{"id":"32c6b183-1103-43f1-ac39-95e1d78222f9","shortId":"9Aq2GK","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 49 in this 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 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 a specified wallet address. The endpoint accepts POST requests and returns JSON. No API keys or rate limits are advertised — access is gated purely by micropayment.\n\nDocumentation is extremely sparse. The crawled docs, pricing, and API 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 endpoint expects or returns. The loan ID (49) is hardcoded in the path, and it is unclear whether other loan IDs are available or how loans are created. The platform's landing page lists many endpoint categories but this specific loans/schedule endpoint is not among the advertised APIs, raising questions about its intended audience and completeness.","tags":[],"capabilities":["loan-amortization-schedule","x402-payment","usdc-micropayment","base-network","pay-per-request","json-api"],"categories":["finance"],"synonyms":["loan schedule","amortization calculator","loan payment schedule","debt repayment plan","loan amortization API","payment schedule"],"warnings":["No documentation available — docs, pricing, and API 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/49/schedule) is not listed among the provider's advertised APIs on the landing page.","Loan ID 49 is hardcoded in the path; it is unclear how to access other loans or whether this is a demo resource."],"endpointUrl":"https://lowpaymentfee.com/api/v1/loans/49/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/49/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 confirmed) and pricing is clear ($0.02/request in USDC on Base). However, there is no documentation, no OpenAPI schema, no request/response examples, and the specific loans/schedule endpoint is not listed on the provider's own landing page. The loan ID is hardcoded with no explanation. This is effectively a stub 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'000':96 '20':95 '402':88 '49':42,191 '6':106 'accept':125 'access':139 'across':61 'address':122 'advertis':138,230 'ai/ml':64 'among':228 'amort':2,15,34 'amortization calculator' 'analyt':63 'api':4,17,60,132,154,231 'audienc':237 'avail':206 'base':12,25,77,97 'base-network' 'broader':52 'call':59 'categori':68,220 'challeng':89 'complet':239 'connect':160 'content':166 'crawl':150 'creat':211 'data':62 'debt repayment plan' 'decim':107 'descript':177 'doc':151 'document':145 'endpoint':28,82,124,184,219,225 'exact':116 'exampl':174 'expect':185 'extrem':147 'field':180 'financ':65 'gate':141 'hardcod':193 'id':41,190,204 'intend':236 'json':130 'json-api' 'key':133 'land':215 'limit':136 'list':217 'live':84 'loan':1,14,33,39,40,182,189,203,209 'loan amortization API' 'loan payment schedule' 'loan schedule' 'loan-amortization-schedule' 'loans/schedule':224 'lowpaymentfee.com':30 'made':112 'mani':218 'micropay':144 'network':78 'offer':54 'openapi':170 'page':155,216 'part':49 'path':46,196 'pay':6,19,57 'pay-per-cal':56 'pay-per-request':5,18 'payment':91,110 'payment schedule' 'per':7,20,58,108 'platform':53,213 'post':126 'price':152 'prompt':162 'protocol':74 'pure':142 'question':233 'rais':232 'rate':135 'render':157 'request':8,21,90,109,127 'request/response':173 'return':31,86,129,187 'schedul':3,16,35,183 'schema':171 'scheme':117 'settl':70 'sinc':103 'spars':148 'specif':38,223 'specifi':120 'unclear':200 'unit':98 'url':45 'usd':102 'usdc':13,26,80,100,104 'usdc-micropayment' 'use':79,105 'util':67 'various':55 'via':9,22,71,113 'wallet':121,161 'whether':201 'x402':10,23,73,115 'x402-payment'","prices":[{"id":"0faf321c-e883-41d8-a2ed-f0de60e39254","listingId":"32c6b183-1103-43f1-ac39-95e1d78222f9","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/49/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":"2026-04-18T18:47:31.963Z"}],"sources":[{"listingId":"32c6b183-1103-43f1-ac39-95e1d78222f9","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/loans/49/schedule","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:47:31.963Z","lastSeenAt":"2026-04-29T10:34:59.832Z"}],"details":{"listingId":"32c6b183-1103-43f1-ac39-95e1d78222f9","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/loans/49/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/49/schedule"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/loans/49/schedule"},{"claim":"Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"Docs, pricing, and API pages render only a Connect wallet prompt with no further content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieve a loan amortization schedule showing principal and interest breakdowns per period","Integrate loan payment calculations into financial planning tools","Programmatic access to structured loan repayment data for agents or dashboards"],"bestFor":["Developers needing on-demand loan schedule data without API key management","AI agents that can settle x402 micropayments for financial data","Applications requiring pay-per-use loan amortization calculations"],"notFor":["Users who need comprehensive loan origination or management (only schedule retrieval is evident)","Anyone without a Base-network USDC wallet for x402 payments","Production use cases requiring documented request/response schemas"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:15.375Z"},"updatedAt":"2026-04-29T10:34:59.832Z"}}