{"id":"68baed70-cb5c-4a60-90a1-c5a970153e3f","shortId":"ReWu35","kind":"x402","title":"Pay-per-call loan data endpoint on Base via x402, settled in USDC at $0.02/request.","tagline":"Pay-per-call loan data endpoint on Base via x402, settled in USDC at $0.02/request.","description":"This endpoint at `/api/v1/loans/66` is part of the lowpaymentfee.com platform, which offers a collection of pay-per-request APIs spanning data analytics, AI/ML inference, finance, crypto, and utility services. All endpoints use the x402 payment protocol, settling in USDC on the Base network. The specific resource at `/loans/66` is labeled \"Premium API Access\" and appears to serve loan-related data, though the exact response schema and input parameters are not documented in the available crawl material.\n\nThe x402 challenge confirms the endpoint is live, accepting POST requests with a maximum payment of 20,000 base units of USDC (0.02 USD, since USDC uses 6 decimals) per call. Payment is made to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` on Base, with a 300-second timeout. The platform advertises no API keys, no rate limits, and instant access — you simply attach an x402 payment header to each request.\n\nDocumentation is extremely sparse. The docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI spec, no request/response schema, and no description of what the `/loans/66` endpoint actually returns. The endpoint path suggests it retrieves or processes data for a specific loan (ID 66), but the exact semantics — whether this is a financial calculator, a DeFi loan lookup, or something else — cannot be confirmed from available sources.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","loan-data","post-method","no-api-key"],"categories":["finance","data"],"synonyms":["loan API","x402 loan endpoint","pay-per-call API","USDC micropayment API","Base network API","lowpaymentfee","loan data service","crypto payment API"],"warnings":["No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no content","No OpenAPI or request/response schema provided; input parameters and output format are unknown","The purpose of /api/v1/loans/66 is unclear — 'Premium API Access' is a generic label that does not describe the data returned","The /loans/66 path is not listed among the advertised APIs on the homepage, raising questions about whether it is a production endpoint"],"endpointUrl":"https://lowpaymentfee.com/api/v1/loans/66","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/loans/66","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is confirmed live via a valid 402 challenge, and pricing is clear ($0.02 USDC per request). However, there is no documentation, no OpenAPI spec, no request/response schema, and no explanation of what the /loans/66 endpoint actually returns. This is effectively a stub 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'/loans/66':83,215 '/request':17,34 '0.02':16,33,135 '000':130 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':149 '20':129 '300':154 '6':140 '66':233 'Base network API' 'USDC micropayment API' 'accept':121 'access':88,168 'actual':217 'address':148 'advertis':159 'ai/ml':58 'analyt':57 'api':54,87,161,185 'appear':90 'attach':171 'avail':110,255 'base':9,26,77,131,151 'base-network' 'calcul':243 'call':4,21,143 'cannot':251 'challeng':115 'collect':48 'confirm':116,253 'connect':194 'content':200 'crawl':111 'crypto':61 'crypto payment API' 'data':6,23,56,96,227 'decim':141 'defi':245 'descript':211 'doc':184 'document':107,179 'els':250 'endpoint':7,24,36,66,118,216,220 'exact':99,236 'extrem':181 'financ':60 'financi':242 'header':175 'id':232 'infer':59 'input':103 'instant':167 'key':162 'label':85 'limit':165 'live':120 'loan':5,22,94,231,246 'loan API' 'loan data service' 'loan-data' 'loan-rel':93 'lookup':247 'lowpaymentfee' 'lowpaymentfee.com':43 'made':146 'materi':112 'maximum':126 'network':78 'no-api-key' 'offer':46 'openapi':204 'page':189 'paramet':104 'part':40 'path':221 'pay':2,19,51 'pay-per-cal':1,18 'pay-per-call API' 'pay-per-request':50 'payment':70,127,144,174 'per':3,20,52,142 'platform':44,158 'post':122 'post-method' 'premium':86 'price':186 'process':226 'prompt':196 'protocol':71 'rate':164 'readm':188 'relat':95 'render':191 'request':53,123,178 'request/response':207 'resourc':81 'respons':100 'retriev':224 'return':218 'schema':101,208 'second':155 'semant':237 'serv':92 'servic':64 'settl':12,29,72 'simpli':170 'sinc':137 'someth':249 'sourc':256 'span':55 'spars':182 'spec':205 'specif':80,230 'substant':199 'suggest':222 'though':97 'timeout':156 'unit':132 'usd':136 'usdc':14,31,74,134,138 'usdc-settlement' 'use':67,139 'util':63 'via':10,27 'wallet':195 'whether':238 'x402':11,28,69,114,173 'x402 loan endpoint' 'x402-payment'","prices":[{"id":"5d5c8c6e-401f-4f0a-9b9b-4301a0b915e6","listingId":"68baed70-cb5c-4a60-90a1-c5a970153e3f","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/loans/66","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:47:48.242Z"}],"sources":[{"listingId":"68baed70-cb5c-4a60-90a1-c5a970153e3f","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/loans/66","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:47:48.242Z","lastSeenAt":"2026-04-28T11:33:36.281Z"}],"details":{"listingId":"68baed70-cb5c-4a60-90a1-c5a970153e3f","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/loans/66 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/loans/66"},{"claim":"Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/loans/66"},{"claim":"Docs, API, pricing, and README pages render only 'Connect wallet' with no substantive content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieving loan-related data on a per-request payment basis","Integrating pay-per-call financial data into agent workflows","Accessing loan information without API key registration"],"bestFor":["Agents or developers who want keyless, pay-per-call access to loan data","x402-compatible wallets on Base network","Low-volume or sporadic API consumers who prefer no subscriptions"],"notFor":["Users needing detailed API documentation or guaranteed SLAs before integration","High-volume consumers who would benefit from bulk pricing or subscriptions","Anyone requiring non-USDC or non-Base-network payment options"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:14.615Z"},"updatedAt":"2026-04-28T11:33:36.281Z"}}