Loan amortization schedule endpoint, pay-per-request via x402 on Base (USDC).
What it does
This x402-enabled endpoint at lowpaymentfee.com returns a loan amortization schedule for a specific loan (loan ID 97 in the URL path). It accepts POST requests and responds with JSON. Payment is settled on the Base network using USDC at $0.02 per request via the x402 exact-payment scheme.
The endpoint is part of a broader platform (lowpaymentfee.com) that advertises multiple API categories including data & analytics, AI/ML inference, finance & Web3, and infrastructure utilities — all priced at $0.02 per call. The platform emphasizes no API keys, no rate limits, and instant access. However, the specific endpoint listed here (/api/v1/loans/97/schedule) is not explicitly documented on the site's landing page among the advertised APIs, so its exact input schema and response format are unknown.
The x402 challenge is live and returns a valid 402 response with USDC (contract 0x8335…2913 on Base) as the accepted asset. The maxAmountRequired is 20000 base units, which at 6 decimals equals $0.02. No OpenAPI spec, detailed docs, or example responses were found in the crawl. The docs, API, pricing, and README pages all returned only a "Connect wallet" prompt with no substantive content.
Capabilities
Use cases
- —Retrieve a loan amortization schedule showing principal and interest breakdowns per period
- —Integrate loan payment calculations into a financial planning application
- —Programmatically fetch repayment schedules for display in lending dashboards
Fit
Best for
- —Agents or apps needing on-demand loan schedule data without API key management
- —Developers building financial tools who want pay-per-call pricing
- —Crypto-native applications that can settle micropayments on Base
Not for
- —Bulk batch processing of thousands of loan schedules (no documented batch endpoint)
- —Users who need detailed API documentation or OpenAPI specs before integrating
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/loans/97/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, there is no OpenAPI spec, no documentation of request/response schemas, no examples, and the specific /loans/97/schedule path is not listed among the site's advertised APIs. The docs pages returned no content. This is effectively a stub listing.
Warnings
- —No OpenAPI or schema documentation available for this endpoint
- —The /api/v1/loans/97/schedule path is not listed among the site's advertised APIs — it may be an unlisted or test endpoint
- —All documentation pages (docs, API, pricing, README) returned only a 'Connect wallet' prompt with no substantive content
- —Request body schema is unknown — unclear what parameters the POST endpoint expects
- —The loan ID (97) is hardcoded in the URL; it is unclear whether other loan IDs are supported
Citations
- —The x402 challenge returns maxAmountRequired of 20000 base units in USDC on Base networkhttps://lowpaymentfee.com/api/v1/loans/97/schedule
- —USDC contract address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/loans/97/schedule
- —Platform advertises $0.02 per request, no API keys, no rate limits, instant accesshttps://lowpaymentfee.com