{"id":"60e3154a-baf9-4f39-907d-63ce0163714e","shortId":"gEPLMJ","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 58) via the x402 payment protocol. It accepts HTTP 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 request.\n\nThe broader lowpaymentfee.com platform advertises a suite 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. However, this specific listing covers only the /api/v1/loans/58 resource.\n\nDocumentation is extremely sparse — the docs, pricing, and README pages all render only a \"Connect wallet\" prompt with no further technical detail. There is no OpenAPI spec, no request/response schema, and no example payloads available from the crawled material. The endpoint is confirmed live (returns a valid 402 x402 challenge), but the actual data returned after payment is unknown. The description \"Premium API Access\" is the provider's own label and does not clarify what loan data is served.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-call","loan-data","json-response","http-post"],"categories":["finance","data"],"synonyms":["loan API","loan data endpoint","x402 loan","micropayment API","USDC pay-per-call","Base network API","lowpaymentfee"],"warnings":["No API documentation available — docs, pricing, and README pages all show only 'Connect wallet'","No OpenAPI or JSON schema for request or response bodies","The specific data returned by /api/v1/loans/58 is unknown; 'Premium API Access' is not descriptive","The endpoint path suggests a single fixed resource (loan ID 58); unclear if other loan IDs are available","No examples or sample responses available from any crawled page"],"endpointUrl":"https://lowpaymentfee.com/api/v1/loans/58","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/58","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 accepts payments. However, there is no OpenAPI spec, no request/response schema, no documentation beyond a wallet-connect prompt, and no examples. The purpose of /api/v1/loans/58 is unclear beyond the generic label \"Premium API Access.\" This is effectively a stub 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'/request':17,34 '0.02':16,33,85,137 '000':82 '0x8335':70 '20':81 '2913':71 '402':207 '58':46 'Base network API' 'USDC pay-per-call' 'accept':53 'access':40,223 'actual':212 'advertis':96 'ai/ml':108 'analysi':111 'analyt':107 'api':104,142,222 'avail':194 'base':9,26,65,83 'base-network' 'broader':93 'call':4,21,103 'cent':89 'challeng':77,209 'clarifi':233 'classif':113 'commit':150 'confirm':202 'connect':174 'contract':69 'convers':130 'cover':155 'crawl':197 'data':6,23,43,106,213,236 'descript':220 'detail':181 'doc':165 'document':160 'embed':114 'endpoint':7,24,36,133,200 'estim':124 'exact':75 'exact-schem':74 'exampl':192 'exchang':119 'extrem':162 'feed':118 'financ':115 'gas':123 'generat':131 'geocod':128 'howev':151 'http':54 'http-post' 'i.e':87 'id':45 'infer':109 'infrastructur':126 'json':59 'json-response' 'key':143 'label':229 'limit':146 'list':135,154 'live':203 'loan':5,22,42,235 'loan API' 'loan data endpoint' 'loan-data' 'lowpaymentfee' 'lowpaymentfee.com':38,94 'materi':198 'micropayment API' 'minimum':149 'network':66 'openapi':185 'page':169 'pay':2,19,101 'pay-per-cal':1,18,100 'pay-per-call' 'payload':193 'payment':50,60,216 'per':3,20,90,102,138 'platform':95 'post':55 'premium':221 'price':117,166 'prompt':176 'protocol':51 'provid':39,226 'quot':122 'rate':120,145 'readm':168 'render':171 'request':56,91,139 'request/response':188 'requir':78 'resourc':44,159 'return':58,204,214 'schema':189 'scheme':76 'sentiment':110 'serv':238 'settl':12,29,62 'span':105 'spars':163 'spec':186 'specif':153 'suit':98 'summar':112 'technic':180 'token':121 'two':88 'unit':84 'unknown':218 'usdc':14,31,68,86 'usdc-settlement' 'use':67 'util':127 'valid':129,206 'via':10,27,47 'wallet':175 'web3':116 'x402':11,28,49,208 'x402 loan' 'x402-payment'","prices":[{"id":"b980512d-cfd4-4bca-b91c-fbb8c886f232","listingId":"60e3154a-baf9-4f39-907d-63ce0163714e","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/58","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:47:51.904Z"}],"sources":[{"listingId":"60e3154a-baf9-4f39-907d-63ce0163714e","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/loans/58","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:47:51.904Z","lastSeenAt":"2026-04-28T11:33:36.443Z"}],"details":{"listingId":"60e3154a-baf9-4f39-907d-63ce0163714e","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/loans/58 \\\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":"Endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units in USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/loans/58"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/loans/58"},{"claim":"Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"Docs, pricing, and README pages render only a 'Connect wallet' prompt","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieving loan data for a specific loan record (ID 58) on demand","Integrating pay-per-call loan information into automated financial workflows","Agent-driven data retrieval where no API key provisioning is desired"],"bestFor":["Developers or agents needing on-demand loan data without subscription commitments","x402-compatible agents that can settle USDC payments on Base","Prototyping pay-per-call financial data integrations"],"notFor":["Users who need detailed API documentation or response schemas before integrating","Bulk or high-volume loan data retrieval where per-call pricing is inefficient","Anyone without a Base-network USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:14.413Z"},"updatedAt":"2026-04-28T11:33:36.443Z"}}