{"id":"4a11c62e-e926-4029-a2d8-3c02e525984e","shortId":"7FPvDP","kind":"x402","title":"x402-gated loan data endpoint on Base, pay $0.02 per request in USDC.","tagline":"x402-gated loan data endpoint on Base, pay $0.02 per request in USDC.","description":"This endpoint at lowpaymentfee.com provides access to a specific loan resource (loan ID 87) behind an x402 paywall. The provider operates a broad catalog of pay-per-request APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities, all priced at $0.02 per call and settled in USDC on the Base network. No API keys, rate limits, or upfront commitments are required — callers simply attach an x402 payment header to each request.\n\nThe specific endpoint `/api/v1/loans/87` is listed under the title \"Premium API Access\" but its exact response payload is undocumented. The x402 challenge confirms it accepts POST requests, returns application/json, and requires up to 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. The payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout.\n\nDocumentation is extremely sparse — the /docs, /pricing, /api, and /README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI spec, no response schema, and no example payloads available. The endpoint is confirmed live (402 challenge returned successfully), but the lack of documentation makes it difficult to know what data is actually returned or what POST body (if any) is expected.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","loan-data","json-response","no-api-key"],"categories":["finance","data"],"synonyms":["loan API","x402 API","pay-per-call API","USDC micropayment API","Base network API","lowpaymentfee","loan data endpoint","crypto payment API"],"warnings":["No documentation available — /docs, /pricing, /api, and /README pages all show only 'Connect wallet'","No OpenAPI or response schema provided; the actual response format is unknown","The endpoint /api/v1/loans/87 is not listed among the provider's advertised API catalog, making its purpose unclear","No example request or response bodies available","POST body requirements (if any) are undocumented"],"endpointUrl":"https://lowpaymentfee.com/api/v1/loans/87","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/87","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, confirming pricing and network. However, there is no OpenAPI spec, no response schema, no example payloads, and all documentation pages are empty beyond a wallet-connect prompt. The specific purpose of /api/v1/loans/87 is unclear — it does not appear in the provider's own listed catalog. This is effectively a stub 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'/api/v1/loans/87':106 '/docs':171 '/pricing':172 '/readme':175 '0.02':10,24,72,148 '000':137 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':160 '0x8335':142 '20':136 '2913':143 '300':163 '402':206 '6':152 '87':42 'Base network API' 'USDC micropayment API' 'accept':127 'access':34,114 'actual':223 'address':159 'ai/ml':62 'analyt':61 'api':58,84,113 'application/json':131 'attach':95 'avail':200 'base':8,22,81,138,145 'base-network' 'behind':43 'bodi':228 'broad':51 'call':74 'caller':93 'catalog':52 'challeng':124,207 'commit':90 'confirm':125,204 'connect':181 'content':187 'crypto payment API' 'data':5,19,60,65,221 'decim':153 'difficult':217 'document':166,214 'endpoint':6,20,30,105,202 'equal':147 'exact':117 'exampl':198 'expect':232 'extrem':168 'finance/web3':64 'gate':3,17 'given':149 'header':99 'id':41 'infer':63 'infrastructur':67 'json-response' 'key':85 'know':219 'lack':212 'limit':87 'list':108 'live':205 'loan':4,18,38,40 'loan API' 'loan data endpoint' 'loan-data' 'lowpaymentfee' 'lowpaymentfee.com':32 'make':215 'network':82 'no-api-key' 'openapi':191 'oper':49 'page':176 'pay':9,23,55 'pay-per-call API' 'pay-per-request':54 'payload':119,199 'payment':98,155 'paywal':46 'per':11,25,56,73 'post':128,227 'premium':112 'price':70 'prompt':183 'provid':33,48 'rate':86 'render':178 'request':12,26,57,102,129 'requir':92,133 'resourc':39 'respons':118,194 'return':130,208,224 'schema':195 'second':164 'sent':157 'settl':76 'simpli':94 'span':59 'spars':169 'spec':192 'specif':37,104 'success':209 'timeout':165 'titl':111 'undocu':121 'unit':139 'upfront':89 'usdc':14,28,78,141,150 'usdc-settlement' 'util':68 'wallet':182 'x402':2,16,45,97,123 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"4a106da5-87a1-4c85-ada9-a27d8a8ec660","listingId":"4a11c62e-e926-4029-a2d8-3c02e525984e","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/87","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:48:00.891Z"}],"sources":[{"listingId":"4a11c62e-e926-4029-a2d8-3c02e525984e","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/loans/87","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:48:00.891Z","lastSeenAt":"2026-04-28T10:33:35.753Z"}],"details":{"listingId":"4a11c62e-e926-4029-a2d8-3c02e525984e","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/loans/87 \\\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 x402 challenge requires 20000 base units of USDC on Base (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913), equaling $0.02","source_url":"https://lowpaymentfee.com/api/v1/loans/87"},{"claim":"The provider advertises $0.02 per request with no API keys, no rate limits, and instant access on the Base network","source_url":"https://lowpaymentfee.com"},{"claim":"Documentation pages (/docs, /pricing, /api, /README) render only a 'Connect wallet' prompt","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieving loan record details via a single micropayment","Programmatic access to loan data without API key management","Agent-driven financial data retrieval with on-chain settlement"],"bestFor":["Developers wanting keyless, pay-per-use loan data access","AI agents that can settle x402 payments in USDC on Base","Prototyping micropayment-gated API workflows"],"notFor":["Users needing detailed API documentation or response schemas before integrating","High-volume batch retrieval where per-request pricing may add up","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:13.983Z"},"updatedAt":"2026-04-28T10:33:35.753Z"}}