{"id":"ec718bad-a9a5-4363-8a20-122435592db2","shortId":"k5hzQP","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/8/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 specific endpoint path suggests it returns a payment schedule for a loan identified by ID 8, though no detailed input/output schema or documentation beyond the landing page is available.\n\nThe provider's site lists many other endpoints across categories like AI/ML (sentiment, summarization, classification, embeddings), finance (price feeds, exchange rates, token quotes, gas estimates), and infrastructure (geocoding, validation, conversion, generation), all at the same $0.02 per-request price point. Documentation pages (`/docs`, `/pricing`, `/api`, `/README`) returned only a \"Connect wallet\" prompt with no substantive content, so the exact request body format and response schema for this loan schedule endpoint remain unknown.","tags":[],"capabilities":["loan-amortization-schedule","x402-payment","usdc-base-network","pay-per-call","json-response","no-api-key"],"categories":["finance"],"synonyms":["loan schedule","amortization calculator","loan payment schedule","payment plan API","loan repayment schedule","mortgage schedule"],"warnings":["No documentation available — /docs, /pricing, /api, and /README all return only a 'Connect wallet' prompt with no content.","No input or output schema provided; request body format is unknown.","The loan ID '8' is hardcoded in the path — unclear if this is a demo or a fixed resource.","The endpoint description is generic ('Premium API Access') and does not describe the actual functionality."],"endpointUrl":"https://lowpaymentfee.com/api/v1/loans/8/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/8/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 confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no OpenAPI schema, no example request/response, and the docs pages are empty. The specific purpose of the '/loans/8/schedule' path is inferred from the URL pattern 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'/api/v1/loans/8/schedule':43 '/docs':202 '/pricing':203 '/readme':205 '0.02':10,24,69,117,194 '000':113 '0x8335':103 '20':112 '2913':104 '6':121 '8':145 'accept':95 'across':167 'ai':54 'ai/ml':170 'amort':2,16,36 'amortization calculator' 'amount':110 'analyt':53 'api':4,18,58,77 'application/json':128 'avail':158 'base':14,28,74,106,114 'behind':61 'beyond':153 'bodi':220 'broader':49 'call':8,22,67 'categori':168 'challeng':88 'classif':173 'confirm':89 'connect':209 'content':215 'contract':102 'convers':188 'cost':68 'data':52 'decim':122 'detail':148 'document':152,200 'embed':174 'endpoint':30,91,131,166,229 'estim':183 'exact':97,218 'exact-schem':96 'exchang':178 'feed':177 'financ':55,175 'format':221 'gas':182 'gate':60 'generat':189 'geocod':186 'given':118 'i.e':116 'id':144 'identifi':142 'infrastructur':185 'input/output':149 'json-response' 'key':78 'land':155 'like':169 'limit':81 'list':163 'live':93 'loan':1,15,35,141,227 'loan payment schedule' 'loan repayment schedule' 'loan schedule' 'loan-amortization-schedule' 'lowpaymentfee.com':32 'mani':164 'maximum':109 'mime':125 'mortgage schedule' 'network':75 'no-api-key' 'offer':51 'page':156,201 'part':46 'path':132 'pay':6,20 'pay-per-cal':5,19 'pay-per-call' 'payment':64,99,137 'payment plan API' 'per':7,21,196 'per-request':195 'platform':50 'point':199 'post':40 'price':176,198 'prompt':211 'protocol':65 'provid':33,160 'quot':181 'rate':80,179 'remain':230 'request':41,197,219 'requir':85 'respons':124,223 'return':135,206 'schedul':3,17,37,138,228 'schema':150,224 'scheme':98 'sentiment':171 'site':162 'specif':130 'subscript':84 'substant':214 'suggest':133 'summar':172 'though':146 'token':180 'type':126 'unit':115 'unknown':231 'usdc':12,26,71,101,119 'usdc-base-network' 'util':57 'valid':187 'via':11,25,38 'wallet':210 'x402':63,87 'x402-payment'","prices":[{"id":"983074b4-37e7-4384-a0e6-0916081546bf","listingId":"ec718bad-a9a5-4363-8a20-122435592db2","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/8/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":"2026-04-18T18:48:07.556Z"}],"sources":[{"listingId":"ec718bad-a9a5-4363-8a20-122435592db2","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/loans/8/schedule","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:48:07.556Z","lastSeenAt":"2026-04-29T05:34:21.867Z"}],"details":{"listingId":"ec718bad-a9a5-4363-8a20-122435592db2","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/loans/8/schedule \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-token>\" \\\n  -d '{}'","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units in USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/loans/8/schedule"},{"claim":"All APIs on the platform cost $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/loans/8/schedule"}],"useCases":["Generating an amortization schedule for a specific loan","Integrating loan payment breakdowns into financial dashboards","Agent-driven financial planning that needs per-call loan schedule data"],"bestFor":["Developers needing on-demand loan schedule calculations without subscriptions","AI agents that can settle micropayments in USDC on Base","Applications requiring pay-per-use financial computation endpoints"],"notFor":["Users who need bulk/batch loan calculations at volume discounts","Anyone without a Base-compatible USDC wallet","Use cases requiring detailed API documentation or OpenAPI specs before integration"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:13.679Z"},"updatedAt":"2026-04-29T05:34:21.867Z"}}