{"id":"5f1501a1-b58a-4a98-9bf2-33b542f90d24","shortId":"GyeBSe","kind":"x402","title":"Loan amortization schedule API, pay-per-call at $0.02 via USDC on Base.","tagline":"Loan amortization schedule API, pay-per-call at $0.02 via USDC on Base.","description":"This endpoint at lowpaymentfee.com provides a loan amortization schedule via a POST request to `/api/v1/loans/25/schedule`. It is part of a broader platform offering data, analytics, AI, finance, and utility APIs, all gated behind the x402 payment protocol. Each call costs $0.02 in USDC on the Base network — no API keys, no rate limits, and no subscriptions required.\n\nThe x402 challenge confirms the endpoint is live and accepts exact-scheme payments in USDC (contract `0x8335…2913` on Base) with a maximum amount of 20,000 base units (i.e., $0.02 given USDC's 6 decimals). The response MIME type is `application/json`. The endpoint is discoverable and uses HTTP POST.\n\nDocumentation beyond the landing page is extremely thin — the /docs, /pricing, /api, and /README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI spec, no request/response schema, and no example payloads available. The specific behavior of the `/loans/25/schedule` path (whether `25` is a loan ID, term length, or other parameter) is not documented. Consumers should expect to experiment or contact the provider for integration details.","tags":[],"capabilities":["loan-schedule","amortization","x402-payment","usdc-base","pay-per-call","json-api"],"categories":["finance"],"synonyms":["loan amortization schedule","loan payment schedule","loan calculator API","amortization table","mortgage schedule","loan repayment plan"],"warnings":["No API documentation available — /docs, /pricing, /api, and /README all return only a 'Connect wallet' prompt","No OpenAPI or JSON schema for request or response bodies","The meaning of '/loans/25/schedule' (what '25' represents) is not documented","No example requests or responses available from the provider"],"endpointUrl":"https://lowpaymentfee.com/api/v1/loans/25/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/25/schedule","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI spec, no request/response schema, no documentation beyond a wallet-connect prompt, and the semantics of the URL path (e.g., what '25' represents) are undocumented. This is effectively a stub 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'/api/v1/loans/25/schedule':43 '/docs':146 '/loans/25/schedule':181 '/pricing':147 '/readme':150 '0.02':10,24,69,117 '000':113 '0x8335':103 '20':112 '25':184 '2913':104 '6':121 'accept':95 'ai':54 'amort':2,16,36 'amortization' 'amortization table' 'amount':110 'analyt':53 'api':4,18,58,77 'application/json':128 'avail':175 'base':14,28,74,106,114 'behavior':178 'behind':61 'beyond':138 'broader':49 'call':8,22,67 'challeng':88 'confirm':89 'connect':156 'consum':197 'contact':203 'content':162 'contract':102 'cost':68 'data':52 'decim':122 'detail':208 'discover':132 'document':137,196 'endpoint':30,91,130 'exact':97 'exact-schem':96 'exampl':173 'expect':199 'experi':201 'extrem':143 'financ':55 'gate':60 'given':118 'http':135 'i.e':116 'id':188 'integr':207 'json-api' 'key':78 'land':140 'length':190 'limit':81 'live':93 'loan':1,15,35,187 'loan amortization schedule' 'loan calculator API' 'loan payment schedule' 'loan repayment plan' 'loan-schedule' 'lowpaymentfee.com':32 'maximum':109 'mime':125 'mortgage schedule' 'network':75 'offer':51 'openapi':166 'page':141,151 'paramet':193 'part':46 'path':182 'pay':6,20 'pay-per-cal':5,19 'pay-per-call' 'payload':174 'payment':64,99 'per':7,21 'platform':50 'post':40,136 'prompt':158 'protocol':65 'provid':33,205 'rate':80 'render':153 'request':41 'request/response':169 'requir':85 'respons':124 'schedul':3,17,37 'schema':170 'scheme':98 'spec':167 'specif':177 'subscript':84 'term':189 'thin':144 'type':126 'unit':115 'usdc':12,26,71,101,119 'usdc-base' 'use':134 'util':57 'via':11,25,38 'wallet':157 'whether':183 'x402':63,87 'x402-payment'","prices":[{"id":"dbebad30-6967-413d-8b6f-c859924079e7","listingId":"5f1501a1-b58a-4a98-9bf2-33b542f90d24","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/25/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":"2026-04-18T18:47:24.612Z"}],"sources":[{"listingId":"5f1501a1-b58a-4a98-9bf2-33b542f90d24","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/loans/25/schedule","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:47:24.612Z","lastSeenAt":"2026-04-29T11:05:20.039Z"}],"details":{"listingId":"5f1501a1-b58a-4a98-9bf2-33b542f90d24","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/loans/25/schedule \\\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":"Endpoint returns 402 with x402 challenge advertising USDC on Base, maxAmountRequired 20000 (=$0.02)","source_url":"https://lowpaymentfee.com/api/v1/loans/25/schedule"},{"claim":"Platform advertises $0.02/request pricing with no API keys, no rate limits, instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/loans/25/schedule"}],"useCases":["Generate an amortization schedule for a given loan","Integrate loan payment breakdowns into fintech applications","Provide borrowers with detailed repayment timelines","Automate loan schedule calculations without managing API keys"],"bestFor":["Developers building lending or mortgage tools","Fintech apps needing on-demand amortization tables","AI agents that need pay-per-call financial calculations"],"notFor":["Users who need detailed API documentation before integrating","High-volume batch processing where per-call pricing adds up","Non-crypto workflows that cannot settle payments in USDC on Base"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:15.78Z"},"updatedAt":"2026-04-29T11:05:20.039Z"}}