Loan amortization schedule API, pay-per-request via x402 on Base (USDC).
What it does
This endpoint at lowpaymentfee.com returns a loan payment schedule for a specific loan (loan ID 33) via a POST request. It is part of a broader platform offering various 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 endpoint costs $0.02 per request (20,000 base units of USDC with 6 decimals). No API keys or accounts are required — payment is handled inline via the X-PAYMENT header. The platform advertises no rate limits and instant access. The specific resource path `/api/v1/loans/33/schedule` suggests it returns an amortization or payment schedule for a pre-configured loan, though the exact input parameters and response schema are not documented in the available crawl material.
The provider hosts a wide catalog of endpoints (analytics, AI, finance, crypto, utilities) all at the same $0.02 price point. Documentation pages (/docs, /api, /pricing, /README) returned only a "Connect wallet" prompt with no substantive content, so details about request body format, response fields, and loan configuration are unknown. The endpoint is live and returns a valid x402 challenge.
Capabilities
Use cases
- —Retrieve a loan payment schedule programmatically for financial planning tools
- —Integrate amortization data into lending or fintech applications
- —Agent-driven loan analysis without requiring API key registration
Fit
Best for
- —Developers needing quick loan schedule data without signup
- —AI agents that can settle payments via x402/USDC on Base
- —Prototyping fintech features with low per-call costs
Not for
- —Production systems requiring documented and stable API contracts
- —Users who need to configure arbitrary loan parameters (only loan ID 33 is exposed at this path)
- —Applications requiring fiat-only payment methods
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/loans/33/schedule \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, but there is no documentation for request/response schemas, no OpenAPI spec, and the docs pages are empty. The specific purpose (loan 33 schedule) is narrow and unexplained. Effectively a stub listing.
Warnings
- —No API documentation available — /docs, /api, /pricing, and /README all return only a wallet-connect prompt with no content
- —Request body schema and response format are completely undocumented
- —The endpoint is hardcoded to loan ID 33; it is unclear whether other loan IDs are available or how loans are configured
- —The broader platform lists many endpoint categories but none appear to have public documentation
Citations
- —The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/loans/33/schedule
- —The platform charges $0.02 per request with no API keys, no rate limits, and instant access on the Base networkhttps://lowpaymentfee.com
- —USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base networkhttps://lowpaymentfee.com/api/v1/loans/33/schedule