{"id":"86bd04de-d242-44f6-8a17-030823776cb7","shortId":"ZFmbkJ","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 lowpaymentfee.com provides access to loan data (resource ID 5) 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 an exact-scheme challenge requiring up to 20,000 base units (0.02 USDC, i.e. two cents) per call.\n\nThe broader lowpaymentfee.com platform advertises a wide catalog of pay-per-call APIs spanning data & analytics, AI/ML inference (sentiment analysis, summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are listed at $0.02 per request with no API keys, no rate limits, and no minimum commitments.\n\nThis specific endpoint (/api/v1/loans/5) is labeled \"Premium API Access\" in the x402 challenge but is not individually documented on the site's landing page, which focuses on the broader catalog. No OpenAPI schema, request/response examples, or detailed documentation were found during the crawl — the docs, API, pricing, and README pages all rendered only a \"Connect wallet\" prompt with no substantive content. As a result, the exact request body format and response structure for this loans endpoint are unknown.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-call","loan-data","json-response","no-api-key"],"categories":["finance","data"],"synonyms":["loan API","loan data endpoint","x402 loan","USDC micropayment API","pay-per-request API","Base network API","lowpaymentfee"],"warnings":["No OpenAPI or schema documentation available for this endpoint","The /api/v1/loans/5 path is not listed on the provider's landing page catalog — its exact purpose and data model are undocumented","All docs/pricing/README pages returned only a 'Connect wallet' prompt with no substantive content","Request body format and response structure are completely unknown"],"endpointUrl":"https://lowpaymentfee.com/api/v1/loans/5","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/5","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 402 challenge, confirming it exists and accepts payments. However, there is no OpenAPI schema, no request/response examples, and no meaningful documentation — the docs pages render only a wallet-connect prompt. The specific /api/v1/loans/5 path is not listed on the landing page catalog, making its purpose unclear beyond the generic 'Premium API Access' 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'/request':17,34 '0.02':16,33,84,137 '000':81 '0x8335':69 '20':80 '2913':70 '5':46 'Base network API' 'USDC micropayment API' 'accept':53 'access':40,159 'advertis':95 'ai/ml':108 'analysi':111 'analyt':107 'api':104,142,158,196 'base':9,26,64,82 'base-network' 'bodi':218 'broader':92,179 'call':4,21,90,103 'catalog':98,180 'cent':88 'challeng':76,163 'classif':113 'commit':150 'connect':205 'content':211 'contract':68 'convers':130 'crawl':193 'data':6,23,43,106 'detail':187 'doc':195 'document':168,188 'embed':114 'endpoint':7,24,36,133,153,226 'estim':124 'exact':74,216 'exact-schem':73 'exampl':185 'exchang':119 'feed':118 'financ':115 'focus':176 'format':219 'found':190 'gas':123 'generat':131 'geocod':128 'i.e':86 'id':45 'individu':167 'infer':109 'infrastructur':126 'json':58 'json-response' 'key':143 'label':156 'land':173 'limit':146 'list':135 'loan':5,22,42,225 'loan API' 'loan data endpoint' 'loan-data' 'lowpaymentfee' 'lowpaymentfee.com':38,93 'minimum':149 'network':65 'no-api-key' 'openapi':182 'page':174,200 'pay':2,19,101 'pay-per-cal':1,18,100 'pay-per-call' 'pay-per-request API' 'payment':50,59 'per':3,20,89,102,138 'platform':94 'post':54 'premium':157 'price':117,197 'prompt':207 'protocol':51 'provid':39 'quot':122 'rate':120,145 'readm':199 'render':202 'request':55,139,217 'request/response':184 'requir':77 'resourc':44 'respons':221 'result':214 'return':57 'schema':183 'scheme':75 'sentiment':110 'settl':12,29,61 'site':171 'span':105 'specif':152 'structur':222 'substant':210 'summar':112 'token':121 'two':87 'unit':83 'unknown':228 'usdc':14,31,67,85 'usdc-settlement' 'use':66 'util':127 'valid':129 'via':10,27,47 'wallet':206 'web3':116 'wide':97 'x402':11,28,49,162 'x402 loan' 'x402-payment'","prices":[{"id":"9acc7c65-754d-45dd-899f-e869cbfdadc6","listingId":"86bd04de-d242-44f6-8a17-030823776cb7","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/5","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:47:32.556Z"}],"sources":[{"listingId":"86bd04de-d242-44f6-8a17-030823776cb7","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/loans/5","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:47:32.556Z","lastSeenAt":"2026-04-28T13:33:35.166Z"}],"details":{"listingId":"86bd04de-d242-44f6-8a17-030823776cb7","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/loans/5 \\\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 requires up to 20,000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/loans/5"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/loans/5"},{"claim":"All listed 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 advertises categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure","source_url":"https://lowpaymentfee.com"}],"useCases":["Retrieving loan record data on a per-call payment basis","Integrating loan information into agent workflows without API key management","Programmatic access to financial loan data settled via crypto micropayments"],"bestFor":["Agents or apps that need on-demand loan data without subscription commitments","Developers wanting keyless, pay-as-you-go API access on Base","Crypto-native workflows that can settle USDC payments natively"],"notFor":["Users who need detailed API documentation or guaranteed SLAs before integrating","High-volume batch processing where per-call pricing may add up","Non-crypto workflows that cannot handle x402 payment negotiation"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:15.405Z"},"updatedAt":"2026-04-28T13:33:35.166Z"}}