{"id":"18b0252d-03b9-47da-bffd-737ebbaaf4af","shortId":"mVT6d7","kind":"x402","title":"Pay-per-call loan data API on Base via x402, settled in USDC at $0.02/request.","tagline":"Pay-per-call loan data API on Base via x402, settled in USDC at $0.02/request.","description":"This endpoint at lowpaymentfee.com provides access to a loans resource (specifically loan ID 60) via the x402 payment protocol. It accepts POST requests and returns JSON. Payment is settled on the Base network using USDC (contract 0x8335…2913) with a maximum amount of 20,000 base units, which equals $0.02 per request (USDC uses 6 decimals).\n\nThe provider's landing page advertises a broad catalog of pay-per-call APIs spanning data & analytics, AI/ML (sentiment analysis, summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation) — all priced at $0.02 per request. However, this specific endpoint (/api/v1/loans/60) is not listed among those categories on the homepage, and no documentation describes what the loans resource actually returns. The docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no substantive content.\n\nBecause there is no OpenAPI schema, no request/response examples, and no documentation explaining the loans endpoint's input parameters or output format, the actual functionality is unclear. The x402 challenge is live and well-formed, confirming the endpoint is operational and accepts payments. The pricing model is straightforward: no API keys, no rate limits, pay per request with USDC on Base.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","json-response","loans-data"],"categories":["finance","data"],"synonyms":["loan data API","x402 loans endpoint","pay-per-call API","USDC micropayment API","Base network API","lowpaymentfee","crypto payment API"],"warnings":["No documentation exists for the /api/v1/loans/60 endpoint — its purpose and response format are unknown","The loans endpoint is not listed among the provider's advertised API catalog on the homepage","All documentation pages (docs, API, pricing, README) render only a 'Connect wallet' prompt with no content","No OpenAPI schema or request/response examples available"],"endpointUrl":"https://lowpaymentfee.com/api/v1/loans/60","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/60","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The x402 challenge is live and well-formed, confirming the endpoint works and pricing is clear ($0.02 USDC on Base). However, there is zero documentation for the /api/v1/loans/60 endpoint — no schema, no examples, no description of what it returns. The docs pages are empty. The endpoint isn't even listed on the provider's own homepage 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'/request':17,34 '0.02':16,33,84,135 '000':79 '0x8335':71 '20':78 '2913':72 '6':89 '60':48 'Base network API' 'USDC micropayment API' 'accept':55,222 'access':40 'actual':160,203 'advertis':96 'ai/ml':109 'among':146 'amount':76 'analysi':111 'analyt':108 'api':7,24,105,164,230 'base':9,26,66,80,241 'base-network' 'broad':98 'call':4,21,104 'catalog':99 'categori':148 'challeng':209 'classif':113 'confirm':216 'connect':173 'content':179 'contract':70 'convers':130 'crypto payment API' 'data':6,23,107 'decim':90 'describ':155 'doc':163 'document':154,191 'embed':114 'endpoint':36,141,195,218 'equal':83 'estim':124 'exampl':188 'exchang':119 'explain':192 'feed':118 'financ':115 'form':215 'format':201 'function':204 'gas':123 'generat':131 'geocod':128 'homepag':151 'howev':138 'id':47 'infrastructur':126 'input':197 'json':60 'json-response' 'key':231 'land':94 'limit':234 'list':145 'live':211 'loan':5,22,43,46,158,194 'loan data API' 'loans-data' 'lowpaymentfee' 'lowpaymentfee.com':38 'maximum':75 'model':226 'network':67 'openapi':184 'oper':220 'output':200 'page':95,168 'paramet':198 'pay':2,19,102,235 'pay-per-cal':1,18,101 'pay-per-call API' 'pay-per-request' 'payment':52,61,223 'per':3,20,85,103,136,236 'post':56 'price':117,133,165,225 'prompt':175 'protocol':53 'provid':39,92 'quot':122 'rate':120,233 'readm':167 'render':170 'request':57,86,137,237 'request/response':187 'resourc':44,159 'return':59,161 'schema':185 'sentiment':110 'settl':12,29,63 'span':106 'specif':45,140 'straightforward':228 'substant':178 'summar':112 'token':121 'unclear':206 'unit':81 'usdc':14,31,69,87,239 'usdc-settlement' 'use':68,88 'util':127 'valid':129 'via':10,27,49 'wallet':174 'web3':116 'well':214 'well-form':213 'x402':11,28,51,208 'x402 loans endpoint' 'x402-payment'","prices":[{"id":"93bb364d-6bcf-497e-b39e-fe7f55f89aac","listingId":"18b0252d-03b9-47da-bffd-737ebbaaf4af","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/60","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:47:47.069Z"}],"sources":[{"listingId":"18b0252d-03b9-47da-bffd-737ebbaaf4af","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/loans/60","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:47:47.069Z","lastSeenAt":"2026-04-28T11:33:36.255Z"}],"details":{"listingId":"18b0252d-03b9-47da-bffd-737ebbaaf4af","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/loans/60 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-token>\"","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 in USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/loans/60"},{"claim":"All listed APIs are priced at $0.02 per request with no API keys, no rate limits","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/loans/60"}],"useCases":["Retrieving loan data for a specific loan ID via a single paid API call","Integrating pay-per-request financial data into agent workflows without API keys","Programmatic access to loan information settled via on-chain USDC micropayments"],"bestFor":["Agents or developers who want keyless, pay-per-call access to loan data","Users already on the Base network with USDC who need frictionless API access","Prototyping x402 payment flows with a low-cost endpoint"],"notFor":["Users needing detailed API documentation or guaranteed schema stability","Bulk data retrieval where per-request pricing would be cost-inefficient","Anyone requiring non-crypto payment methods"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:14.644Z"},"updatedAt":"2026-04-28T11:33:36.255Z"}}