Quick free-tier tech-stack summary for any domain via BuiltWith, paid per call with pathUSD on Tempo.
What it does
The BuiltWith Free Summary endpoint provides a lightweight technology profile for a given domain. It is one of twelve BuiltWith endpoints exposed through the Locus MPP (Micropayment Protocol) gateway. You POST a JSON body containing a domain name and receive a summary of the technologies detected on that site. This is the cheapest tier in the BuiltWith MPP suite, priced at 15,000 base units of pathUSD (i.e., $0.015 per call, settled on Tempo L2).
The broader BuiltWith MPP service covers domain lookups, technology lists, domain relationships, company-to-URL resolution, tags, product search, recommendations, redirects, keywords, trends, and trust signals — all accessible at sibling paths under the same host. The paid endpoints range from $0.015 (Free Summary) to $0.055 (Domain Lookup, Lists, Relationships, etc.). All endpoints use the POST method and accept JSON request bodies.
Note that the probe only tested HEAD and GET against this endpoint and received 404s; the OpenAPI spec declares POST as the supported method, so the endpoint is likely live when called correctly. No response schema or example responses were available in the crawled material, so the exact shape of the returned data is unknown. Documentation references point to https://api.builtwith.com and https://beta.paywithlocus.com/mpp/builtwith.md for further details.
Capabilities
Use cases
- —Quickly check what technologies a competitor's website uses before a sales call
- —Enrich CRM records with technology stack data for lead scoring
- —Automate tech-stack audits across a portfolio of domains
- —Feed domain technology signals into an AI agent's research pipeline
Fit
Best for
- —Sales and marketing teams needing lightweight tech-stack intel
- —AI agents that need per-call, no-subscription access to BuiltWith data
- —Developers prototyping integrations before committing to a full BuiltWith plan
Not for
- —Bulk technology list exports (use the /builtwith/lists endpoint instead at $0.055/call)
- —Detailed domain profiling with PII, meta, and attribute data (use /builtwith/domain)
- —Users who cannot settle payments via Tempo L2 / pathUSD
Quick start
curl -X POST https://builtwith.mpp.paywithlocus.com/builtwith/free \
-H "Content-Type: application/json" \
-d '{"LOOKUP": "example.com"}'Example
Request
{
"LOOKUP": "example.com"
}Endpoint
Quality
The OpenAPI spec is well-structured with clear request schemas and pricing for all 12 endpoints, but no response schemas or example responses are provided. The probe only tested HEAD/GET (returning 404) while the spec declares POST, so liveness is not confirmed but likely. No crawled documentation was retrievable.
Warnings
- —Probe tested HEAD and GET only; endpoint requires POST per the OpenAPI spec, so 404 results do not confirm the endpoint is down but liveness is unverified.
- —No response schema or example response is available — the shape of returned data is unknown.
- —Currency address 0x20c000000000000000000000b9537d11c60e8b50 is assumed to be pathUSD with 6 decimals based on the Tempo/MPP convention; if decimals differ, the stated price ($0.015) would be wrong.
- —External docs at https://beta.paywithlocus.com/mpp/builtwith.md and https://api.builtwith.com were not crawled.
Citations
- —The /builtwith/free endpoint accepts POST with a required LOOKUP field and charges 15000 base units via Tempo.https://builtwith.mpp.paywithlocus.com
- —BuiltWith covers technology profiling across 100M+ websites.https://builtwith.mpp.paywithlocus.com
- —Documentation references point to https://api.builtwith.com and https://beta.paywithlocus.com/mpp/builtwith.md.https://builtwith.mpp.paywithlocus.com