{"id":"d5661d21-6f93-4289-bdf7-c29c8070fc8a","shortId":"tV5Qx8","kind":"x402","title":"x402-gated loan data endpoint on Base, pay $0.02 per request in USDC.","tagline":"x402-gated loan data endpoint on Base, pay $0.02 per request in USDC.","description":"This endpoint at lowpaymentfee.com provides access to a loan resource (ID 98) via the x402 payment protocol. It is part of a broader platform offering pay-per-request APIs across data analytics, AI/ML, finance, and infrastructure categories, all gated behind x402 micropayments on the Base network using USDC.\n\nThe specific endpoint `/api/v1/loans/98` returns JSON data when a valid x402 payment header is supplied. The x402 challenge confirms the endpoint is live, accepting POST requests, and requires a maximum of 20,000 base units of USDC (0.02 USD, since USDC uses 6 decimals) per call. Payment is settled on-chain to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` using the USDC contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913` on Base.\n\nThe platform advertises no API keys, no rate limits, and instant access. However, documentation 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 description of what the loan data actually contains, and no example requests or responses. The endpoint path suggests it returns data about a specific loan (ID 98), but the actual response schema and fields are unknown.","tags":[],"capabilities":["x402-payment","usdc-micropayment","base-network","loan-data","pay-per-request","no-api-key","json-response"],"categories":["finance","data"],"synonyms":["loan API","loan data endpoint","x402 loan","micropayment API","USDC pay-per-call","Base network API","lowpaymentfee"],"warnings":["No documentation available — all doc pages render only 'Connect wallet' with no content","No OpenAPI or response schema provided; actual response format is unknown","The endpoint path '/api/v1/loans/98' suggests a single hardcoded resource; unclear if other loan IDs are available","No information about what 'loan' data is returned or its source/accuracy"],"endpointUrl":"https://lowpaymentfee.com/api/v1/loans/98","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/98","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 pricing is clear ($0.02 USDC on Base), but there is no documentation, no OpenAPI schema, no example responses, and no description of what the loan data actually contains. The docs/pricing/README pages are all empty wallet-connect stubs. This is effectively a stub 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'0.02':10,24,115 '000':110 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':132 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':137 '20':109 '6':120 '98':40,207 'Base network API' 'USDC pay-per-call' 'accept':101 'access':34,151 'across':59 'actual':187,210 'address':131 'advertis':142 'ai/ml':62 'analyt':61 'api':58,144,159 'base':8,22,74,111,139 'base-network' 'behind':69 'broader':51 'call':123 'categori':66 'chain':129 'challeng':95 'confirm':96 'connect':168 'contain':188 'content':174 'contract':136 'data':5,19,60,84,186,201 'decim':121 'descript':181 'doc':158 'document':153 'endpoint':6,20,30,80,98,196 'exampl':191 'extrem':155 'field':214 'financ':63 'gate':3,17,68 'header':90 'howev':152 'id':39,206 'infrastructur':65 'instant':150 'json':83 'json-response' 'key':145 'limit':148 'live':100 'loan':4,18,37,185,205 'loan API' 'loan data endpoint' 'loan-data' 'lowpaymentfee' 'lowpaymentfee.com':32 'maximum':107 'micropay':71 'micropayment API' 'network':75 'no-api-key' 'offer':53 'on-chain':127 'openapi':178 'page':163 'part':48 'path':197 'pay':9,23,55 'pay-per-request':54 'payment':44,89,124 'per':11,25,56,122 'platform':52,141 'post':102 'price':160 'prompt':170 'protocol':45 'provid':33 'rate':147 'readm':162 'render':165 'request':12,26,57,103,192 'requir':105 'resourc':38 'respons':194,211 'return':82,200 'schema':179,212 'settl':126 'sinc':117 'spars':156 'specif':79,204 'substant':173 'suggest':198 'suppli':92 'unit':112 'unknown':216 'usd':116 'usdc':14,28,77,114,118,135 'usdc-micropayment' 'use':76,119,133 'valid':87 'via':41 'wallet':169 'x402':2,16,43,70,88,94 'x402 loan' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"380e730b-3aca-44a7-87b9-3dbd30bdaf62","listingId":"d5661d21-6f93-4289-bdf7-c29c8070fc8a","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/98","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:48:08.163Z"}],"sources":[{"listingId":"d5661d21-6f93-4289-bdf7-c29c8070fc8a","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/loans/98","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:48:08.163Z","lastSeenAt":"2026-04-28T09:06:06.194Z"}],"details":{"listingId":"d5661d21-6f93-4289-bdf7-c29c8070fc8a","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/loans/98 \\\n  -H \"X-PAYMENT: <x402-payment-token>\" \\\n  -H \"Content-Type: application/json\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns HTTP 402 with an x402 challenge requiring 20,000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/loans/98"},{"claim":"Platform pricing is $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/98"},{"claim":"Payment recipient address is 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","source_url":"https://lowpaymentfee.com/api/v1/loans/98"}],"useCases":["Retrieving loan details or financial data for a specific loan ID","Integrating pay-per-request loan data into agent workflows","Accessing financial data without API key registration"],"bestFor":["Agents needing on-demand loan data with crypto micropayments","Developers prototyping x402 payment flows","Use cases requiring keyless, pay-as-you-go API access"],"notFor":["Users needing detailed documentation or guaranteed response schemas","Bulk data retrieval where per-request pricing is inefficient","Production systems requiring SLA guarantees or support"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:13.583Z"},"updatedAt":"2026-04-28T09:06:06.194Z"}}