{"id":"a8b43ca0-e01b-40c8-9147-976373441e70","shortId":"j7ypyX","kind":"mpp","title":"Extract keywords associated with any domain via BuiltWith's profiling data, paid per call on Tempo L2.","tagline":"Extract keywords associated with any domain via BuiltWith's profiling data, paid per call on Tempo L2.","description":"The BuiltWith Keywords endpoint extracts keyword data associated with a given domain. It is part of a broader BuiltWith API suite exposed through the Locus MPP (Micropayment Protocol) gateway, which covers technology profiling across 100M+ websites. You supply a domain name and receive keyword information that BuiltWith has indexed for that site.\n\nThis specific endpoint (`/builtwith/keywords`) accepts a POST request with a JSON body containing a required `LOOKUP` field (the domain to extract keywords for). Payment is settled per-call via the Tempo L2 method at a cost of 35,000 base units of pathUSD (currency address `0x20c000000000000000000000b9537d11c60e8b50`), which equals $0.035 per request assuming 6 decimals. The endpoint is one of twelve BuiltWith endpoints available through this MPP gateway, with prices ranging from $0.015 (Free Summary) to $0.055 (Domain Lookup, Lists, Relationships, etc.).\n\nThe probe did not capture a 402 challenge on HEAD/GET because this endpoint only responds to POST requests, which is consistent with the OpenAPI spec. The OpenAPI schema is well-defined with clear request parameters. However, no response schema or example responses are documented, so the exact structure of keyword data returned is unknown. Documentation references point to `https://api.builtwith.com` and `https://beta.paywithlocus.com/mpp/builtwith.md` for further details.","tags":["technology-profiling","tech-stack","competitive-intel","domains"],"capabilities":["keyword-extraction","domain-profiling","website-analysis","per-call-payment","tempo-l2-settlement","mpp-protocol"],"categories":["data","search"],"synonyms":["BuiltWith keywords API","domain keyword lookup","website keyword extraction","site keyword profiling","BuiltWith domain keywords","web technology keywords","domain SEO keywords"],"warnings":["Probe did not confirm 402 on POST — endpoint only accepts POST per OpenAPI spec, but HEAD/GET returned 404","No response schema documented — the structure of keyword data returned is unknown","Currency address 0x20c000000000000000000000b9537d11c60e8b50 assumed to be pathUSD with 6 decimals; if different, price calculation would change","External docs at beta.paywithlocus.com/mpp/builtwith.md were not crawled"],"endpointUrl":"https://builtwith.mpp.paywithlocus.com/builtwith/keywords","protocol":"mpp","transport":"http","auth":{"type":"mpp","details":{"realm":"builtwith.mpp.paywithlocus.com","intent":"charge","method":"tempo","service_methods":{"tempo":{"assets":["0x20c000000000000000000000b9537d11c60e8b50"],"intents":["charge"]}}}},"qualityScore":"0.520","qualityRationale":"OpenAPI spec is present with clear request schema and pricing info, but no response schema or example responses are documented. The probe only tested HEAD/GET (which return 404) while the endpoint requires POST, so liveness via 402 challenge was not directly confirmed. No crawled docs provided useful 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'/mpp/builtwith.md':232 '0.015':159 '0.035':136 '0.055':163 '000':126 '0x20c000000000000000000000b9537d11c60e8b50':133 '100m':69 '35':125 '402':175 '6':140 'BuiltWith domain keywords' 'BuiltWith keywords API' 'accept':91 'across':68 'address':132 'api':54 'api.builtwith.com':228 'associ':3,20,42 'assum':139 'avail':150 'base':127 'beta.paywithlocus.com':231 'beta.paywithlocus.com/mpp/builtwith.md':230 'bodi':98 'broader':52 'builtwith':8,25,36,53,81,148 'call':14,31,115 'captur':173 'challeng':176 'clear':202 'consist':189 'contain':99 'cost':123 'cover':65 'currenc':131 'data':11,28,41,220 'decim':141 'defin':200 'detail':235 'document':213,224 'domain':6,23,46,74,105,164 'domain SEO keywords' 'domain keyword lookup' 'domain-profiling' 'endpoint':38,89,143,149,181 'equal':135 'etc':168 'exact':216 'exampl':210 'expos':56 'extract':1,18,39,107 'field':103 'free':160 'gateway':63,154 'given':45 'head/get':178 'howev':205 'index':83 'inform':79 'json':97 'keyword':2,19,37,40,78,108,219 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-X POST https://builtwith.mpp.paywithlocus.com/builtwith/keywords \\\n  -H \"Content-Type: application/json\" \\\n  -d '{\"LOOKUP\": \"example.com\"}'","exampleRequest":{"LOOKUP":"example.com"},"exampleResponse":null,"schema":{"path":"/builtwith/keywords","method":"POST","payment":{"amount":"35000","intent":"charge","method":"tempo","currency":"0x20c000000000000000000000b9537d11c60e8b50","decimals":6,"unitType":"request","description":"Keywords"},"description":"Keywords"},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The /builtwith/keywords endpoint requires a POST with a LOOKUP field and costs 35000 base units via Tempo method","source_url":"https://builtwith.mpp.paywithlocus.com"},{"claim":"BuiltWith covers technology profiling across 100M+ websites","source_url":"https://builtwith.mpp.paywithlocus.com"},{"claim":"API reference docs are at api.builtwith.com and 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