BuiltWith Technology Profiler (Free Tier) via Locus x402 is a paid API for AI agents from builtwith.x402.paywithlocus.com, paid per call via x402, $0.015/call, status unknown (last checked 2026-09-14).
Profiles a website's technology stack using BuiltWith data, detecting frameworks, analytics tools, CDNs, CMSs, and hundreds of other technologies used by a given domain.
Technology profiling for websites — detect tech stacks, find sites using specific technologies, discover domain relationships, trends, and competitive intelligence across 100M+ websites.
Returns a JSON object containing detected technologies for the queried domain, including categories such as CMS, frontend frameworks, analytics platforms, CDN providers, advertising tools, and other third-party integrations, drawn from BuiltWith's database of 100M+ websites. Also includes payment metadata (settled USDC amount) and a request tracking ID.
POSThttps://builtwith.x402.paywithlocus.com/builtwith/freeUse this endpoint when you need to quickly identify what technologies a specific website uses, especially for competitive intelligence, sales prospecting, or technical due diligence. Prefer this free-tier endpoint for single-domain lookups at low cost ($0.015 USDC). Choose BuiltWith over manual inspection when you need structured, categorized tech-stack data across hundreds of technology categories without crawling the site yourself.
| Field | Type | Description |
|---|---|---|
| LOOKUP | string |
{
"type": "json",
"example": {
"data": {},
"payment": {
"scheme": "exact",
"settledUsdc": "0.001000",
"authorizedMaxUsdc": "0.001000"
},
"request": {
"id": "00000000-0000-4000-8000-000000000000",
"statusUrl": "/requests/00000000-0000-4000-8000-000000000000"
},
"success": true
}
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