{"id":"617fa2ab-67b5-40ea-b7ca-b5bc9605a81d","shortId":"SJZWf2","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 a specific loan resource (ID 79) 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 cost of 0.02 USDC per request (20,000 base units at 6 decimals).\n\nlowpaymentfee.com is a broader platform offering multiple pay-per-call API categories including data & analytics, AI & machine learning (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 priced at $0.02 per request with no API keys, no rate limits, and no minimum commitments required.\n\nThe specific endpoint `/api/v1/loans/79` is labeled \"Premium API Access\" but its exact response schema and the nature of the loan data it returns are not documented in the available crawl material. The probe confirms the endpoint is live, returning a proper 402 x402 challenge. However, there is no OpenAPI spec, no detailed documentation, and no example responses available, so the precise data returned remains unclear.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-call","loan-data","json-response","no-api-key"],"categories":["finance","data"],"synonyms":["loan API","x402 loan endpoint","pay-per-request API","USDC micropayment API","Base network API","lowpaymentfee","crypto payment API"],"warnings":["No OpenAPI or schema documentation available for this endpoint","The exact data returned by /api/v1/loans/79 is unknown — 'Premium API Access' is a generic label","Documentation, pricing, API, and README pages all render only 'Connect wallet' with no useful content","The endpoint targets a specific resource ID (79); it is unclear if other loan IDs are available or how to discover them"],"endpointUrl":"https://lowpaymentfee.com/api/v1/loans/79","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/79","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live and returns a valid x402 402 challenge, confirming it works. However, there is no OpenAPI spec, no documentation of request/response schemas, no example payloads, and the specific purpose of the /loans/79 resource is undocumented. The crawl pages beyond the homepage returned only 'Connect wallet' with no useful 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'/request':17,34 '0.02':16,33,77,134 '000':82 '0x8335':70 '20':81 '2913':71 '402':190 '6':86 '79':47 'Base network API' 'USDC micropayment API' 'accept':54 'access':40,157 'ai':104 'analysi':108 'analyt':103 'api':99,139,156 'avail':177,206 'base':9,26,65,83 'base-network' 'broader':91 'call':4,21,98 'categori':100 'challeng':192 'classif':110 'commit':147 'confirm':182 'contract':69 'convers':127 'cost':75 'crawl':178 'crypto payment API' 'data':6,23,102,169,210 'decim':87 'detail':200 'document':174,201 'embed':111 'endpoint':7,24,36,130,151,184 'estim':121 'exact':160 'exampl':204 'exchang':116 'feed':115 'financ':112 'gas':120 'generat':128 'geocod':125 'howev':193 'id':46 'includ':101 'infrastructur':123 'json':59 'json-response' 'key':140 'label':154 'learn':106 'limit':143 'live':186 'loan':5,22,44,168 'loan API' 'loan-data' 'lowpaymentfee' 'lowpaymentfee.com':38,88 'machin':105 'materi':179 'maximum':74 'minimum':146 'multipl':94 'natur':165 'network':66 'no-api-key' 'offer':93 'openapi':197 'pay':2,19,96 'pay-per-cal':1,18,95 'pay-per-call' 'pay-per-request API' 'payment':51,60 'per':3,20,79,97,135 'platform':92 'post':55 'precis':209 'premium':155 'price':114,132 'probe':181 'proper':189 'protocol':52 'provid':39 'quot':119 'rate':117,142 'remain':212 'request':56,80,136 'requir':148 'resourc':45 'respons':161,205 'return':58,171,187,211 'schema':162 'sentiment':107 'settl':12,29,62 'spec':198 'specif':43,150 'summar':109 'token':118 'unclear':213 'unit':84 'usdc':14,31,68,78 'usdc-settlement' 'use':67 'util':124 'valid':126 'via':10,27,48 'web3':113 'x402':11,28,50,191 'x402 loan endpoint' 'x402-payment'","prices":[{"id":"ba611963-e7c1-445a-9ee9-ad32004971eb","listingId":"617fa2ab-67b5-40ea-b7ca-b5bc9605a81d","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/79","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:47:59.063Z"}],"sources":[{"listingId":"617fa2ab-67b5-40ea-b7ca-b5bc9605a81d","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/loans/79","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:47:59.063Z","lastSeenAt":"2026-04-28T10:33:35.660Z"}],"details":{"listingId":"617fa2ab-67b5-40ea-b7ca-b5bc9605a81d","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/loans/79 \\\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 402 with x402 challenge requiring USDC payment on Base network","source_url":"https://lowpaymentfee.com/api/v1/loans/79"},{"claim":"Max amount required is 20000 base units of USDC (0.02 USDC)","source_url":"https://lowpaymentfee.com/api/v1/loans/79"},{"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 is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/loans/79"}],"useCases":["Retrieving loan data on-demand without API key registration","Agent-driven financial data access with per-call USDC micropayments","Integrating loan information into automated workflows via x402 protocol"],"bestFor":["Developers wanting keyless, pay-per-call access to loan data","AI agents that can settle x402 payments on Base in USDC","Users who prefer no-commitment, usage-based pricing"],"notFor":["Users needing bulk or batch loan data retrieval at scale (no documented batch endpoints)","Anyone without a Base-compatible USDC wallet","Users requiring detailed API documentation or guaranteed SLAs"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:14.097Z"},"updatedAt":"2026-04-28T10:33:35.660Z"}}