BuiltWith API

JSON and XML Data APIs

Domain API

Provides access to the current and historical technology information of a website and additional meta data where available.

Bulk Domain API

Domain API but delivered as bulk compressed JSONL files allowing very high throughput and processing.

Free API

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

Lists API

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

Relationships API

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

Tags API

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

Social API

XML and JSON lists of domains related to their social media profile URLs.

Redirects API

Live and historical website redirects data.

Keywords API

Lists of websites using specific keywords.

Trends API

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

Company to URL API

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

Dedicated Domain Live API

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

Trust API

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


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


BuiltWith Firehose allows you to do large scale live technology lookups across hundreds of millions of websites in minutes.