{"id":"173df30d-5a2b-4a77-a1cd-52a536d7cfaa","shortId":"k9dVjG","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 40 in the URL path). It is part of a broader platform offering various pay-per-call APIs across data analytics, AI/ML, finance, and utility categories, all settled via the x402 protocol on the Base network using USDC.\n\nThe endpoint is live and responds with a 402 Payment Required challenge, accepting x402 payments of up to 20,000 base units of USDC (0.02 USD, since USDC uses 6 decimals) per request. Payment is made via the \"exact\" scheme to a specified wallet address on Base. The response MIME type is application/json, and the endpoint accepts POST requests.\n\nDocumentation is extremely sparse — the docs, pricing, API, and README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no description of what parameters the POST body should contain or what the schedule response looks like. The loan schedule endpoint is not listed on the homepage's API catalog, which focuses on analytics, AI, finance, and utility endpoints. This makes it unclear whether loan ID 40 is a fixed demo resource or part of a dynamic loans collection. Users should expect to experiment or contact the provider for integration details.","tags":[],"capabilities":["loan-amortization-schedule","x402-payment","usdc-settlement","base-network","pay-per-request","json-response"],"categories":["finance"],"synonyms":["loan schedule","amortization table","loan payment schedule","loan calculator API","mortgage schedule","repayment schedule","x402 finance API"],"warnings":["No API documentation available — docs, pricing, and README pages all render only a wallet-connect prompt with no content.","No OpenAPI or request/response schema provided; request body format and response structure are unknown.","This specific endpoint (/api/v1/loans/40/schedule) is not listed among the provider's advertised APIs on the homepage, raising questions about its intended availability.","Loan ID 40 appears hardcoded in the URL; it is unclear if other loan IDs exist or how loans are created."],"endpointUrl":"https://lowpaymentfee.com/api/v1/loans/40/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/40/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 USDC on Base), but there is no documentation, no OpenAPI schema, no request/response examples, and the specific loan schedule endpoint isn't even listed on the provider's homepage. Effectively a stub 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'000':100 '20':99 '40':42,217 '402':89 '6':110 'accept':93,137 'across':61 'address':125 'ai':205 'ai/ml':64 'amort':2,15,34 'amortization table' 'analyt':63,204 'api':4,17,60,147,199 'application/json':133 'base':12,25,77,101,127 'base-network' 'bodi':178 'broader':52 'call':59 'catalog':200 'categori':68 'challeng':92 'collect':229 'connect':155 'contact':236 'contain':180 'content':161 'data':62 'decim':111 'demo':221 'descript':172 'detail':241 'doc':145 'document':140 'dynam':227 'endpoint':28,82,136,191,209 'exact':119 'exampl':169 'expect':232 'experi':234 'extrem':142 'financ':65,206 'fix':220 'focus':202 'homepag':197 'id':41,216 'integr':240 'json-response' 'like':187 'list':194 'live':84 'loan':1,14,33,39,40,189,215,228 'loan calculator API' 'loan payment schedule' 'loan schedule' 'loan-amortization-schedule' 'look':186 'lowpaymentfee.com':30 'made':116 'make':211 'mime':130 'mortgage schedule' 'network':78 'offer':54 'openapi':165 'page':150 'paramet':175 'part':49,224 'path':46 'pay':6,19,57 'pay-per-cal':56 'pay-per-request':5,18 'payment':90,95,114 'per':7,20,58,112 'platform':53 'post':138,177 'price':146 'prompt':157 'protocol':74 'provid':238 'readm':149 'render':152 'repayment schedule' 'request':8,21,113,139 'request/response':168 'requir':91 'resourc':222 'respond':86 'respons':129,185 'return':31 'schedul':3,16,35,184,190 'schema':166 'scheme':120 'settl':70 'sinc':107 'spars':143 'specif':38 'specifi':123 'type':131 'unclear':213 'unit':102 'url':45 'usd':106 'usdc':13,26,80,104,108 'usdc-settlement' 'use':79,109 'user':230 'util':67,208 'various':55 'via':9,22,71,117 'wallet':124,156 'whether':214 'x402':10,23,73,94 'x402 finance API' 'x402-payment'","prices":[{"id":"404a131e-a52b-4d87-939a-c3b6d05f31ea","listingId":"173df30d-5a2b-4a77-a1cd-52a536d7cfaa","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/40/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":"2026-04-18T18:47:37.414Z"}],"sources":[{"listingId":"173df30d-5a2b-4a77-a1cd-52a536d7cfaa","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/loans/40/schedule","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:47:37.414Z","lastSeenAt":"2026-04-29T09:35:01.663Z"}],"details":{"listingId":"173df30d-5a2b-4a77-a1cd-52a536d7cfaa","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/loans/40/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/40/schedule"},{"claim":"The platform advertises $0.02 per request pricing with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/loans/40/schedule"},{"claim":"Docs, pricing, API, and README pages render only a 'Connect wallet' prompt with no further content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieve a loan amortization schedule showing payment breakdowns over time","Integrate loan schedule data into financial planning tools","Automate loan analysis workflows with per-call micropayments"],"bestFor":["Agents or apps needing on-demand loan amortization data without API key management","Developers prototyping financial tools who want instant, keyless API access","Crypto-native applications that can settle payments on Base"],"notFor":["Production use requiring documented request/response schemas and SLAs","Bulk or high-volume loan data retrieval where per-request pricing is inefficient"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:15.128Z"},"updatedAt":"2026-04-29T09:35:01.663Z"}}