{"id":"459ee4aa-6db7-412c-9807-d46268ee3016","shortId":"urwmuC","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 31) 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.\n\nThe specific endpoint `/api/v1/loans/31` is labeled \"Premium API Access\" in the x402 challenge. Its exact response payload is undocumented — the provider's landing page lists many other endpoints but does not enumerate a `/loans/` category, so the content returned by this particular resource is unclear. The x402 challenge confirms the endpoint is live, accepts POST requests, charges a maximum of 20,000 base units of USDC (i.e., $0.02 given USDC's 6 decimals) on Base, and returns `application/json`.\n\nThe provider advertises no API keys, no rate limits, and instant access. Documentation pages (`/docs`, `/pricing`, `/README`) all resolve but contain only a \"Connect wallet\" prompt with no substantive content, so there is no schema documentation, example requests, or example responses available for this or any other endpoint on the platform.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","loan-data","json-response","post-method"],"categories":["finance","data"],"synonyms":["loan API","loan data endpoint","x402 loan","USDC micropayment API","Base network API","pay-per-call API","lowpaymentfee"],"warnings":["The /api/v1/loans/31 endpoint is not listed among the provider's advertised API catalog — its purpose and response schema are unknown.","All documentation pages (/docs, /pricing, /README) contain only a 'Connect wallet' prompt with no actual content.","No request body schema or response schema is available; integration requires trial-and-error.","The endpoint's label 'Premium API Access' is generic and does not describe the actual data returned."],"endpointUrl":"https://lowpaymentfee.com/api/v1/loans/31","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/31","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, but there is zero documentation on what the /loans/31 resource actually returns. No request or response schemas, no examples, and the docs/pricing/README pages are all empty beyond a wallet-connect prompt. The endpoint itself is not listed on the provider's own landing page 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'/docs':175 '/loans':116 '/pricing':176 '/readme':177 '0.02':10,24,72,150 '000':144 '20':143 '31':42 '6':154 'Base network API' 'USDC micropayment API' 'accept':136 'access':34,91,172 'advertis':163 'ai/ml':62 'analyt':61 'api':58,90,165 'application/json':160 'avail':202 'base':8,22,81,145,157 'behind':43 'broad':51 'call':74 'catalog':52 'categori':117 'challeng':95,130 'charg':139 'confirm':131 'connect':184 'contain':181 'content':120,190 'data':5,19,60,65 'decim':155 'document':173,196 'endpoint':6,20,30,85,110,133,208 'enumer':114 'exact':97 'exampl':197,200 'finance/web3':64 'gate':3,17 'given':151 'i.e':149 'id':41 'infer':63 'infrastructur':67 'instant':171 'json-response' 'key':166 'label':88 'land':105 'limit':169 'list':107 'live':135 'loan':4,18,38,40 'loan API' 'loan data endpoint' 'loan-data' 'lowpaymentfee' 'lowpaymentfee.com':32 'mani':108 'maximum':141 'network':82 'oper':49 'page':106,174 'particular':124 'pay':9,23,55 'pay-per-call API' 'pay-per-request':54 'payload':99 'paywal':46 'per':11,25,56,73 'platform':211 'post':137 'post-method' 'premium':89 'price':70 'prompt':186 'provid':33,48,103,162 'rate':168 'request':12,26,57,138,198 'resolv':179 'resourc':39,125 'respons':98,201 'return':121,159 'schema':195 'settl':76 'span':59 'specif':37,84 'substant':189 'unclear':127 'undocu':101 'unit':146 'usdc':14,28,78,148,152 'usdc-base' 'util':68 'wallet':185 'x402':2,16,45,94,129 'x402 loan' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"6d399d4e-da55-49c0-8925-715bade5f318","listingId":"459ee4aa-6db7-412c-9807-d46268ee3016","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/31","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:47:36.191Z"}],"sources":[{"listingId":"459ee4aa-6db7-412c-9807-d46268ee3016","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/loans/31","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:47:36.191Z","lastSeenAt":"2026-04-28T13:33:35.318Z"}],"details":{"listingId":"459ee4aa-6db7-412c-9807-d46268ee3016","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/loans/31 \\\n  -H \"X-PAYMENT: <x402-payment-token>\" \\\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 x402 challenge returns maxAmountRequired of 20000 base units of USDC (USD Coin) on Base network","source_url":"https://lowpaymentfee.com/api/v1/loans/31"},{"claim":"The provider advertises $0.02 per request, no API keys, no rate limits, instant access, Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/loans/31"},{"claim":"Documentation pages resolve but contain only 'Connect wallet' with no substantive content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieving loan record details programmatically with per-request USDC payment","Integrating loan data into agent workflows without API key management","Accessing financial data via x402 protocol on Base"],"bestFor":["Agents or services that need on-demand loan data without subscription commitments","Developers experimenting with x402 payment protocol integrations","Low-volume consumers who prefer pay-per-call pricing"],"notFor":["Users who need detailed API documentation or response schemas before integrating","High-volume consumers who would benefit from bulk/subscription pricing"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:15.205Z"},"updatedAt":"2026-04-28T13:33:35.318Z"}}