{"id":"89b08d5c-b3c5-4815-a23a-8ee9515aa594","shortId":"zfJG7Y","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 26) via a POST request. 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 charges $0.02 per request (20,000 base units of USDC with 6 decimals). Payment is handled inline via the X-PAYMENT header; no API keys, accounts, or rate limits are required. The x402 challenge was successfully captured, confirming the endpoint is live and accepting payments to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3.\n\nDocumentation is extremely sparse — the docs, API, pricing, 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 fields the loan schedule returns or what input parameters the POST body expects. The endpoint path suggests it serves a pre-existing loan record (ID 26), but it is unclear whether the body accepts parameters like loan amount, term, or interest rate, or whether it simply returns a fixed schedule. Use with caution until better documentation is available.","tags":[],"capabilities":["loan-schedule","amortization","x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key"],"categories":["finance"],"synonyms":["loan amortization","payment schedule","loan calculator","amortization table","loan repayment schedule","mortgage schedule","debt schedule"],"warnings":["No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no content.","No OpenAPI or request/response schema provided; input parameters and output format are unknown.","The endpoint path is hardcoded to loan ID 26; it is unclear if other loan IDs are supported or if parameters can be customized.","The platform lists many diverse API categories (AI, analytics, finance, utils) all at $0.02 — the actual depth and quality of each endpoint is unverifiable."],"endpointUrl":"https://lowpaymentfee.com/api/v1/loans/26/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/26/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 captured) and pricing is clear ($0.02/request in USDC on Base), but there is no documentation, no OpenAPI schema, no request/response examples, and the purpose of the specific loan ID 26 path is ambiguous. Effectively a stub 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'000':90 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':133 '20':89 '26':42,195 '6':96 'accept':129,203 'account':111 'address':132 'ai/ml':64 'amort':2,15,34 'amortization' 'amortization table' 'amount':207 'analyt':63 'api':4,17,60,109,140 'avail':227 'base':12,25,79,91 'base-network' 'better':224 'bodi':180,202 'broader':52 'call':59 'captur':122 'caution':222 'challeng':119 'charg':85 'confirm':123 'connect':149 'content':155 'crypto':67 'data':62 'debt schedule' 'decim':97 'descript':166 'doc':139 'document':134,225 'endpoint':28,84,125,183 'exampl':163 'exist':191 'expect':181 'extrem':136 'field':169 'financ':66 'fix':218 'handl':100 'header':107 'id':41,194 'infer':65 'inlin':101 'input':176 'interest':210 'key':110 'like':205 'limit':114 'live':127 'loan':1,14,33,39,40,171,192,206 'loan amortization' 'loan calculator' 'loan repayment schedule' 'loan-schedule' 'lowpaymentfee.com':30 'mortgage schedule' 'network':80 'no-api-key' 'offer':54 'openapi':159 'page':144 'paramet':177,204 'part':49 'path':184 'pay':6,19,57 'pay-per-cal':56 'pay-per-request':5,18 'payment':98,106,130 'payment schedule' 'per':7,20,58,87 'platform':53 'post':45,179 'pre':190 'pre-exist':189 'price':141 'prompt':151 'protocol':76 'rate':113,211 'readm':143 'record':193 'render':146 'request':8,21,46,88 'request/response':162 'requir':116 'return':31,173,216 'schedul':3,16,35,172,219 'schema':160 'serv':187 'servic':70 'settl':72 'simpli':215 'span':61 'spars':137 'specif':38 'success':121 'suggest':185 'term':208 'unclear':199 'unit':92 'usdc':13,26,82,94 'usdc-settlement' 'use':81,220 'util':69 'various':55 'via':9,22,43,73,102 'wallet':150 'whether':200,213 'x':105 'x-payment':104 'x402':10,23,75,118 'x402-payment'","prices":[{"id":"f7bebfb2-ceba-403b-a6c5-48ce9f72f9e8","listingId":"89b08d5c-b3c5-4815-a23a-8ee9515aa594","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/26/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":"2026-04-18T18:47:29.525Z"}],"sources":[{"listingId":"89b08d5c-b3c5-4815-a23a-8ee9515aa594","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/loans/26/schedule","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:47:29.525Z","lastSeenAt":"2026-04-29T10:34:59.703Z"}],"details":{"listingId":"89b08d5c-b3c5-4815-a23a-8ee9515aa594","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/loans/26/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 advertising USDC payment on Base network","source_url":"https://lowpaymentfee.com/api/v1/loans/26/schedule"},{"claim":"Price is $0.02 per request (20,000 base units USDC, 6 decimals)","source_url":"https://lowpaymentfee.com"},{"claim":"No API keys, no rate limits, instant access advertised","source_url":"https://lowpaymentfee.com"},{"claim":"Payment asset is USDC at contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/loans/26/schedule"}],"useCases":["Retrieving an amortization schedule for a loan to understand payment breakdowns","Integrating loan schedule data into a financial planning application","Agents autonomously fetching loan payment details without pre-registration"],"bestFor":["Developers needing quick, keyless access to loan schedule data","AI agents that can settle micropayments on Base via x402","Applications requiring on-demand financial calculations without subscription overhead"],"notFor":["Users who need comprehensive loan origination or underwriting services","Applications requiring bulk or batch loan schedule generation at scale (no documented batch endpoint)","Users without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:15.546Z"},"updatedAt":"2026-04-29T10:34:59.703Z"}}