{"id":"5b50c1d4-e75c-42ee-bbb5-26f233f6f1a1","shortId":"5btNa2","kind":"x402","title":"x402-payable loan data endpoint on Base, settled in USDC at $0.02 per request.","tagline":"x402-payable loan data endpoint on Base, settled in USDC at $0.02 per request.","description":"This endpoint at lowpaymentfee.com provides premium API access to a loan resource (ID 6) via the x402 payment protocol. It accepts POST requests and returns JSON. Payment is settled on the Base network using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) with a maximum amount of 20,000 base units, which equals $0.02 USD (USDC uses 6 decimals). No API keys or rate limits are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof.\n\nThe provider (lowpaymentfee.com) hosts a broad catalog of x402-payable endpoints spanning data & analytics, AI/ML inference, finance/Web3, and infrastructure utilities, all priced at $0.02 per request. This specific endpoint (/api/v1/loans/6) appears to be a loan-related data resource, though the exact response schema and fields are not documented in the available crawl material. The site's docs, pricing, and API pages all require a wallet connection and provide no additional detail beyond the landing page listing.\n\nBecause there is no OpenAPI spec, no response schema, and no documentation beyond the landing page, the exact data returned by this endpoint is unknown. Callers should expect a JSON response but will need to make a paid request to discover the structure. The x402 challenge is live and well-formed, confirming the endpoint is operational.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","json-response","post-method","no-api-key","per-request-pricing","loan-data"],"categories":["finance","data"],"synonyms":["loan API","x402 loan endpoint","USDC micropayment API","Base network API","pay-per-call loan data","lowpaymentfee API","402 payment API"],"warnings":["No OpenAPI or response schema available — the exact data returned is unknown","Documentation pages (docs, pricing, API, README) all render only a 'Connect wallet' prompt with no useful content","The specific resource '/api/v1/loans/6' is not listed on the provider's landing page catalog, raising questions about what it returns","No examples of request body or response body are available"],"endpointUrl":"https://lowpaymentfee.com/api/v1/loans/6","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/6","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The x402 challenge is live and well-formed, confirming the endpoint works. However, there is no OpenAPI spec, no response schema, no documentation, and no example responses. The endpoint's purpose ('loans/6') is vague and undocumented. Effectively a stub 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'0.02':13,28,79,131 '000':74 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':67 '20':73 '402 payment API' '6':44,83 'Base network API' 'USDC micropayment API' 'accept':51 'access':38 'addit':178 'ai/ml':122 'amount':71 'analyt':121 'api':37,86,168 'appear':138 'attach':95 'avail':159 'base':8,23,62,75 'base-network' 'beyond':180,197 'broad':112 'caller':93,210 'catalog':113 'challeng':230 'confirm':237 'connect':174 'contract':66 'crawl':160 'data':5,20,120,145,203 'decim':84 'detail':179 'discov':225 'doc':165 'document':156,196 'endpoint':6,21,32,118,136,207,239 'equal':78 'exact':149,202 'expect':212 'field':153 'finance/web3':124 'form':236 'header':100 'host':110 'id':43 'infer':123 'infrastructur':126 'json':56,214 'json-response' 'key':87 'land':182,199 'limit':90 'list':184 'live':232 'loan':4,19,41,143 'loan API' 'loan-data' 'loan-rel':142 'lowpaymentfee API' 'lowpaymentfee.com':34,109 'make':220 'materi':161 'maximum':70 'need':218 'network':63 'no-api-key' 'openapi':189 'oper':241 'page':169,183,200 'paid':222 'pay-per-call loan data' 'payabl':3,18,117 'payment':48,57,99,105 'per':14,29,132 'per-request-pricing' 'post':52 'post-method' 'premium':36 'price':129,166 'proof':106 'protocol':49 'provid':35,108,176 'rate':89 'relat':144 'request':15,30,53,133,223 'requir':92,171 'resourc':42,146 'respons':150,192,215 'return':55,204 'schema':151,193 'settl':9,24,59 'simpli':94 'site':163 'span':119 'spec':190 'specif':135 'structur':227 'though':147 'unit':76 'unknown':209 'usd':80 'usdc':11,26,65,81 'usdc-settlement' 'use':64,82 'util':127 'valid':103 'via':45 'wallet':173 'well':235 'well-form':234 'x':98 'x-payment':97 'x402':2,17,47,104,116,229 'x402 loan endpoint' 'x402-payable':1,16,115 'x402-payment'","prices":[{"id":"1cc5c584-f8c9-4a99-a11a-6c96f97d3e58","listingId":"5b50c1d4-e75c-42ee-bbb5-26f233f6f1a1","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/6","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:47:48.869Z"}],"sources":[{"listingId":"5b50c1d4-e75c-42ee-bbb5-26f233f6f1a1","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/loans/6","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:47:48.869Z","lastSeenAt":"2026-04-28T11:33:36.279Z"}],"details":{"listingId":"5b50c1d4-e75c-42ee-bbb5-26f233f6f1a1","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/loans/6 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-proof>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units in USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/loans/6"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/loans/6"},{"claim":"All endpoints on the site are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"}],"useCases":["Fetching loan data on-demand with per-request USDC micropayments","Integrating pay-per-call financial data into agent workflows without API key management","Programmatic access to loan information settled on Base L2"],"bestFor":["Agents or apps that need loan data without subscription commitments","Developers experimenting with x402 payment protocol integrations","Crypto-native workflows that can pay in USDC on Base"],"notFor":["Users who need detailed documentation or response schemas before calling","High-volume consumers who would benefit from bulk pricing or subscriptions","Anyone without a Base-compatible wallet or USDC balance"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:14.615Z"},"updatedAt":"2026-04-28T11:33:36.279Z"}}