{"id":"f93b73b3-de38-4549-9d1a-91282ed18729","shortId":"C5dFKn","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/8` is part of the lowpaymentfee.com platform, which offers a collection of pay-per-request APIs spanning data & analytics, AI/ML, finance/Web3, and infrastructure utilities. All endpoints use the x402 payment protocol, settling in USDC on the Base network. The specific resource at `/api/v1/loans/8` is labeled \"Premium API Access\" and accepts POST requests.\n\nThe x402 challenge confirms the endpoint is live, requiring a maximum payment of 20,000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base). Since USDC uses 6 decimals, this translates to $0.02 per request, consistent with the platform's uniform $0.02/request pricing. Payment is made via the `X-PAYMENT` header with the \"exact\" scheme. No API keys are required; access is instant upon payment. The platform advertises no rate limits and no minimum commitments.\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 schema, no request/response examples, and no description of what the `/api/v1/loans/8` endpoint actually returns. The path suggests loan-related financial data (possibly a specific loan record with ID 8), but this is purely inferred from the URL structure. Without documentation or sample responses, the actual payload and use case remain unclear.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","post-endpoint","financial-data"],"categories":["finance","data"],"synonyms":["loan data API","x402 micropayment API","USDC pay-per-call","Base network API","lowpaymentfee","crypto payment API","loan endpoint"],"warnings":["No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet'","No OpenAPI or output schema describing request parameters or response format","The purpose of /api/v1/loans/8 is unclear — 'Premium API Access' is a generic label applied across the platform","Cannot verify what data is actually returned without making a paid request"],"endpointUrl":"https://lowpaymentfee.com/api/v1/loans/8","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/8","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 with clear pricing, but there is zero documentation on request format, response schema, or what data the loans/8 endpoint actually provides. Docs pages are empty beyond a wallet connect prompt. The listing is effectively a 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'/request':17,34,131 '0.02':16,33,121,130 '000':105 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':110 '20':104 '6':116 '8':221 'Base network API' 'USDC pay-per-call' 'accept':88 'access':86,151 'actual':204,237 'advertis':158 'ai/ml':58 'analyt':57 'api':54,85,147,172 'base':9,26,75,106,112 'base-network' 'call':4,21 'case':241 'challeng':93 'collect':48 'commit':165 'confirm':94 'connect':181 'consist':124 'content':187 'crypto payment API' 'data':6,23,56,213 'decim':117 'descript':198 'doc':171 'document':166,232 'endpoint':7,24,36,64,96,203 'exact':144 'exampl':195 'extrem':168 'finance/web3':59 'financi':212 'financial-data' 'header':141 'id':220 'infer':226 'infrastructur':61 'instant':153 'key':148 'label':83 'limit':161 'live':98 'loan':5,22,210,217 'loan data API' 'loan endpoint' 'loan-rel':209 'lowpaymentfee' 'lowpaymentfee.com':43 'made':135 'maximum':101 'minimum':164 'network':76 'no-api-key' 'offer':46 'openapi':191 'page':176 'part':40 'path':207 'pay':2,19,51 'pay-per-cal':1,18 'pay-per-request':50 'payload':238 'payment':68,102,133,140,155 'per':3,20,52,122 'platform':44,127,157 'possibl':214 'post':89 'post-endpoint' 'premium':84 'price':132,173 'prompt':183 'protocol':69 'pure':225 'rate':160 'readm':175 'record':218 'relat':211 'remain':242 'render':178 'request':53,90,123 'request/response':194 'requir':99,150 'resourc':79 'respons':235 'return':205 'sampl':234 'schema':192 'scheme':145 'settl':12,29,70 'sinc':113 'span':55 'spars':169 'specif':78,216 'structur':230 'substant':186 'suggest':208 'translat':119 'unclear':243 'uniform':129 'unit':107 'upon':154 'url':229 'usdc':14,31,72,109,114 'usdc-settlement' 'use':65,115,240 'util':62 'via':10,27,136 'wallet':182 'without':231 'x':139 'x-payment':138 'x402':11,28,67,92 'x402 micropayment API' 'x402-payment'","prices":[{"id":"0877c4d7-d375-4ffb-a5a2-af3cc8408cbe","listingId":"f93b73b3-de38-4549-9d1a-91282ed18729","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/8","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:48:02.736Z"}],"sources":[{"listingId":"f93b73b3-de38-4549-9d1a-91282ed18729","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/loans/8","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:48:02.736Z","lastSeenAt":"2026-04-28T10:33:35.796Z"}],"details":{"listingId":"f93b73b3-de38-4549-9d1a-91282ed18729","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/loans/8 \\\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":"Uniform pricing of $0.02 per request across all endpoints","source_url":"https://lowpaymentfee.com"},{"claim":"No API keys, no rate limits, instant access, Base network","source_url":"https://lowpaymentfee.com"},{"claim":"x402 challenge returns maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/loans/8"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/loans/8"}],"useCases":["Retrieving loan-related financial data on a per-request basis","Integrating pay-per-call financial endpoints into agent workflows","Accessing premium data without API key registration"],"bestFor":["Agents or developers wanting keyless, pay-per-call access to financial data","x402-compatible wallets and clients on Base","Low-volume or sporadic data retrieval where subscriptions are unnecessary"],"notFor":["Users who need detailed API documentation or response schemas before integrating","High-volume batch data retrieval where per-request pricing adds up","Anyone without a Base-network USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:13.925Z"},"updatedAt":"2026-04-28T10:33:35.796Z"}}