{"id":"3d99afa0-4ba9-4602-bde3-69652cdedfcc","shortId":"WAfGsp","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 88 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 returns a 402 Payment Required challenge, indicating it accepts x402 payments with a maximum cost of 20,000 base units of USDC (0.02 USD per request, since USDC uses 6 decimals). The payment is settled on-chain to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3. The endpoint accepts POST requests and returns application/json responses.\n\nDocumentation is extremely sparse. The crawled docs, API, pricing, and README pages all rendered only a \"Connect wallet\" prompt with no additional content. The specific loan schedule endpoint is not listed on the homepage's API catalog, and no request/response schema is documented. The endpoint path suggests it returns an amortization schedule for a pre-existing loan resource (ID 88), but the input parameters and response structure are unknown. The platform advertises no API keys, no rate limits, and instant access at a flat $0.02 per request across all endpoints.","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","mortgage schedule","loan repayment plan","payment breakdown","debt amortization"],"warnings":["No request or response schema documented for this endpoint","The endpoint path contains a hardcoded loan ID (88); unclear if other loan IDs are supported or how loans are created","All documentation pages (docs, API, pricing, README) returned only a 'Connect wallet' prompt with no content","This specific endpoint is not listed in the homepage API catalog"],"endpointUrl":"https://lowpaymentfee.com/api/v1/loans/88/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/88/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 for this specific endpoint, no request/response schema, and the loan ID is hardcoded in the path. The docs pages returned no useful content. This is effectively a stub 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'000':103 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':126 '20':102 '402':88 '6':115 '88':42,196 'accept':94,129 'access':217 'across':61,224 'addit':157 'address':125 'advertis':208 'ai/ml':64 'amort':2,15,34,186 'amortization calculator' 'analyt':63 'api':4,17,60,143,171,210 'application/json':134 'base':12,25,77,104 'base-network' 'broader':52 'call':59 'catalog':172 'categori':68 'chain':123 'challeng':91 'connect':152 'content':158 'cost':100 'crawl':141 'data':62 'debt amortization' 'decim':116 'doc':142 'document':136,178 'endpoint':28,82,128,163,180,226 'exist':192 'extrem':138 'financ':65 'flat':220 'homepag':169 'id':41,195 'indic':92 'input':199 'instant':216 'json-response' 'key':211 'limit':214 'list':166 'live':84 'loan':1,14,33,39,40,161,193 'loan payment schedule' 'loan repayment plan' 'loan schedule' 'loan-amortization-schedule' 'lowpaymentfee.com':30 'maximum':99 'mortgage schedule' 'network':78 'offer':54 'on-chain':121 'page':147 'paramet':200 'part':49 'path':46,181 'pay':6,19,57 'pay-per-cal':56 'pay-per-request':5,18 'payment':89,96,118 'payment breakdown' 'per':7,20,58,110,222 'platform':53,207 'post':130 'pre':191 'pre-exist':190 'price':144 'prompt':154 'protocol':74 'rate':213 'readm':146 'render':149 'request':8,21,111,131,223 'request/response':175 'requir':90 'resourc':194 'respons':135,202 'return':31,86,133,184 'schedul':3,16,35,162,187 'schema':176 'settl':70,120 'sinc':112 'spars':139 'specif':38,160 'structur':203 'suggest':182 'unit':105 'unknown':205 'url':45 'usd':109 'usdc':13,26,80,107,113 'usdc-settlement' 'use':79,114 'util':67 'various':55 'via':9,22,71 'wallet':153 'x402':10,23,73,95 'x402-payment'","prices":[{"id":"c85ab3b1-92b5-4524-b715-acbca4901505","listingId":"3d99afa0-4ba9-4602-bde3-69652cdedfcc","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/88/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":"2026-04-18T18:47:57.839Z"}],"sources":[{"listingId":"3d99afa0-4ba9-4602-bde3-69652cdedfcc","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/loans/88/schedule","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:47:57.839Z","lastSeenAt":"2026-04-29T07:34:32.457Z"}],"details":{"listingId":"3d99afa0-4ba9-4602-bde3-69652cdedfcc","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/loans/88/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","source_url":"https://lowpaymentfee.com/api/v1/loans/88/schedule"},{"claim":"Platform pricing is $0.02 per request with no API keys, no rate limits, and 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/88/schedule"}],"useCases":["Retrieving an amortization schedule for a loan to see payment breakdowns over time","Integrating loan schedule data into a financial planning application","Agents needing on-demand loan payment calculations without API key management"],"bestFor":["Developers needing quick, keyless access to loan schedule data","AI agents that can settle micropayments on Base via x402","Applications requiring per-call billing with no subscription commitment"],"notFor":["Users who need to create or configure custom loans (endpoint is for a fixed loan ID)","Applications requiring detailed API documentation or guaranteed SLAs","Users without access to USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:14.152Z"},"updatedAt":"2026-04-29T07:34:32.457Z"}}