{"id":"950ed716-87fa-4c18-b855-8dc27c3fedde","shortId":"5YjeJE","kind":"x402","title":"Loan amortization schedule endpoint, pay-per-request via x402 on Base (USDC).","tagline":"Loan amortization schedule endpoint, pay-per-request via x402 on Base (USDC).","description":"This x402-enabled endpoint at lowpaymentfee.com returns a loan amortization schedule for a specific loan (loan ID 89 in the URL path). It accepts POST requests and responds with JSON. Payment is settled on the Base network using USDC (contract 0x8335…2913) at $0.02 per request via the x402 exact payment scheme.\n\nThe provider, lowpaymentfee.com, hosts a broad catalog of pay-per-call APIs spanning data analytics, AI/ML inference, finance, crypto, and utility services — all priced at $0.02 per request with no API keys, no rate limits, and no commitments. The specific endpoint cataloged here falls under the finance category and produces a loan repayment schedule. However, the crawled documentation pages are essentially empty (showing only a \"Connect wallet\" prompt), so there is no detailed schema documentation for request parameters or response format. The loan ID (89) is hard-coded in the URL path, which may indicate either a demo/sample resource or that callers are expected to vary the path segment for different loans.\n\nBecause no OpenAPI spec, request body schema, or example responses were found in the crawl, the exact fields accepted in the POST body and the structure of the returned schedule are unknown. Agents should expect a JSON response containing typical amortization data (payment periods, principal, interest, balance) but this is inferred, not confirmed.","tags":[],"capabilities":["loan-amortization-schedule","x402-payment","usdc-base-network","pay-per-request","json-api"],"categories":["finance"],"synonyms":["loan schedule","amortization calculator","loan repayment schedule","payment schedule API","loan calculator","mortgage schedule"],"warnings":["No OpenAPI or schema documentation available — request body and response structure are unknown.","Documentation pages (/docs, /api, /pricing, /README) all render only a 'Connect wallet' prompt with no useful content.","The loan ID 89 is hard-coded in the endpoint path; it is unclear how to request schedules for other loans.","The endpoint is listed as 'Premium API Access' with no further description from the provider."],"endpointUrl":"https://lowpaymentfee.com/api/v1/loans/89/schedule","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/89/schedule","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is no OpenAPI spec, no request/response schema, no documentation beyond a wallet-connect prompt, and the loan ID is hard-coded in the path with no explanation. Effectively a stub 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'0x8335':68 '2913':69 '89':45,165 'accept':51,212 'agent':226 'ai/ml':96 'amort':2,15,37,234 'amortization calculator' 'analyt':95 'api':92,111 'balanc':240 'base':12,25,63 'bodi':199,216 'broad':85 'call':91 'caller':183 'catalog':86,122 'categori':128 'code':169 'commit':118 'confirm':246 'connect':146 'contain':232 'contract':67 'crawl':137,208 'crypto':99 'data':94,235 'demo/sample':179 'detail':153 'differ':192 'document':138,155 'either':177 'empti':142 'enabl':30 'endpoint':4,17,31,121 'essenti':141 'exact':77,210 'exampl':202 'expect':185,228 'fall':124 'field':211 'financ':98,127 'format':161 'found':205 'hard':168 'hard-cod':167 'host':83 'howev':135 'id':44,164 'indic':176 'infer':97,244 'interest':239 'json':57,230 'json-api' 'key':112 'limit':115 'loan':1,14,36,42,43,132,163,193 'loan calculator' 'loan repayment schedule' 'loan schedule' 'loan-amortization-schedule' 'lowpaymentfee.com':33,82 'may':175 'mortgage schedule' 'network':64 'openapi':196 'page':139 'paramet':158 'path':49,173,189 'pay':6,19,89 'pay-per-cal':88 'pay-per-request':5,18 'payment':58,78,236 'payment schedule API' 'per':7,20,72,90,107 'period':237 'post':52,215 'price':104 'princip':238 'produc':130 'prompt':148 'provid':81 'rate':114 'repay':133 'request':8,21,53,73,108,157,198 'resourc':180 'respond':55 'respons':160,203,231 'return':34,222 'schedul':3,16,38,134,223 'schema':154,200 'scheme':79 'segment':190 'servic':102 'settl':60 'show':143 'span':93 'spec':197 'specif':41,120 'structur':219 'typic':233 'unknown':225 'url':48,172 'usdc':13,26,66 'usdc-base-network' 'use':65 'util':101 'vari':187 'via':9,22,74 'wallet':147 'x402':10,23,29,76 'x402-enabled':28 'x402-payment'","prices":[{"id":"5b8a52f1-76b9-4c34-ab17-85248e0ffafd","listingId":"950ed716-87fa-4c18-b855-8dc27c3fedde","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/89/schedule","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:48:05.157Z"}],"sources":[{"listingId":"950ed716-87fa-4c18-b855-8dc27c3fedde","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/loans/89/schedule","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:48:05.157Z","lastSeenAt":"2026-04-29T06:34:07.562Z"}],"details":{"listingId":"950ed716-87fa-4c18-b855-8dc27c3fedde","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/loans/89/schedule \\\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 HTTP 402 with an x402 challenge requiring USDC payment on Base network","source_url":"https://lowpaymentfee.com/api/v1/loans/89/schedule"},{"claim":"maxAmountRequired is 20000 base units of USDC (6 decimals) = $0.02 per request","source_url":"https://lowpaymentfee.com/api/v1/loans/89/schedule"},{"claim":"All APIs on the platform are priced at $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 network","source_url":"https://lowpaymentfee.com/api/v1/loans/89/schedule"}],"useCases":["Retrieve a loan amortization schedule showing principal and interest breakdowns per period","Integrate loan payment calculations into financial planning tools","Automate loan analysis for fintech applications"],"bestFor":["Agents needing on-demand loan schedule data without API key registration","Pay-per-use financial calculation without subscription commitments","Programmatic access to amortization tables settled via crypto micropayments"],"notFor":["Bulk batch processing of thousands of loan schedules (no documented batch endpoint)","Users who need detailed API documentation or OpenAPI specs before integrating"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:13.8Z"},"updatedAt":"2026-04-29T06:34:07.562Z"}}