{"id":"57cfd2d4-c89e-4095-b5fd-179b847af867","shortId":"fTnu2A","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 amortization schedule for a specific loan (loan ID 66) via a POST request. It is part of a broader platform offering pay-per-call APIs across data analytics, AI/ML, finance, and utility categories, all settled on the Base network using USDC through the x402 payment protocol.\n\nThe x402 challenge confirms the endpoint is live and accepts payments of up to $0.02 per request (20,000 base units of USDC with 6 decimals = $0.02). Payment is made via the x402 exact scheme to a specified wallet address on Base. The response MIME type is application/json. No API keys or rate limits are advertised — access is gated purely by micropayment.\n\nDocumentation is extremely sparse. The crawled docs, pricing, and API pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI spec, no request/response schema documentation, and no examples of what the loan schedule response looks like or what POST body parameters are expected. The endpoint path suggests it returns a payment schedule for a pre-existing loan resource (ID 66), but it is unclear whether the loan ID is fixed or if other loan IDs are available, or whether the POST body configures the schedule calculation. The platform's landing page lists many endpoint categories but this specific loans endpoint is not among those advertised on the homepage.","tags":[],"capabilities":["loan-amortization-schedule","x402-payment","usdc-micropayment","base-network","pay-per-request","json-response"],"categories":["finance"],"synonyms":["loan schedule","amortization table","loan payment schedule","loan calculator","payment plan","debt schedule","mortgage schedule"],"warnings":["No API documentation available — docs, pricing, and API pages all render only a wallet-connect prompt with no content.","No request body schema or response schema documented; it is unknown what parameters the POST expects.","This specific /api/v1/loans/66/schedule endpoint is not listed among the provider's advertised APIs on the homepage.","Loan ID 66 appears hardcoded in the URL; unclear if other loan IDs exist or if this is a demo resource."],"endpointUrl":"https://lowpaymentfee.com/api/v1/loans/66/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/66/schedule","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is live (402 challenge captured) and pricing is clear ($0.02/request in USDC on Base), but there is no documentation, no OpenAPI spec, no request/response schema, and no examples. The specific loans endpoint is not even listed on the provider's homepage. This is effectively a stub 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'000':99 '20':98 '6':105 '66':42,209 'accept':90 'access':137 'across':60 'address':120 'advertis':136,254 'ai/ml':63 'among':252 'amort':2,15,34 'amortization table' 'analyt':62 'api':4,17,59,130,152 'application/json':128 'avail':226 'base':12,25,72,100,122 'base-network' 'bodi':188,231 'broader':52 'calcul':235 'call':58 'categori':67,244 'challeng':83 'configur':232 'confirm':84 'connect':158 'content':164 'crawl':148 'data':61 'debt schedule' 'decim':106 'doc':149 'document':143,173 'endpoint':28,86,193,243,249 'exact':114 'exampl':176 'exist':205 'expect':191 'extrem':145 'financ':64 'fix':219 'gate':139 'homepag':257 'id':41,208,217,224 'json-response' 'key':131 'land':239 'like':184 'limit':134 'list':241 'live':88 'loan':1,14,33,39,40,180,206,216,223,248 'loan calculator' 'loan payment schedule' 'loan schedule' 'loan-amortization-schedule' 'look':183 'lowpaymentfee.com':30 'made':110 'mani':242 'micropay':142 'mime':125 'mortgage schedule' 'network':73 'offer':54 'openapi':168 'page':153,240 'paramet':189 'part':49 'path':194 'pay':6,19,56 'pay-per-cal':55 'pay-per-request':5,18 'payment':79,91,108,199 'payment plan' 'per':7,20,57,96 'platform':53,237 'post':45,187,230 'pre':204 'pre-exist':203 'price':150 'prompt':160 'protocol':80 'pure':140 'rate':133 'render':155 'request':8,21,46,97 'request/response':171 'resourc':207 'respons':124,182 'return':31,197 'schedul':3,16,35,181,200,234 'schema':172 'scheme':115 'settl':69 'spars':146 'spec':169 'specif':38,247 'specifi':118 'suggest':195 'type':126 'unclear':213 'unit':101 'usdc':13,26,75,103 'usdc-micropayment' 'use':74 'util':66 'via':9,22,43,111 'wallet':119,159 'whether':214,228 'x402':10,23,78,82,113 'x402-payment'","prices":[{"id":"f76dc18d-d1e8-4378-bb5c-258fcee9c77d","listingId":"57cfd2d4-c89e-4095-b5fd-179b847af867","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/66/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":"2026-04-18T18:47:47.622Z"}],"sources":[{"listingId":"57cfd2d4-c89e-4095-b5fd-179b847af867","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/loans/66/schedule","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:47:47.622Z","lastSeenAt":"2026-04-29T08:05:48.625Z"}],"details":{"listingId":"57cfd2d4-c89e-4095-b5fd-179b847af867","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/loans/66/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/66/schedule"},{"claim":"maxAmountRequired is 20000 base units of USDC (USD Coin, 6 decimals) = $0.02","source_url":"https://lowpaymentfee.com/api/v1/loans/66/schedule"},{"claim":"Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"Docs, pricing, and API pages render only a Connect wallet prompt with no further documentation","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieve an amortization schedule for a loan to understand payment breakdowns over time","Integrate loan schedule data into a financial planning application","Programmatically fetch loan repayment details for portfolio analysis"],"bestFor":["Agents needing on-demand loan schedule data without API key management","Micropayment-gated financial data access on Base/USDC","Developers prototyping financial tools who want instant pay-per-call access"],"notFor":["Bulk or high-volume loan schedule generation (no documented batch support)","Users who need detailed API documentation or request/response schemas before integrating"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:14.642Z"},"updatedAt":"2026-04-29T08:05:48.625Z"}}