{"id":"093b6842-7c47-418a-a58d-dc38f19d7cb9","shortId":"jrg9sH","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/32` 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 32), 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 specific endpoint shows a `maxAmountRequired` of 20,000 base units of USDC (which uses 6 decimals), equating to $0.02 per call — consistent with the site's stated pricing. Payment is made via the x402 exact scheme to a designated wallet on Base. No API keys, rate limits, or upfront commitments are required; access is instant upon payment.\n\nThe provider hosts additional endpoints spanning data analytics, AI/ML inference, finance/crypto data, and utility services, all at the same $0.02 price point. Documentation beyond the landing page is extremely sparse — the /docs, /api, /pricing, and /README pages all render only a \"Connect wallet\" prompt with no substantive content. As a result, the exact request body format and response schema for this mortgage endpoint are 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 API","lowpaymentfee","x402 mortgage","USDC pay-per-call","Base network API"],"warnings":["No documentation available — /docs, /pricing, /api, and /README pages all show only 'Connect wallet' with no content.","Request body format and response schema for /api/v1/mortgages/32 are completely unknown.","The endpoint's actual data content (what 'mortgages/32' returns) is not described anywhere in the crawl material.","This endpoint may involve regulated financial data (mortgages); verify compliance requirements before relying on it."],"endpointUrl":"https://lowpaymentfee.com/api/v1/mortgages/32","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/32","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 on request/response schemas, no OpenAPI spec, and the docs pages are empty. The purpose of the /mortgages/32 endpoint is unclear beyond the generic 'Premium API Access' label. Effectively a stub 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'/api/v1/mortgages/32':30 '/docs':206 '/pricing':208 '/readme':210 '0.02':106,136,194 '000':125 '20':124 '32':71 '6':132 'Base network API' 'USDC pay-per-call' 'access':170 'across':109 'addit':178 'advertis':103 'ai/ml':183 'analyt':182 'api':47,111,161 'appear':62 'avail':85 'base':5,18,55,126,159 'base-network' 'beyond':198 'bodi':229 'broad':40 'call':9,22,138 'catalog':41,112 'challeng':97,115 'commit':167 'connect':216 'consist':139 'content':222 'crawl':86 'data':2,15,68,181,186 'decim':133 'design':156 'document':82,197 'endpoint':3,16,28,61,89,119,179,237 'equat':134 'exact':74,152,227 'extrem':203 'finance/crypto':185 'flat':105 'format':230 'home loan API' 'host':177 'id':70 'infer':184 'input':78 'instant':172 'key':162 'land':200 'limit':164 'live':91 'lowpaymentfee' 'lowpaymentfee.com':35 'made':148 'materi':87 'maxamountrequir':122 'mortgag':1,14,66,236 'mortgage API' 'mortgage data' 'mortgage-data' 'mortgage-rel':65 'network':56 'no-api-key' 'offer':38 'page':201,211 'paramet':79 'part':32 'pay':7,20,44 'pay-per-cal':6,19 'pay-per-request':43 'payment':146,174 'per':8,21,45,107,137 'platform':36,102 'point':196 'post':99 'price':145,195 'prompt':218 'protocol':52 'provid':176 'rate':163 'relat':67 'render':213 'request':46,100,108,228 'requir':169 'resourc':69 'respons':75,232 'result':225 'return':93 'schema':76,233 'scheme':153 'serv':64 'servic':189 'settl':48 'show':120 'site':142 'span':180 'spars':204 'specif':60,118 'state':144 'substant':221 'though':72 'unit':127 'unknown':239 'upfront':166 'upon':173 'usdc':13,26,58,129 'usdc-settlement' 'use':57,131 'util':188 'valid':95 'via':10,23,49,149 'wallet':157,217 'x402':11,24,51,96,114,151 'x402 mortgage' 'x402-payment'","prices":[{"id":"4c499546-d7b3-4650-9d05-65f422e6dfb4","listingId":"093b6842-7c47-418a-a58d-dc38f19d7cb9","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/32","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:48:15.486Z"}],"sources":[{"listingId":"093b6842-7c47-418a-a58d-dc38f19d7cb9","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/mortgages/32","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:48:15.486Z","lastSeenAt":"2026-04-29T05:34:22.166Z"}],"details":{"listingId":"093b6842-7c47-418a-a58d-dc38f19d7cb9","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/mortgages/32 \\\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 platform charges $0.02 per request with no API keys, rate limits, or commitments.","source_url":"https://lowpaymentfee.com"},{"claim":"The x402 challenge shows maxAmountRequired of 20000 base units of USDC on Base network.","source_url":"https://lowpaymentfee.com/api/v1/mortgages/32"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base.","source_url":"https://lowpaymentfee.com/api/v1/mortgages/32"},{"claim":"Docs, pricing, API, and README pages render only a 'Connect wallet' prompt.","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieving mortgage-related data for a specific resource (ID 32)","Integrating mortgage information into financial dashboards or agent workflows","Programmatic access to mortgage data without API key registration"],"bestFor":["Agents or apps needing on-demand mortgage data with crypto micropayments","Developers who want keyless, pay-as-you-go API access on Base","Quick prototyping against a low-cost financial data endpoint"],"notFor":["Users who need detailed API documentation or guaranteed SLAs before integrating","Bulk mortgage data retrieval where per-request pricing would be cost-prohibitive","Users without access to USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:13.278Z"},"updatedAt":"2026-04-29T05:34:22.166Z"}}