{"id":"aa290331-b1de-4685-9cb4-ebaeaf51deab","shortId":"RnTHXB","kind":"x402","title":"Loan amortization schedule API, pay-per-request via x402 on Base (USDC).","tagline":"Loan amortization schedule API, pay-per-request via x402 on Base (USDC).","description":"This endpoint at lowpaymentfee.com returns a loan payment schedule for a specific loan (loan ID 33) via a POST request. It is part of a broader platform offering various pay-per-call APIs across data analytics, AI/ML, finance, and utility categories, all settled on the Base network using USDC through the x402 protocol.\n\nThe endpoint costs $0.02 per request (20,000 base units of USDC with 6 decimals). No API keys or accounts are required — payment is handled inline via the X-PAYMENT header. The platform advertises no rate limits and instant access. The specific resource path `/api/v1/loans/33/schedule` suggests it returns an amortization or payment schedule for a pre-configured loan, though the exact input parameters and response schema are not documented in the available crawl material.\n\nThe provider hosts a wide catalog of endpoints (analytics, AI, finance, crypto, utilities) all at the same $0.02 price point. Documentation pages (/docs, /api, /pricing, /README) returned only a \"Connect wallet\" prompt with no substantive content, so details about request body format, response fields, and loan configuration are unknown. The endpoint is live and returns a valid x402 challenge.","tags":[],"capabilities":["loan-schedule","amortization","financial-calculation","x402-payment","usdc-settlement","base-network","pay-per-request"],"categories":["finance"],"synonyms":["loan amortization schedule","payment schedule API","loan calculator","mortgage schedule","loan repayment plan","amortization table"],"warnings":["No API documentation available — /docs, /api, /pricing, and /README all return only a wallet-connect prompt with no content","Request body schema and response format are completely undocumented","The endpoint is hardcoded to loan ID 33; it is unclear whether other loan IDs are available or how loans are configured","The broader platform lists many endpoint categories but none appear to have public documentation"],"endpointUrl":"https://lowpaymentfee.com/api/v1/loans/33/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/33/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 and returns a valid x402 challenge, but there is no documentation for request/response schemas, no OpenAPI spec, and the docs pages are empty. The specific purpose (loan 33 schedule) is narrow and unexplained. Effectively a stub 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'/api/v1/loans/33/schedule':126 '/docs':179 '/pricing':181 '/readme':182 '0.02':84,174 '000':88 '20':87 '33':42 '6':94 'access':121 'account':100 'across':61 'advertis':115 'ai':166 'ai/ml':64 'amort':2,15,131 'amortization' 'amortization table' 'analyt':63,165 'api':4,17,60,97 'avail':154 'base':12,25,73,89 'base-network' 'bodi':197 'broader':52 'call':59 'catalog':162 'categori':68 'challeng':215 'configur':139,203 'connect':186 'content':192 'cost':83 'crawl':155 'crypto':168 'data':62 'decim':95 'detail':194 'document':151,177 'endpoint':28,82,164,207 'exact':143 'field':200 'financ':65,167 'financial-calculation' 'format':198 'handl':105 'header':112 'host':159 'id':41 'inlin':106 'input':144 'instant':120 'key':98 'limit':118 'live':209 'loan':1,14,33,39,40,140,202 'loan amortization schedule' 'loan calculator' 'loan repayment plan' 'loan-schedule' 'lowpaymentfee.com':30 'materi':156 'mortgage schedule' 'network':74 'offer':54 'page':178 'paramet':145 'part':49 'path':125 'pay':6,19,57 'pay-per-cal':56 'pay-per-request':5,18 'payment':34,103,111,133 'payment schedule API' 'per':7,20,58,85 'platform':53,114 'point':176 'post':45 'pre':138 'pre-configur':137 'price':175 'prompt':188 'protocol':80 'provid':158 'rate':117 'request':8,21,46,86,196 'requir':102 'resourc':124 'respons':147,199 'return':31,129,183,211 'schedul':3,16,35,134 'schema':148 'settl':70 'specif':38,123 'substant':191 'suggest':127 'though':141 'unit':90 'unknown':205 'usdc':13,26,76,92 'usdc-settlement' 'use':75 'util':67,169 'valid':213 'various':55 'via':9,22,43,107 'wallet':187 'wide':161 'x':110 'x-payment':109 'x402':10,23,79,214 'x402-payment'","prices":[{"id":"49edf6ba-72fe-49c9-862b-bb5b4090378d","listingId":"aa290331-b1de-4685-9cb4-ebaeaf51deab","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/33/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":"2026-04-18T18:47:31.953Z"}],"sources":[{"listingId":"aa290331-b1de-4685-9cb4-ebaeaf51deab","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/loans/33/schedule","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:47:31.953Z","lastSeenAt":"2026-04-29T10:34:59.804Z"}],"details":{"listingId":"aa290331-b1de-4685-9cb4-ebaeaf51deab","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/loans/33/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 a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/loans/33/schedule"},{"claim":"The platform charges $0.02 per request with no API keys, no rate limits, and instant access on the Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/loans/33/schedule"}],"useCases":["Retrieve a loan payment schedule programmatically for financial planning tools","Integrate amortization data into lending or fintech applications","Agent-driven loan analysis without requiring API key registration"],"bestFor":["Developers needing quick loan schedule data without signup","AI agents that can settle payments via x402/USDC on Base","Prototyping fintech features with low per-call costs"],"notFor":["Production systems requiring documented and stable API contracts","Users who need to configure arbitrary loan parameters (only loan ID 33 is exposed at this path)","Applications requiring fiat-only payment methods"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:15.434Z"},"updatedAt":"2026-04-29T10:34:59.804Z"}}