{"id":"5cd8b463-6d1b-4339-b8ee-583443572c75","shortId":"dQ2WxQ","kind":"x402","title":"x402-gated loan data endpoint on Base, pay-per-request with USDC.","tagline":"x402-gated loan data endpoint on Base, pay-per-request with USDC.","description":"This endpoint at lowpaymentfee.com provides access to a loan resource (ID 10) via the x402 payment protocol. The endpoint is live and returns a 402 challenge requiring payment in USDC on the Base network. The specific resource path `/api/v1/loans/10` suggests it returns data about a particular loan, though the exact response schema is not documented.\n\nThe provider lowpaymentfee.com hosts a broad catalog of x402-gated APIs spanning data & analytics, AI/ML inference, finance/Web3, and infrastructure utilities. Most listed endpoints are priced at $0.02 per request. However, the probed loan endpoint advertises a maxAmountRequired of 20,000 base units of USDC (6 decimals), which equals $0.02 — consistent with the site's uniform pricing. Payment is made via the x402 \"exact\" scheme to a specified wallet address on Base, with a 300-second timeout.\n\nDocumentation 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 spec, no request/response schema beyond the x402 challenge's outputSchema stub, and no description of what the `/api/v1/loans/10` endpoint actually returns. The loan endpoint itself is not listed on the homepage's catalog of available APIs, making it unclear whether it is a production resource or a test/demo endpoint.","tags":[],"capabilities":["x402-payment","usdc-payment","base-network","loan-data","pay-per-request","no-api-key"],"categories":["finance"],"synonyms":["loan API","loan data","x402 loan","USDC micropayment API","pay-per-call loan endpoint","Base network API","crypto payment API"],"warnings":["No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet'","No OpenAPI or response schema provided; unknown what data the endpoint returns","The /api/v1/loans/10 path is not listed in the provider's homepage catalog of available APIs","Loan-specific endpoints may involve regulated financial data — verify compliance requirements"],"endpointUrl":"https://lowpaymentfee.com/api/v1/loans/10","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/10","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is live and returns a valid x402 challenge, but there is no documentation, no OpenAPI spec, no response schema, and the loan endpoint is not even listed in the provider's own catalog. Effectively a stub with unknown 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'0.02':111,133 '000':124 '10':40 '20':123 '300':158 '402':53 '6':129 'Base network API' 'USDC micropayment API' 'access':34 'actual':206 'address':153 'advertis':119 'ai/ml':99 'analyt':98 'api':95,167,222 'avail':221 'base':8,22,61,125,155 'base-network' 'beyond':191 'broad':89 'catalog':90,219 'challeng':54,194 'connect':176 'consist':134 'content':182 'crypto payment API' 'data':5,19,71,97 'decim':130 'descript':200 'doc':166 'document':83,161 'endpoint':6,20,30,47,107,118,205,210,235 'equal':132 'exact':78,147 'extrem':163 'finance/web3':101 'gate':3,17,94 'homepag':217 'host':87 'howev':114 'id':39 'infer':100 'infrastructur':103 'list':106,214 'live':49 'loan':4,18,37,75,117,209 'loan API' 'loan data' 'loan-data' 'lowpaymentfee.com':32,86 'made':143 'make':223 'maxamountrequir':121 'network':62 'no-api-key' 'openapi':186 'outputschema':196 'page':171 'particular':74 'path':66 'pay':10,24 'pay-per-call loan endpoint' 'pay-per-request':9,23 'payment':44,56,141 'per':11,25,112 'price':109,140,168 'probe':116 'product':230 'prompt':178 'protocol':45 'provid':33,85 'readm':170 'render':173 'request':12,26,113 'request/response':189 'requir':55 'resourc':38,65,231 'respons':79 'return':51,70,207 'schema':80,190 'scheme':148 'second':159 'site':137 'span':96 'spars':164 'spec':187 'specif':64 'specifi':151 'stub':197 'substant':181 'suggest':68 'test/demo':234 'though':76 'timeout':160 'unclear':225 'uniform':139 'unit':126 'usdc':14,28,58,128 'usdc-payment' 'util':104 'via':41,144 'wallet':152,177 'whether':226 'x402':2,16,43,93,146,193 'x402 loan' 'x402-gated':1,15,92 'x402-payment'","prices":[{"id":"d360e6cb-3f56-4108-8d9f-96ea4b01f220","listingId":"5cd8b463-6d1b-4339-b8ee-583443572c75","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/10","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:47:25.237Z"}],"sources":[{"listingId":"5cd8b463-6d1b-4339-b8ee-583443572c75","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/loans/10","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:47:25.237Z","lastSeenAt":"2026-04-29T11:05:20.067Z"}],"details":{"listingId":"5cd8b463-6d1b-4339-b8ee-583443572c75","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/loans/10 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\"","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 of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/loans/10"},{"claim":"The site advertises $0.02 per request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/loans/10"},{"claim":"Docs, API, pricing, and README pages render only 'Connect wallet' with no substantive content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieving loan data on-demand with per-request USDC micropayments","Integrating loan information into agent workflows without API key management","Programmatic access to financial loan records via x402 protocol"],"bestFor":["Developers experimenting with x402 payment protocol","Agents needing keyless, pay-per-call access to loan data","Web3-native applications on Base network"],"notFor":["Production use cases requiring documented response schemas and SLAs","Bulk loan data retrieval at scale (per-request payment model)","Users without USDC on Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:15.723Z"},"updatedAt":"2026-04-29T11:05:20.067Z"}}