{"id":"751e4ef7-f6c9-40cf-84b4-b7b2d137ebd5","shortId":"exCbMS","kind":"x402","title":"x402-gated loan data endpoint on Base, pay-per-request with USDC.","tagline":"x402-gated loan data endpoint on Base, pay-per-request with USDC.","description":"This endpoint at `/api/v1/loans/15` is part of the lowpaymentfee.com platform, a collection of x402-protocol pay-per-request APIs spanning data analytics, AI/ML, finance, and infrastructure categories. The specific `/loans/15` path is not listed on the provider's landing page among the advertised API categories, so its exact functionality is unclear — the generic title \"Premium API Access\" and the JSON mime type suggest it returns structured data, possibly related to loan or financial information for a resource with ID 15.\n\nThe endpoint is live and responds with a valid x402 challenge on Base network. It accepts payment in USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`) with a maximum amount of 20,000 base units, which equals $0.02 (USDC uses 6 decimals). The payment scheme is \"exact\" with a 300-second timeout. The platform advertises a flat $0.02 per request across all endpoints, no API keys, no rate limits, and instant access.\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/15` endpoint actually returns. The endpoint accepts POST requests based on the outputSchema in the x402 challenge.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","json-response","post-method","loan-data"],"categories":["finance"],"synonyms":["loan API","financial data API","x402 loan endpoint","pay-per-call API","USDC micropayment API","lowpaymentfee"],"warnings":["The /api/v1/loans/15 path is not listed among the provider's advertised API endpoints — its purpose is unclear","All documentation pages (docs, API, pricing, README) render only 'Connect wallet' with no content","No OpenAPI schema, request format, or response examples are available","The endpoint's actual data output cannot be verified without making a paid request"],"endpointUrl":"https://lowpaymentfee.com/api/v1/loans/15","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/15","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live with a valid x402 challenge and clear pricing ($0.02 USDC on Base), but there is no documentation, no OpenAPI schema, no request/response examples, and the /loans/15 path is not listed among the provider's advertised endpoints. The actual functionality is 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'/loans/15':60,214 '0.02':143,163 '000':138 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':131 '15':110 '20':137 '300':155 '6':146 'USDC micropayment API' 'accept':126,220 'access':87,177 'across':166 'actual':216 'advertis':73,160 'ai/ml':53 'among':71 'amount':135 'analyt':52 'api':49,74,86,170,184 'base':8,22,123,139,223 'categori':57,75 'challeng':121,230 'collect':40 'connect':193 'content':199 'contract':130 'data':5,19,51,97 'decim':147 'descript':210 'doc':183 'document':178 'endpoint':6,20,30,112,168,215,219 'equal':142 'exact':78,152 'exampl':207 'extrem':180 'financ':54 'financi':103 'financial data API' 'flat':162 'function':79 'gate':3,17 'generic':83 'id':109 'inform':104 'infrastructur':56 'instant':176 'json':90 'json-response' 'key':171 'land':69 'limit':174 'list':64 'live':114 'loan':4,18,101 'loan API' 'loan-data' 'lowpaymentfee' 'lowpaymentfee.com':37 'maximum':134 'mime':91 'network':124 'openapi':203 'outputschema':226 'page':70,188 'part':34 'path':61 'pay':10,24,46 'pay-per-call API' 'pay-per-request':9,23,45 'payment':127,149 'per':11,25,47,164 'platform':38,159 'possibl':98 'post':221 'post-method' 'premium':85 'price':185 'prompt':195 'protocol':44 'provid':67 'rate':173 'readm':187 'relat':99 'render':190 'request':12,26,48,165,222 'request/response':206 'resourc':107 'respond':116 'return':95,217 'schema':204 'scheme':150 'second':156 'span':50 'spars':181 'specif':59 'structur':96 'substant':198 'suggest':93 'timeout':157 'titl':84 'type':92 'unclear':81 'unit':140 'usdc':14,28,129,144 'usdc-base' 'use':145 'valid':119 'wallet':194 'x402':2,16,43,120,229 'x402 loan endpoint' 'x402-gated':1,15 'x402-payment' 'x402-protocol':42","prices":[{"id":"2b361c18-40ad-4716-8958-1496ef9aa11a","listingId":"751e4ef7-f6c9-40cf-84b4-b7b2d137ebd5","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/15","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:47:26.451Z"}],"sources":[{"listingId":"751e4ef7-f6c9-40cf-84b4-b7b2d137ebd5","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/loans/15","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:47:26.451Z","lastSeenAt":"2026-04-29T11:05:20.105Z"}],"details":{"listingId":"751e4ef7-f6c9-40cf-84b4-b7b2d137ebd5","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/loans/15 \\\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 a 402 x402 challenge requesting 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/loans/15"},{"claim":"The platform advertises $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/loans/15"}],"useCases":["Retrieving loan or financial data for a specific resource (ID 15)","Programmatic access to premium financial information via micropayment","Agent-driven data retrieval with automatic USDC payment on Base"],"bestFor":["Developers needing pay-per-request financial data without API key management","AI agents with x402-compatible wallets on Base network","Low-commitment, no-subscription access to premium data"],"notFor":["Users needing detailed documentation or schema before integrating","Bulk data retrieval where per-request pricing becomes expensive","Anyone without a Base-network USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:15.666Z"},"updatedAt":"2026-04-29T11:05:20.105Z"}}