Mortgage data API endpoint on Base, paid per-request via x402 with USDC.
What it does
This endpoint at lowpaymentfee.com provides access to mortgage-related data at the path `/api/v1/mortgages/61`. It is part of a broader platform (lowpaymentfee.com) that offers a variety of pay-per-request APIs spanning data analytics, AI/ML inference, finance, and utility services. All endpoints on the platform use the x402 payment protocol, settling in USDC on the Base network.
The specific endpoint `/api/v1/mortgages/61` is listed with the generic description "Premium API Access" and accepts POST requests. The x402 challenge indicates a maximum cost of 20,000 base units of USDC (0.02 USD per request, consistent with the platform's uniform $0.02/request pricing). Payment is made via the x402 exact scheme to the specified wallet address. No API keys or rate limits are advertised; access is granted immediately upon valid payment.
Documentation is extremely sparse. The `/docs`, `/api`, `/pricing`, and `/README` pages all render only a "Connect wallet" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no description of what mortgage data is returned or what parameters the POST body accepts. The endpoint path suggests it may return data for a specific mortgage record (ID 61), but this is purely inferred from the URL structure. Users should expect to experiment or contact the provider for details on the expected request format and response payload.
Capabilities
Use cases
- —Retrieving mortgage record data programmatically
- —Integrating mortgage information into financial dashboards
- —Agent-driven mortgage data lookups with automatic micropayments
Fit
Best for
- —Developers needing on-demand mortgage data without API key management
- —AI agents that can settle x402 payments on Base
- —Prototyping financial applications with low per-request costs
Not for
- —Users who need detailed API documentation before integrating
- —Bulk mortgage data retrieval (no batch endpoint documented)
- —Non-crypto users who cannot settle USDC payments on Base
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/mortgages/61 \
-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, no OpenAPI schema, no request/response examples, and no explanation of what data is returned. The mortgage-specific endpoint is not even listed on the provider's homepage. This is effectively a stub listing.
Warnings
- —No documentation available — /docs, /pricing, /api, and /README all show only 'Connect wallet'
- —No OpenAPI or schema describing request parameters or response format
- —The endpoint /api/v1/mortgages/61 is not listed among the provider's advertised APIs on the homepage
- —Purpose and data content of this specific endpoint are entirely unclear
Citations
- —Platform advertises $0.02 per request, no API keys, no rate limits, Base networkhttps://lowpaymentfee.com
- —x402 challenge returns maxAmountRequired of 20000 base units of USDC (USD Coin, 6 decimals = $0.02)https://lowpaymentfee.com/api/v1/mortgages/61
- —USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/mortgages/61