Support
        url: https://builtwith.com/contact
  - name: BuiltWith Ask API
    description: Natural language website lookups returning technology profile data in JSON and CSV formats.
    humanURL: https://api.builtwith.com/ask-api
    baseURL: https://api.builtwith.com/ask1
    tags:
      - Natural Language
      - AI
      - Domain Lookup
    properties:
      - type: Documentation
        url: https://api.builtwith.com/ask-api
    contact:
      - FN: BuiltWith Support
        url: https://builtwith.com/contact
  - name: BuiltWith Live Feed API
    description: Real-time WebSocket feed of technology detections as they happen across the web.
    humanURL: https://api.builtwith.com/live-feed-api
    baseURL: wss://sync.builtwith.com/wss/
    tags:
      - Real-time
      - WebSocket
      - Streaming
    properties:
      - type: Documentation
        url: https://api.builtwith.com/live-feed-api
    contact:
      - FN: BuiltWith Support
        url: https://builtwith.com/contact
  - name: BuiltWith Company to URL API
    description: Resolve company names to their associated domain names in JSON and XML formats.
    humanURL: https://api.builtwith.com/company-to-url
    baseURL: https://api.builtwith.com/ctu3
    tags:
      - Company Lookup
      - Domain Resolution
      - Lead Generation
    properties:
      - type: Documentation
        url: https://api.builtwith.com/company-to-url
    contact:
      - FN: BuiltWith Support
        url: https://builtwith.com/contact
  - name: BuiltWith Tags API
    description: Retrieve related domains associated with IPs and other website attributes.
    humanURL: https://api.builtwith.com/tags-api
    baseURL: https://api.builtwith.com/tag1
    tags:
      - IP Lookup
      - Domain Tags
      - Attribution
    properties:
      - type: Documentation
        url: https://api.builtwith.com/tags-api
    contact:
      - FN: BuiltWith Support
        url: https://builtwith.com/contact
  - name: BuiltWith Recommendations API
    description: Get technology suggestions based on a website's existing technology profile.
    humanURL: https://api.builtwith.com/recommendations-api
    baseURL: https://api.builtwith.com/rec1
    tags:
      - Recommendations
      - Technology Suggestions
      - Intelligence
    properties:
      - type: Documentation
        url: https://api.builtwith.com/recommendations-api
    contact:
      - FN: BuiltWith Support
        url: https://builtwith.com/contact
  - name: BuiltWith Keywords API
    description: Find websites that use specific keywords in their content.
    humanURL: https://api.builtwith.com/keywords-api
    baseURL: https://api.builtwith.com/kw2
    tags:
      - Keyword Search
      - Content Intelligence
      - Lead Generation
    properties:
      - type: Documentation
        url: https://api.builtwith.com/keywords-api
    contact:
      - FN: BuiltWith Support
        url: https://builtwith.com/contact
  - name: BuiltWith Keyword Search API
    description: Search websites by keyword content returning results in JSON and CSV formats.
    humanURL: https://api.builtwith.com/keyword-search-api
    baseURL: https://api.builtwith.com/kws1
    tags:
      - Keyword Search
      - Content Discovery
      - Lead Generation
    properties:
      - type: Documentation
        url: https://api.builtwith.com/keyword-search-api
    contact:
      - FN: BuiltWith Support
        url: https://builtwith.com/contact
  - name: BuiltWith Vector Search API
    description: Text-based technology searches using vector embeddings for semantic similarity matching.
    humanURL: https://api.builtwith.com/vector-search-api
    baseURL: https://api.builtwith.com/vector/v1
    tags:
      - Vector Search
      - AI
      - Semantic Search
    properties:
      - type: Documentation
        url: https://api.builtwith.com/vector-search-api
    contact:
      - FN: BuiltWith Support
        url: https://builtwith.com/contact
  - name: BuiltWith Redirects API
    description: Access website redirect chain data to understand domain redirect patterns.
    humanURL: https://api.builtwith.com/redirects-api
    baseURL: https://api.builtwith.com/redirect1
    tags:
      - Redirects
      - Domain Intelligence
      - Website Data
    properties:
      - type: Documentation
        url: https://api.builtwith.com/redirects-api
    contact:
      - FN: BuiltWith Support
        url: https://builtwith.com/contact
  - name: BuiltWith Product API
    description: eCommerce product lookup for identifying products and merchants across the web.
    humanURL: https://api.builtwith.com/product-api
    baseURL: https://api.builtwith.com/productv1
    tags:
      - eCommerce
      - Product Intelligence
      - Retail
    properties:
      - type: Documentation
        url: https://api.builtwith.com/product-api
    contact:
      - FN: BuiltWith Support
        url: https://builtwith.com/contact
  - name: BuiltWith Trust API
    description: Website trustworthiness assessment providing reliability and safety scores for domains.
    humanURL: https://api.builtwith.com/trust-api
    baseURL: https://api.builtwith.com/trustv1
    tags:
      - Trust Score
      - Safety
      - Domain Intelligence
    properties:
      - type: Documentation
        url: https://api.builtwith.com/trust-api
    contact:
      - FN: BuiltWith Support
        url: https://builtwith.com/contact
  - name: BuiltWith Financial API
    description: Access financial data from SEC Edgar and UK Companies House filings for domains, including revenue, assets, and equity data.
    humanURL: https://api.builtwith.com/financial-api
    baseURL: https://api.builtwith.com/financial1
    tags:
      - Financial Data
      - SEC Filings
      - Companies House
      - Business Intelligence
    properties:
      - type: Documentation
        url: https://api.builtwith.com/financial-api
    contact:
      - FN: BuiltWith Support
        url: https://builtwith.com/contact
  - name: BuiltWith Bulk Domain API
    description: Batch domain processing for high-volume technology lookups across large domain lists.
    humanURL: https://api.builtwith.com/bulk-domain-api
    baseURL: https://api.builtwith.com/v22/domain
    tags:
      - Bulk Processing
      - Batch API
      - High Volume
    properties:
      - type: Documentation
        url: https://api.builtwith.com/bulk-domain-api
    contact:
      - FN: BuiltWith Support
        url: https://builtwith.com/contact
  - name: BuiltWith MCP API
    description: Model Context Protocol server integration enabling AI assistants to query BuiltWith technology detection data natively.
    humanURL: https://api.builtwith.com/mcp-api
    baseURL: https://api.builtwith.com
    tags:
      - MCP
      - AI Integration
      - Model Context Protocol
    properties:
      - type: Documentation
        url: https://api.builtwith.com/mcp-api
      - type: GitHubRepository
        url: https://github.com/builtwith/mcp
    contact:
      - FN: BuiltWith Support
        url: https://builtwith.com/contact
  - name: BuiltWith Agent Payment API
    description: Autonomous credit management API enabling AI agents to manage and replenish API credits programmatically.
    humanURL: https://api.builtwith.com/agent-payment-api
    baseURL: https://api.builtwith.com
    tags:
      - AI Agents
      - Payments
      - Credits
      - Autonomous
    properties:
      - type: Documentation
        url: https://api.builtwith.com/agent-payment-api
    contact:
      - FN: BuiltWith Support
        url: https://builtwith.com/contact
common:
  - type: Website
    url: https://builtwith.com/
  - type: Documentation
    url: https://api.builtwith.com/
  - type: GitHubOrg
    url: https://github.com/builtwith
  - type: LinkedIn
    url: https://www.linkedin.com/company/builtwith
  - type: Blog
    url: https://blog.builtwith.com/
  - type: Pricing
    url: https://builtwith.com/plans
  - type: X
    url: https://x.com/builtwith
  - type: KnowledgeBase
    url: https://kb.builtwith.com/
  - type: PostmanWorkspace
    url: https://www.postman.com/builtwithcom/builtwith/overview
  - type: Plans
    url: plans/builtwith-plans-pricing.yml
  - type: RateLimits
    url: rate-limits/builtwith-rate-limits.yml
  - type: FinOps
    url: finops/builtwith-finops.yml
maintainers:
  - FN: Kin Lane
    email: kin@apievangelist.com