{"id":"b790e732-547a-495c-9cf6-462811c7aa69","shortId":"WcVsfe","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 `/api/v1/loans/12` is part of the lowpaymentfee.com platform, a collection of x402-protocol pay-per-call APIs spanning data analytics, AI/ML, finance, infrastructure, and more. The specific `/loans/12` resource is labeled \"Premium API Access\" and returns JSON via POST. It is gated behind an x402 payment challenge on the Base network, accepting USDC (contract 0x8335…2913) with a maximum cost of $0.02 per request (20,000 base units at 6 decimals). No API keys, rate limits, or subscriptions are required — callers simply attach an x402 payment header to each request.\n\nThe broader lowpaymentfee.com platform advertises a uniform $0.02/request pricing model across all endpoints, covering categories like metrics, reports, sentiment analysis, text summarization, embeddings, price feeds, exchange rates, geocoding, and more. Documentation pages exist at `/docs`, `/pricing`, and `/README`, but all currently render only a \"Connect wallet\" prompt with no substantive content. As a result, there is no published schema, example request/response, or detailed documentation for this specific loans endpoint. The exact data returned by `/api/v1/loans/12` (e.g., loan details, financial calculations) is not documented and must be inferred from the endpoint path alone.\n\nThe endpoint is live and responds with a well-formed x402 challenge (version 1, scheme \"exact\"). Settlement occurs on Base mainnet to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second payment timeout.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","json-response","post-method","loan-data"],"categories":["finance"],"synonyms":["loan API","loan data endpoint","x402 loan","pay-per-call finance API","lowpaymentfee loans","USDC micropayment API","Base network API"],"warnings":["No documentation available — /docs, /pricing, and /README all render only a 'Connect wallet' prompt with no substantive content.","The exact data returned by /api/v1/loans/12 is unknown; the endpoint path suggests loan data but nothing is documented.","The endpoint path references a specific resource ID (12), which may be a single fixed record rather than a parameterized query.","This endpoint does not appear in the site's own listed API catalog, raising questions about its intended use."],"endpointUrl":"https://lowpaymentfee.com/api/v1/loans/12","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/12","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 challenge with clear pricing, but there is no documentation, no request/response schema, and no description of what data the /loans/12 resource actually returns. All doc pages render only 'Connect wallet' with no 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'/docs':158 '/loans/12':60 '/pricing':159 '/readme':161 '/request':131 '0.02':94,130 '000':98 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':240 '0x8335':87 '1':230 '20':97 '2913':88 '300':243 '6':102 'Base network API' 'USDC micropayment API' 'accept':84 'access':66 'across':134 'address':239 'advertis':127 'ai/ml':53 'alon':215 'analysi':143 'analyt':52 'api':49,65,105 'attach':115 'base':8,22,82,99,236 'base-network' 'behind':75 'broader':124 'calcul':203 'call':48 'caller':113 'categori':138 'challeng':79,228 'collect':40 'connect':168 'content':174 'contract':86 'cost':92 'cover':137 'current':164 'data':5,19,51,195 'decim':103 'detail':186,201 'document':154,187,206 'e.g':199 'embed':146 'endpoint':6,20,30,136,192,213,217 'exact':194,232 'exampl':183 'exchang':149 'exist':156 'feed':148 'financ':54 'financi':202 'form':226 'gate':3,17,74 'geocod':151 'header':119 'infer':210 'infrastructur':55 'json':69 'json-response' 'key':106 'label':63 'like':139 'limit':108 'live':219 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'x402-protocol':42","prices":[{"id":"bf12c060-a1e0-41f6-ab77-58aa85edeacd","listingId":"b790e732-547a-495c-9cf6-462811c7aa69","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/12","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:47:28.268Z"}],"sources":[{"listingId":"b790e732-547a-495c-9cf6-462811c7aa69","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/loans/12","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:47:28.268Z","lastSeenAt":"2026-04-29T11:05:20.205Z"}],"details":{"listingId":"b790e732-547a-495c-9cf6-462811c7aa69","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/loans/12 \\\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":"The endpoint returns a 402 x402 challenge with maxAmountRequired 20000 in USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/loans/12"},{"claim":"USDC contract address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 (6 decimals), so 20000 base units = $0.02","source_url":"https://lowpaymentfee.com/api/v1/loans/12"},{"claim":"Platform advertises $0.02/request uniform pricing with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"Documentation pages at /docs, /pricing, /README render only 'Connect wallet' with no content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Fetching loan-related data on demand without API key management","Integrating pay-per-call financial data into agent workflows","Accessing premium loan information via crypto micropayments"],"bestFor":["Agents or apps that need on-demand loan data with no subscription","Developers building on Base who want frictionless USDC-settled API access","Prototyping financial data integrations without signup or rate limits"],"notFor":["Users who need detailed API documentation or response schemas before integrating","High-volume consumers who would prefer bulk or subscription pricing"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:15.547Z"},"updatedAt":"2026-04-29T11:05:20.205Z"}}