Loan amortization schedule API, pay-per-request via x402 on Base (USDC).
What it does
This endpoint at lowpaymentfee.com returns a loan amortization schedule for a specific loan (loan ID 59) via a POST request. It is part of a broader platform offering pay-per-call APIs across data analytics, AI/ML, finance, and utility categories, all settled on the Base network using USDC through the x402 protocol.
The x402 challenge confirms the endpoint is live and accepts payments of up to $0.02 per request (20,000 base units of USDC with 6 decimals = $0.02). No API keys or rate limits are advertised; access is granted instantly upon payment. The response MIME type is application/json.
However, the specific endpoint `/api/v1/loans/59/schedule` is not listed on the provider's homepage among the advertised API categories. The homepage showcases data/analytics, AI/ML, finance/Web3, and infrastructure endpoints — all at $0.02/request — but does not mention a loans or amortization schedule API. Documentation pages (docs, api, pricing, README) returned only a "Connect wallet" prompt with no substantive content. As a result, the request schema, expected POST body fields, and response structure for this loan schedule endpoint are unknown and must be discovered by the caller.
Capabilities
Use cases
- —Retrieving a detailed amortization schedule for a loan showing principal and interest breakdowns per period
- —Integrating loan payment projections into financial planning tools
- —Automating loan analysis workflows that need structured schedule data
Fit
Best for
- —Agents or apps needing on-demand loan amortization data without API key management
- —Micropayment-friendly finance queries settled in USDC on Base
- —Programmatic access to loan schedules without subscription commitments
Not for
- —Users who need comprehensive loan origination or servicing beyond schedule generation
- —Callers who require detailed API documentation and request/response schemas before integration
- —High-volume batch processing where per-request fees may accumulate significantly
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/loans/59/schedule \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402_payment_token>"Endpoint
Quality
The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02/request in USDC on Base). However, this specific loans/schedule endpoint is not documented anywhere on the provider's site, no request or response schema is available, and all documentation pages are empty stubs showing only 'Connect wallet'. The endpoint's purpose is inferred solely from its URL path.
Warnings
- —This specific endpoint (/api/v1/loans/59/schedule) is not listed among the provider's advertised APIs on the homepage
- —No documentation exists for request body format or response schema — all doc pages return only 'Connect wallet'
- —The loan ID (59) is hardcoded in the URL; it is unclear whether other loan IDs are supported or how loans are created
- —Provider site appears to be a generic x402 API storefront; the actual data sources and reliability are unknown
Citations
- —The endpoint returns HTTP 402 with an x402 challenge advertising USDC payment on Base networkhttps://lowpaymentfee.com/api/v1/loans/59/schedule
- —maxAmountRequired is 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913), which equals $0.02https://lowpaymentfee.com/api/v1/loans/59/schedule
- —The provider advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —The loans/schedule endpoint is not listed among the provider's advertised API categories on the homepagehttps://lowpaymentfee.com