Mortgage data endpoint on Base, pay-per-call via x402 with USDC.
What it does
This endpoint at lowpaymentfee.com provides access to mortgage-related data at the path `/api/v1/mortgages/71`. 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, crypto, and utility services — all gated via the x402 payment protocol on the Base network using USDC.
The specific endpoint `/api/v1/mortgages/71` 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). The platform's landing page confirms a flat $0.02/request pricing model across all endpoints, with no API keys, no rate limits, and no minimum commitments required.
Documentation is extremely sparse — the docs, pricing, and API pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no description of what the mortgages endpoint actually returns. The endpoint path suggests it retrieves or processes data related to a specific mortgage record (ID 71), but the exact input parameters and output fields are unknown. The platform appears to be a demonstration or early-stage x402 payment gateway rather than a mature, well-documented API provider.
Capabilities
Use cases
- —Retrieving mortgage record data via a single pay-per-call request
- —Integrating mortgage information into agent workflows without API key management
- —Programmatic access to mortgage details settled on Base L2 with USDC
Fit
Best for
- —Developers experimenting with x402 pay-per-call protocols
- —Agents needing keyless, on-demand mortgage data access
- —Projects already operating on the Base network with USDC
Not for
- —Production use cases requiring documented request/response schemas
- —Bulk mortgage data retrieval or batch processing
- —Users who need detailed API documentation before integrating
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/mortgages/71 \
-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), but there is no documentation, no OpenAPI schema, no request/response examples, and no explanation of what the mortgages endpoint actually returns. This is effectively a stub listing.
Warnings
- —No API documentation available — docs, pricing, and API pages all render only 'Connect wallet'
- —No OpenAPI or JSON schema describing request parameters or response format
- —The specific purpose and data returned by /api/v1/mortgages/71 is unknown
- —The platform appears to be early-stage or a demonstration; reliability is unverified
- —The mortgages endpoint is not listed on the provider's own landing page among available APIs
Citations
- —The platform advertises $0.02/request flat pricing with no API keys, no rate limits, and instant access on the Base network.https://lowpaymentfee.com
- —The x402 challenge returns maxAmountRequired of 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base.https://lowpaymentfee.com/api/v1/mortgages/71
- —Docs, pricing, API, and README pages render only a 'Connect wallet' prompt with no substantive content.https://lowpaymentfee.com/docs