{"id":"b38fe2bc-0d5b-4157-b300-a5036c09c219","shortId":"FxTZrG","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 22 in the URL path). It is part of a broader platform offering various pay-per-call APIs spanning data analytics, AI/ML inference, finance, crypto, and utility services — all settled via the x402 protocol on the Base network using USDC.\n\nThe endpoint is live and returns a 402 challenge requesting payment of up to 20,000 base units of USDC (0.02 USD, since USDC uses 6 decimals) per request. Payment is made via the x402 \"exact\" scheme to the specified wallet address on Base. The response MIME type is application/json. The endpoint accepts POST requests and is marked as discoverable.\n\nDocumentation beyond the landing page is extremely sparse — the /docs, /api, /pricing, and /README pages all render only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI schema, no request body documentation, and no example responses available. The specific loan schedule endpoint is not listed on the homepage (which advertises analytics, AI, finance, and utility endpoints), so its exact input parameters and output format are unknown. The platform advertises a flat $0.02/request pricing model with no API keys, no rate limits, and instant access.","tags":[],"capabilities":["loan-amortization-schedule","x402-payment","usdc-settlement","base-network","pay-per-request","json-response"],"categories":["finance"],"synonyms":["loan schedule","amortization calculator","loan payment schedule","payment breakdown","loan repayment API","mortgage schedule"],"warnings":["No API documentation available — /docs, /pricing, /api, and /README pages all show only 'Connect wallet' with no content","No OpenAPI or request/response schema provided; input parameters for the loan schedule endpoint are unknown","This specific endpoint (/api/v1/loans/22/schedule) is not listed among the provider's advertised APIs on the homepage","Loan ID 22 is hardcoded in the URL path — unclear if other loan IDs are supported or how loans are created"],"endpointUrl":"https://lowpaymentfee.com/api/v1/loans/22/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/22/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 and returns a valid x402 402 challenge, but there is no documentation, no OpenAPI schema, no request/response examples, and the specific endpoint (/loans/22/schedule) is not even listed on the provider's homepage. The docs pages are empty. Input parameters and output format are entirely 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'/docs':152 '/pricing':154 '/readme':156 '/request':218 '0.02':103,217 '000':98 '20':97 '22':42 '402':90 '6':108 'accept':135 'access':230 'address':124 'advertis':195,214 'ai':197 'ai/ml':64 'amort':2,15,34 'amortization calculator' 'analyt':63,196 'api':4,17,60,223 'application/json':132 'avail':182 'base':12,25,79,99,126 'base-network' 'beyond':144 'bodi':176 'broader':52 'call':59 'challeng':91 'connect':162 'content':168 'crypto':67 'data':62 'decim':109 'discover':142 'document':143,177 'endpoint':28,84,134,187,201 'exact':118,204 'exampl':180 'extrem':149 'financ':66,198 'flat':216 'format':209 'homepag':193 'id':41 'infer':65 'input':205 'instant':229 'json-response' 'key':224 'land':146 'limit':227 'list':190 'live':86 'loan':1,14,33,39,40,185 'loan payment schedule' 'loan repayment API' 'loan schedule' 'loan-amortization-schedule' 'lowpaymentfee.com':30 'made':114 'mark':140 'mime':129 'model':220 'mortgage schedule' 'network':80 'offer':54 'openapi':172 'output':208 'page':147,157 'paramet':206 'part':49 'path':46 'pay':6,19,57 'pay-per-cal':56 'pay-per-request':5,18 'payment':93,112 'payment breakdown' 'per':7,20,58,110 'platform':53,213 'post':136 'price':219 'prompt':164 'protocol':76 'rate':226 'render':159 'request':8,21,92,111,137,175 'respons':128,181 'return':31,88 'schedul':3,16,35,186 'schema':173 'scheme':119 'servic':70 'settl':72 'sinc':105 'span':61 'spars':150 'specif':38,184 'specifi':122 'substant':167 'type':130 'unit':100 'unknown':211 'url':45 'usd':104 'usdc':13,26,82,102,106 'usdc-settlement' 'use':81,107 'util':69,200 'various':55 'via':9,22,73,115 'wallet':123,163 'x402':10,23,75,117 'x402-payment'","prices":[{"id":"1ef85bc3-5a2a-46ad-97e9-38256695a129","listingId":"b38fe2bc-0d5b-4157-b300-a5036c09c219","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/22/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":"2026-04-18T18:47:22.815Z"}],"sources":[{"listingId":"b38fe2bc-0d5b-4157-b300-a5036c09c219","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/loans/22/schedule","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:47:22.815Z","lastSeenAt":"2026-04-29T11:34:03.612Z"}],"details":{"listingId":"b38fe2bc-0d5b-4157-b300-a5036c09c219","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/loans/22/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 challenge with maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/loans/22/schedule"},{"claim":"Platform advertises $0.02/request flat pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/loans/22/schedule"}],"useCases":["Retrieving an amortization schedule for a given loan to display payment breakdowns","Integrating loan schedule data into financial planning tools","Agents autonomously fetching loan repayment details with micropayments"],"bestFor":["Developers needing on-demand loan schedule data without API key management","AI agents that can settle x402 micropayments on Base","Applications requiring pay-per-use financial calculations"],"notFor":["Users who need detailed API documentation or OpenAPI specs before integrating","Bulk loan portfolio analysis requiring thousands of calls (no documented batch endpoint)","Users without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:15.826Z"},"updatedAt":"2026-04-29T11:34:03.612Z"}}