Technical and passive OSINT · Hosted free and open-data sources
BuiltWith Free API
Licence or access: key, hosted free endpoint
- status access
- key, hosted free endpoint
- i o and fit
- root domain → technology group/category counts and first/last indexed dates
- current limitations and safe interpretation
- 1 request/second; not the paid detailed technology inventory; root domains only
- official source
- Free API
Official sources
- Free API https://api.builtwith.com/free-api
Catalogued at the 2026-09-01 research baseline. Verify the licence, free-tier limits, API schema and source terms again before deployment, and record a version-pinned registry entry for whatever you select.