BuiltWith API

Domain API v25

Provides current and historical website technologies with confidence scores from 0 to 1, plus additional metadata where available.

Documentation
RapidAPI · Postman

JSON

https://api.builtwith.com/v25/api.json?KEY=00000000-0000-0000-0000-000000000000&LOOKUP=hotelscombined.com

XML

https://api.builtwith.com/v25/api.xml?KEY=00000000-0000-0000-0000-000000000000&LOOKUP=hotelscombined.com

CSV

https://api.builtwith.com/v25/api.csv?KEY=00000000-0000-0000-0000-000000000000&LOOKUP=hotelscombined.com

Change API

JSON results of technology additions and removals for domains, including categories, importance and AI-generated business context.

Documentation

JSON

https://api.builtwith.com/change1/api.json?KEY=00000000-0000-0000-0000-000000000000&LOOKUP=hotelscombined.com

JSON

https://api.builtwith.com/change1/api.json?KEY=00000000-0000-0000-0000-000000000000&LOOKUP=hotelscombined.com&SINCE=last+month

Relationships API

XML,JSON, CSV and TSV results of relationships between websites that show what sites are linked together, by what and for how long.

Documentation
Postman

Up to 500 match records per page. Use next_page as PAGE while more_results is true. One API credit per page.

JSON

https://api.builtwith.com/rv5/api.json?KEY=00000000-0000-0000-0000-000000000000&LOOKUP=hotelscombined.com&PAGE=1

XML

https://api.builtwith.com/rv5/api.xml?KEY=00000000-0000-0000-0000-000000000000&LOOKUP=hotelscombined.com&PAGE=1

CSV

https://api.builtwith.com/rv5/api.csv?KEY=00000000-0000-0000-0000-000000000000&LOOKUP=hotelscombined.com&PAGE=1

TSV

https://api.builtwith.com/rv5/api.tsv?KEY=00000000-0000-0000-0000-000000000000&LOOKUP=hotelscombined.com&PAGE=1

Lists API

Provides XML and JSON access to lists of websites using particular web technologies across the entire internet.

Documentation
Postman

JSON

https://api.builtwith.com/lists12/api.json?KEY=00000000-0000-0000-0000-000000000000&TECH=Shopify

XML

https://api.builtwith.com/lists12/api.xml?KEY=00000000-0000-0000-0000-000000000000&TECH=Shopify

TXT

https://api.builtwith.com/lists12/api.txt?KEY=00000000-0000-0000-0000-000000000000&TECH=Shopify

CSV

https://api.builtwith.com/lists12/api.csv?KEY=00000000-0000-0000-0000-000000000000&TECH=Shopify

TSV

https://api.builtwith.com/lists12/api.tsv?KEY=00000000-0000-0000-0000-000000000000&TECH=Shopify

Ask API

Natural language website list lookups. Ask for audiences like Magento websites in Spain and return sample or committed paged results.

Documentation

JSON

https://api.builtwith.com/ask1/api.json?KEY=00000000-0000-0000-0000-000000000000&QUERY=Magento%20websites%20in%20Spain

JSON

https://api.builtwith.com/ask1/api.json?KEY=00000000-0000-0000-0000-000000000000&QUERY=Magento%20websites%20in%20Spain&COMMIT=true

CSV

https://api.builtwith.com/ask1/api.csv?KEY=00000000-0000-0000-0000-000000000000&QUERY=Magento%20websites%20in%20Spain

MCP API

Search and browse the BuiltWith registry of remote MCP servers by keyword or category. Free to use, rate limited to 1 request per second.

Documentation

JSON

https://api.builtwith.com/mcp2/api.json?KEY=00000000-0000-0000-0000-000000000000&SEARCH=payments

JSON

https://api.builtwith.com/mcp2/api.json?KEY=00000000-0000-0000-0000-000000000000&CATEGORY=developer-tools&OFFSET=100

CSV

https://api.builtwith.com/mcp2/api.csv?KEY=00000000-0000-0000-0000-000000000000&SEARCH=payments

JSON

https://api.builtwith.com/mcp2/categories.json

VAT API

Provides VAT, GST, CNPJ and other available company registration numbers for websites.

Documentation

JSON

https://api.builtwith.com/vat1/api.json?KEY=00000000-0000-0000-0000-000000000000&LOOKUP=builtwith.com

XML

https://api.builtwith.com/vat1/api.xml?KEY=00000000-0000-0000-0000-000000000000&LOOKUP=builtwith.com

CSV

https://api.builtwith.com/vat1/api.csv?KEY=00000000-0000-0000-0000-000000000000&LOOKUP=builtwith.com

JSON v2

https://api.builtwith.com/vat2/api.json?KEY=00000000-0000-0000-0000-000000000000&LOOKUP=builtwith.com

Live Feed API

Real-time WebSocket feed of technology detections. Subscribe to specific technologies or receive all new detections.

Documentation

WSS

wss://sync.builtwith.com/wss/new?KEY=00000000-0000-0000-0000-000000000000

WSS

wss://sync.builtwith.com/wss/channel/Shopify?KEY=00000000-0000-0000-0000-000000000000

Free API 🆓

Provides last updated and counts for technology groups and categories for websites.

Documentation
RapidAPI · Postman

JSON

https://api.builtwith.com/free1/api.json?KEY=00000000-0000-0000-0000-000000000000&LOOKUP=hotelscombined.com

XML

https://api.builtwith.com/free1/api.xml?KEY=00000000-0000-0000-0000-000000000000&LOOKUP=hotelscombined.com

Company to URL API

Get domain names from lists of company names you supply to us.

Documentation
RapidAPI · Postman

JSON

https://api.builtwith.com/ctu4/api.json?KEY=00000000-0000-0000-0000-000000000000&COMPANY=hotelscombined

XML

https://api.builtwith.com/ctu4/api.xml?KEY=00000000-0000-0000-0000-000000000000&COMPANY=hotelsombined

Financial API

Provides financial information for websites.

Documentation
RapidAPI · Postman

JSON

https://api.builtwith.com/financial1/api.json?KEY=00000000-0000-0000-0000-000000000000&LOOKUP=robinhood.com

Tags API

XML and JSON lists of related domains to IPs and other site attributes.

Documentation
Postman

JSON

https://api.builtwith.com/tag1/api.json?KEY=00000000-0000-0000-0000-000000000000&LOOKUP=IP-75.126.76.154

XML

https://api.builtwith.com/tag1/api.xml?KEY=00000000-0000-0000-0000-000000000000&LOOKUP=IP-75.126.76.154

Recommendations API

The technology recommendations for websites based on other sites with similar technology profiles.

Documentation
Postman

JSON

https://api.builtwith.com/rec1/api.json?KEY=00000000-0000-0000-0000-000000000000&LOOKUP=hotelscombined.com

XML

https://api.builtwith.com/rec1/api.xml?KEY=00000000-0000-0000-0000-000000000000&LOOKUP=hotelscombined.com

Redirects API

Live and historical website redirects data.

Documentation
Postman

JSON

https://api.builtwith.com/redirect1/api.json?KEY=00000000-0000-0000-0000-000000000000&LOOKUP=hotelscombined.com

XML

https://api.builtwith.com/redirect1/api.xml?KEY=00000000-0000-0000-0000-000000000000&LOOKUP=hotelscombined.com

Keywords API

Lists of websites using specific keywords.

Documentation
Postman

JSON

https://api.builtwith.com/kw2/api.json?KEY=00000000-0000-0000-0000-000000000000&LOOKUP=hotelscombined.com

XML

https://api.builtwith.com/kw2/api.xml?KEY=00000000-0000-0000-0000-000000000000&LOOKUP=hotelscombined.com

Keyword Search API

Search for websites containing specific keywords.

Documentation

JSON

https://api.builtwith.com/kws1/api.json?KEY=00000000-0000-0000-0000-000000000000&KEYWORD=perfume

CSV

https://api.builtwith.com/kws1/api.csv?KEY=00000000-0000-0000-0000-000000000000&KEYWORD=perfume

Vector Search API

Search technologies and categories by text query using vector similarity.

Documentation

JSON

https://api.builtwith.com/vector/v1/api.json?KEY=00000000-0000-0000-0000-000000000000&QUERY=react+framework

XML

https://api.builtwith.com/vector/v1/api.xml?KEY=00000000-0000-0000-0000-000000000000&QUERY=react+framework

Trends API 🆓

XML and JSON access to the technology trends data found on BuiltWith Technology Trends.

Documentation
Postman

JSON

https://api.builtwith.com/trends/v6/api.json?KEY=00000000-0000-0000-0000-000000000000&TECH=Shopify

XML

https://api.builtwith.com/trends/v6/api.xml?KEY=00000000-0000-0000-0000-000000000000&TECH=Shopify

Product API

Use the Product API to find websites selling certain eCommerce products.

Documentation

JSON

https://api.builtwith.com/productv1/api.json?KEY=00000000-0000-0000-0000-000000000000&QUERY=Adidas%20Yeezy

Trust API

Use the Trust API to determine how much a website can be trusted. Useful for fraud detection.

Documentation
RapidAPI · Postman

JSON

https://api.builtwith.com/trustv2/api.json?KEY=00000000-0000-0000-0000-000000000000&LOOKUP=builtwith.com

XML

https://api.builtwith.com/trustv2/api.xml?KEY=00000000-0000-0000-0000-000000000000&LOOKUP=builtwith.com

Bulk Domain API

Drop a bulk list of domains into the frontend or programmatically for fast bulk API access.

Documentation

MCP API

Use BuiltWith API endpoints as MCP tools with an API key, or buy prepaid credit batches with x402 and use one reusable key for lookups.

Documentation MCP Server Github

x402 USDC API

Pay per lookup with USDC on Base, or buy reusable MCP lookup units. No BuiltWith account or API key required.

Documentation

Stripe Credit Top-Up API

For existing accounts: charge a saved Stripe payment method to add account API credits within configured limits. This is not x402.

Documentation

Dedicated Domain Live API

Get detailed live technology usage profiles for websites with your own dedicated end points that provide higher throughput.

Documentation

Datasets

BuiltWith Datasets provide mass access to Internet Technology usage information from 2000 to today.

Documentation

Snowflake - Databricks - Redshift - BigQuery and more

Manage larger technology based datasets in datalakes. We can create custom data products for you based on your requirements or use our datasets product

Documentation

BuiltWith CLI

Non-interactive, scriptable CLI for the BuiltWith API — designed for automation, CI/CD pipelines, and AI agent consumption.

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BuiltWith TUI

A terminal-based user interface for exploring the BuiltWith API. Runs in any terminal — Windows CMD, PowerShell, or Bash.

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Code Examples

Lots of code examples for how to use the BuiltWith API with platforms like Node and Python. As well as some full implementations like Live Feed to Salesforce

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Bots

Explore our bot experiment results and see how BuiltWith consistently identifies websites faster than anyone else.

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BuiltWith API

JSON APIs for Web, Data & AI Systems