{"id":"eb7a8ae0-53db-485b-823f-64c0a9b36e10","shortId":"K9XAyR","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 54) via the x402 payment protocol. It is part of a broader platform offering pay-per-request APIs across data analytics, AI/ML, finance, and infrastructure categories, all gated behind x402 micropayments settled in USDC on the Base network.\n\nThe endpoint accepts POST requests and returns JSON. Payment is handled via the x402 exact scheme: callers attach an X-PAYMENT header with a signed USDC payment on Base. The max amount required is 20,000 base units of USDC (6 decimals), which equals $0.02 per request. The platform advertises no API keys, no rate limits, and instant access — you simply pay per call.\n\nThe specific resource at `/api/v1/loans/54` is labeled \"Premium API Access\" but no further documentation describes the loan data schema or what fields are returned. The docs, pricing, and API pages on the site all render only a \"Connect wallet\" prompt with no additional technical content. Without an OpenAPI spec, response examples, or detailed documentation, the exact shape of the response and the nature of the loan data remain unknown.","tags":[],"capabilities":["x402-payment","usdc-micropayment","base-network","loan-data","pay-per-request","json-response","post-method"],"categories":["finance","data"],"synonyms":["loan API","x402 loan endpoint","micropayment API","USDC pay-per-call","Base network API","lowpaymentfee","loan data service","402 payment API"],"warnings":["No OpenAPI or schema documentation available — response format is unknown","All documentation pages (docs, pricing, API, README) render only 'Connect wallet' with no technical content","The specific meaning of 'loans/54' and what data it returns is undocumented","The endpoint is labeled 'Premium API Access' which is generic and uninformative"],"endpointUrl":"https://lowpaymentfee.com/api/v1/loans/54","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/54","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is no OpenAPI spec, no response schema, no documentation beyond a wallet-connect prompt, and the nature of the 'loan' data is entirely undocumented. This is effectively a stub 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'0.02':10,24,126 '000':117 '20':116 '402 payment API' '54':42 '6':122 'Base network API' 'USDC pay-per-call' 'accept':83 'access':34,140,155 'across':61 'addit':188 'advertis':131 'ai/ml':64 'amount':113 'analyt':63 'api':60,133,154,174 'attach':98 'base':8,22,79,110,118 'base-network' 'behind':71 'broader':53 'call':145 'caller':97 'categori':68 'connect':183 'content':190 'data':5,19,62,163,212 'decim':123 'describ':160 'detail':198 'doc':171 'document':159,199 'endpoint':6,20,30,82 'equal':125 'exact':95,201 'exampl':196 'field':167 'financ':65 'gate':3,17,70 'handl':91 'header':103 'id':41 'infrastructur':67 'instant':139 'json':88 'json-response' 'key':134 'label':152 'limit':137 'loan':4,18,38,40,162,211 'loan API' 'loan data service' 'loan-data' 'lowpaymentfee' 'lowpaymentfee.com':32 'max':112 'micropay':73 'micropayment API' 'natur':208 'network':80 'offer':55 'openapi':193 'page':175 'part':50 'pay':9,23,57,143 'pay-per-request':56 'payment':46,89,102,108 'per':11,25,58,127,144 'platform':54,130 'post':84 'post-method' 'premium':153 'price':172 'prompt':185 'protocol':47 'provid':33 'rate':136 'remain':213 'render':180 'request':12,26,59,85,128 'requir':114 'resourc':39,148 'respons':195,205 'return':87,169 'schema':164 'scheme':96 'settl':74 'shape':202 'sign':106 'simpli':142 'site':178 'spec':194 'specif':37,147 'technic':189 'unit':119 'unknown':214 'usdc':14,28,76,107,121 'usdc-micropayment' 'via':43,92 'wallet':184 'without':191 'x':101 'x-payment':100 'x402':2,16,45,72,94 'x402 loan endpoint' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"f8f59cde-6cb5-4a5a-8ded-62a0868ff571","listingId":"eb7a8ae0-53db-485b-823f-64c0a9b36e10","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/54","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:47:51.280Z"}],"sources":[{"listingId":"eb7a8ae0-53db-485b-823f-64c0a9b36e10","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/loans/54","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:47:51.280Z","lastSeenAt":"2026-04-28T11:33:36.398Z"}],"details":{"listingId":"eb7a8ae0-53db-485b-823f-64c0a9b36e10","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/loans/54 \\\n  -H \"X-PAYMENT: <x402-signed-payment-header>\" \\\n  -H \"Content-Type: application/json\"","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 x402Version 1, exact scheme, on the Base network, requiring up to 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913)","source_url":"https://lowpaymentfee.com/api/v1/loans/54"},{"claim":"The platform advertises $0.02 per request, no API keys, no rate limits, instant access, Base network","source_url":"https://lowpaymentfee.com"},{"claim":"Docs, pricing, API, and README pages show only 'Connect wallet' with no additional content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieving loan data for loan ID 54 via a single micropayment","Integrating pay-per-request loan information into automated financial workflows","Agent-driven access to loan records without API key management"],"bestFor":["Developers wanting keyless, pay-per-call access to loan data","AI agents that can settle x402 payments on Base","Prototyping financial data integrations with minimal setup"],"notFor":["Bulk loan data retrieval (no documented batch endpoints)","Users who need detailed API documentation or response schemas before integrating","Non-crypto users who cannot settle USDC payments on Base"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:14.48Z"},"updatedAt":"2026-04-28T11:33:36.398Z"}}