Loan amortization schedule API, pay-per-call at $0.02 via USDC on Base.
What it does
This x402-enabled endpoint at lowpaymentfee.com returns a loan payment schedule for a specific loan (loan ID 98 in the URL path). It is part of a broader platform offering various pay-per-request APIs spanning data analytics, AI/ML inference, finance, crypto, and utility services — all settled via USDC on the Base network using the x402 payment protocol.
The endpoint accepts POST requests and returns JSON. The x402 challenge advertises a maximum cost of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 per request (USDC uses 6 decimals). No API keys are required; payment is handled inline via the X-PAYMENT header. The platform advertises no rate limits and instant access.
Documentation 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 spec, no request/response schema documentation, and no examples of what fields the loan schedule endpoint expects or returns. The specific endpoint path suggests it retrieves or computes a payment schedule for loan ID 98, but the input parameters and output format are unknown. The broader site lists many endpoint categories but provides no detailed documentation for any of them.
Capabilities
Use cases
- —Retrieving a payment schedule for a specific loan
- —Computing amortization breakdowns for financial applications
- —Integrating loan schedule data into fintech dashboards
- —Agent-driven financial planning workflows that need per-call payment
Fit
Best for
- —Developers needing a simple pay-per-call loan schedule endpoint
- —AI agents that can settle USDC payments on Base automatically
- —Prototyping fintech features without API key management
Not for
- —Production use requiring documented request/response schemas
- —Bulk loan portfolio analysis (no batch endpoint documented)
- —Users who cannot transact in USDC on the Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/loans/98/schedule \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live (402 challenge captured) and pricing is clear ($0.02/request in USDC on Base), but there is zero documentation on request parameters, response schema, or what loan ID 98 represents. No OpenAPI spec, no examples, and all doc pages are empty. This is effectively a stub listing.
Warnings
- —No API documentation available — /docs, /pricing, /api, and /README pages all return only a wallet-connect prompt with no content.
- —No request or response schema is documented; input parameters and output format are entirely unknown.
- —The endpoint path is hardcoded to loan ID 98 — it is unclear whether other loan IDs are supported or how to create/reference loans.
- —No OpenAPI or ai-plugin manifest found.
Citations
- —The x402 challenge advertises maxAmountRequired of 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base networkhttps://lowpaymentfee.com/api/v1/loans/98/schedule
- —Platform pricing is $0.02 per request with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —The site lists APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com
- —Documentation pages (/docs, /pricing, /api, /README) render only a Connect wallet prompt with no substantive contenthttps://lowpaymentfee.com/docs