{"id":"02026dfb-ebab-453f-b418-fcc3f4005e23","shortId":"kKgWBT","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/45` is part of the lowpaymentfee.com platform, which offers a broad catalog of pay-per-request APIs spanning data & analytics, AI/ML inference, finance/Web3, and infrastructure utilities. All endpoints use the x402 payment protocol, settling in USDC on the Base network. The specific resource at `/loans/45` is labeled \"Premium API Access\" and accepts HTTP POST requests.\n\nThe x402 challenge confirms the endpoint is live, requiring a maximum payment of 20,000 base units of USDC (0x8335…2913 on Base). Since USDC uses 6 decimals, this translates to $0.02 per request, consistent with the site's advertised flat pricing of $0.02/request across all endpoints. Payment is made to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout.\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 `/loans/45` resource actually returns. The endpoint name \"Premium API Access\" and the path segment \"loans/45\" suggest it may return loan-related financial data for a specific loan ID, but this is speculative. The platform advertises no API keys, no rate limits, and instant access, with all payments handled on-chain via Base.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","http-post","loan-data"],"categories":["finance","data"],"synonyms":["loan API","x402 API","micropayment API","USDC pay-per-call","Base network API","lowpaymentfee","financial data endpoint","web3 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; it is unknown what data this endpoint returns or what request body it expects","The path '/api/v1/loans/45' with the generic title 'Premium API Access' gives no clear indication of the resource's purpose","No robots.txt or agents.txt present"],"endpointUrl":"https://lowpaymentfee.com/api/v1/loans/45","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/45","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. However, there is no documentation, no OpenAPI schema, no request/response examples, and no explanation of what the /loans/45 resource actually returns. The listing is effectively a stub with only payment metadata 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'/loans/45':83,189 '/request':17,34,138 '0.02':16,33,125,137 '000':108 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':147 '0x8335':113 '20':107 '2913':114 '300':150 '6':120 'Base network API' 'USDC pay-per-call' 'accept':90 'access':88,198,233 'across':139 'actual':191 'address':146 'advertis':133,224 'ai/ml':59 'analyt':58 'api':55,87,159,197,226 'base':9,26,77,109,116,242 'base-network' 'broad':48 'call':4,21 'catalog':49 'chain':240 'challeng':96 'confirm':97 'connect':168 'consist':128 'content':174 'data':6,23,57,212 'decim':121 'descript':185 'doc':158 'document':153 'endpoint':7,24,36,66,99,141,194 'exampl':182 'extrem':155 'finance/web3':61 'financi':211 'financial data endpoint' 'flat':134 'handl':237 'http':91 'http-post' 'id':217 'infer':60 'infrastructur':63 'instant':232 'key':227 'label':85 'limit':230 'live':101 'loan':5,22,209,216 'loan API' 'loan-data' 'loan-rel':208 'loans/45':203 'lowpaymentfee' 'lowpaymentfee.com':43 'made':144 'maximum':104 'may':206 'micropayment API' 'name':195 'network':78 'offer':46 'on-chain':238 'openapi':178 'page':163 'part':40 'path':201 'pay':2,19,52 'pay-per-cal':1,18 'pay-per-request':51 'payment':70,105,142,236 'per':3,20,53,126 'platform':44,223 'post':92 'premium':86,196 'price':135,160 'prompt':170 'protocol':71 'rate':229 'readm':162 'relat':210 'render':165 'request':54,93,127 'request/response':181 'requir':102 'resourc':81,190 'return':192,207 'schema':179 'second':151 'segment':202 'settl':12,29,72 'sinc':117 'site':131 'span':56 'spars':156 'specif':80,215 'specul':221 'substant':173 'suggest':204 'timeout':152 'translat':123 'unit':110 'usdc':14,31,74,112,118 'usdc-settlement' 'use':67,119 'util':64 'via':10,27,241 'wallet':169 'web3 API' 'x402':11,28,69,95 'x402 API' 'x402-payment'","prices":[{"id":"89a50f1a-b3d0-497f-bae9-04e94d66124b","listingId":"02026dfb-ebab-453f-b418-fcc3f4005e23","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/45","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:47:40.994Z"}],"sources":[{"listingId":"02026dfb-ebab-453f-b418-fcc3f4005e23","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/loans/45","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:47:40.994Z","lastSeenAt":"2026-04-28T13:33:35.550Z"}],"details":{"listingId":"02026dfb-ebab-453f-b418-fcc3f4005e23","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/loans/45 \\\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 HTTP 402 with an x402 challenge requiring 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/loans/45"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/loans/45"},{"claim":"All endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"The platform offers APIs across data & analytics, AI/ML, finance/Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Retrieving loan-related financial data on a per-request payment basis","Integrating pay-per-call financial endpoints into agent workflows without API keys","Programmatic access to loan information settled via on-chain USDC micropayments"],"bestFor":["Agents or applications needing keyless, pay-per-use financial data access","Developers experimenting with x402 payment protocol integrations","Use cases where avoiding subscription commitments is preferred"],"notFor":["Users needing well-documented APIs with clear request/response schemas","High-volume consumers who would benefit from bulk pricing or subscriptions","Anyone requiring non-crypto payment methods"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:14.939Z"},"updatedAt":"2026-04-28T13:33:35.550Z"}}