BuiltWith

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-images.s3.amazonaws.com/shared/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