{"id":"5c4b1d95-7362-4869-b94f-eb232df05656","shortId":"vYAAp5","kind":"x402","title":"Mortgage data endpoint on Base, pay-per-call via x402 with USDC.","tagline":"Mortgage data endpoint on Base, pay-per-call via x402 with USDC.","description":"This endpoint at `/api/v1/mortgages/95` is part of the lowpaymentfee.com platform, which offers a broad catalog of pay-per-request APIs settled via the x402 protocol on the Base network using USDC. The specific endpoint appears to serve mortgage-related data (resource ID 95), though the exact response schema and input parameters are not documented in the available crawl material. The endpoint is live and returns a valid x402 challenge on POST requests.\n\nThe platform advertises a flat $0.02 per request across its API catalog. The x402 challenge for this endpoint shows a `maxAmountRequired` of 20,000 base units of USDC (the asset at `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913` on Base), which equals $0.02 given USDC's 6 decimal places. No API keys or rate limits are required; callers simply attach an x402 payment header to each request. The payment timeout is 300 seconds.\n\nThe broader lowpaymentfee.com platform lists endpoints across data & analytics, AI & machine learning, finance & Web3, and infrastructure categories. However, the `/api/v1/mortgages/95` endpoint is not listed on the homepage catalog, and no dedicated documentation for it was found. The docs, pricing, API, and README pages all returned only a \"Connect wallet\" prompt with no substantive content. As a result, the exact input format, response schema, and mortgage data coverage remain unknown.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","mortgage-data","pay-per-request","no-api-key"],"categories":["finance"],"synonyms":["mortgage API","mortgage data","home loan data","real estate finance API","lowpaymentfee","x402 mortgage","USDC pay-per-call"],"warnings":["The /api/v1/mortgages/95 endpoint is not listed in the provider's public API catalog—its purpose and data coverage are unclear.","No documentation, input schema, or response schema is available for this endpoint.","All documentation pages (docs, pricing, API, README) returned only a 'Connect wallet' prompt with no content.","The meaning of resource ID '95' in the URL path is unknown."],"endpointUrl":"https://lowpaymentfee.com/api/v1/mortgages/95","protocol":"x402","transport":"http","auth":{"type":"x402","details":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","scheme":"exact","network":"base","mimeType":"application/json","resource":"https://lowpaymentfee.com/api/v1/mortgages/95","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live and returns a valid x402 challenge, but there is no documentation for the /api/v1/mortgages/95 route—no input schema, no response schema, no examples. The endpoint is not even listed on the provider's homepage catalog. Docs pages are empty. This is effectively a stub 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'0.02':106,137 '000':124 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':132 '20':123 '300':166 '6':141 '95':71 'USDC pay-per-call' 'across':109,174 'advertis':103 'ai':177 'analyt':176 'api':47,111,145,207 'appear':62 'asset':130 'attach':154 'avail':85 'base':5,18,55,125,134 'base-network' 'broad':40 'broader':169 'call':9,22 'caller':152 'catalog':41,112,195 'categori':184 'challeng':97,115 'connect':215 'content':221 'coverag':234 'crawl':86 'data':2,15,68,175,233 'decim':142 'dedic':198 'doc':205 'document':82,199 'endpoint':3,16,28,61,89,118,173,188 'equal':136 'exact':74,226 'financ':180 'flat':105 'format':228 'found':203 'given':138 'header':158 'home loan data' 'homepag':194 'howev':185 'id':70 'infrastructur':183 'input':78,227 'key':146 'learn':179 'limit':149 'list':172,191 'live':91 'lowpaymentfee' 'lowpaymentfee.com':35,170 'machin':178 'materi':87 'maxamountrequir':121 'mortgag':1,14,66,232 'mortgage API' 'mortgage data' 'mortgage-data' 'mortgage-rel':65 'network':56 'no-api-key' 'offer':38 'page':210 'paramet':79 'part':32 'pay':7,20,44 'pay-per-cal':6,19 'pay-per-request':43 'payment':157,163 'per':8,21,45,107 'place':143 'platform':36,102,171 'post':99 'price':206 'prompt':217 'protocol':52 'rate':148 'readm':209 'real estate finance API' 'relat':67 'remain':235 'request':46,100,108,161 'requir':151 'resourc':69 'respons':75,229 'result':224 'return':93,212 'schema':76,230 'second':167 'serv':64 'settl':48 'show':119 'simpli':153 'specif':60 'substant':220 'though':72 'timeout':164 'unit':126 'unknown':236 'usdc':13,26,58,128,139 'usdc-settlement' 'use':57 'valid':95 'via':10,23,49 'wallet':216 'web3':181 'x402':11,24,51,96,114,156 'x402 mortgage' 'x402-payment'","prices":[{"id":"dc9981e5-b030-40af-87e1-291821962a72","listingId":"5c4b1d95-7362-4869-b94f-eb232df05656","amountUsd":null,"unit":"per_call","nativeCurrency":"USD COIN","nativeAmount":"20000","chain":"base","payTo":"0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","paymentMethod":"x402-usd coin","isPrimary":true,"details":{"scheme":"exact","mime_type":"application/json","accepts_all":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","scheme":"exact","network":"base","mimeType":"application/json","resource":"https://lowpaymentfee.com/api/v1/mortgages/95","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:48:24.583Z"}],"sources":[{"listingId":"5c4b1d95-7362-4869-b94f-eb232df05656","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/mortgages/95","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:48:24.583Z","lastSeenAt":"2026-04-29T05:06:25.898Z"}],"details":{"listingId":"5c4b1d95-7362-4869-b94f-eb232df05656","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/mortgages/95 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-token>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The x402 challenge shows maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/mortgages/95"},{"claim":"USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/mortgages/95"},{"claim":"Platform advertises $0.02 per request, no API keys, no rate limits","source_url":"https://lowpaymentfee.com"},{"claim":"The homepage lists endpoints across data & analytics, AI & ML, finance & Web3, and infrastructure categories but does not list /api/v1/mortgages/95","source_url":"https://lowpaymentfee.com"}],"useCases":["Retrieving mortgage-related data for a specific resource (ID 95)","Integrating mortgage information into financial dashboards or agent workflows","Programmatic access to mortgage data without API key management"],"bestFor":["Agents or apps needing on-demand mortgage data with crypto micropayments","Developers who want keyless, pay-per-call API access on Base","Workflows requiring low-friction financial data retrieval"],"notFor":["Users who need detailed documentation or guaranteed SLAs before integrating","Bulk mortgage data downloads or batch processing (no documented batch endpoint)","Users without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:12.866Z"},"updatedAt":"2026-04-29T05:06:25.898Z"}}