Mortgage data endpoint on Base, pay-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/24`. It is part of a broader platform (lowpaymentfee.com) that offers a variety of pay-per-call 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/24` 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 mortgage data is returned or what parameters the POST body expects. The endpoint is live (returns a proper 402 challenge), but without documentation it is unclear what data fields are available or what input the endpoint requires.
Capabilities
Use cases
- —Retrieving mortgage-related data for financial analysis or comparison tools
- —Integrating mortgage information into automated agent workflows that can pay per call
- —Building real estate or lending dashboards with on-demand data
Fit
Best for
- —Agents or apps needing on-demand mortgage data without API key management
- —Developers experimenting with x402 pay-per-call protocols on Base
- —Low-volume consumers who prefer per-request pricing over subscriptions
Not for
- —Users who need detailed documentation or schema before integrating
- —High-volume mortgage data consumers who need bulk pricing or SLAs
- —Anyone without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/mortgages/24 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge with clear pricing, but there is no documentation, no OpenAPI schema, no request/response examples, and no description of what mortgage data is actually returned. The endpoint path '/mortgages/24' is not listed on the provider's homepage, making it unclear whether this is a production resource. Effectively a stub listing.
Warnings
- —No documentation available — docs, pricing, and API pages only show 'Connect wallet' with no content
- —No OpenAPI or schema describing request parameters or response format
- —The /api/v1/mortgages/24 endpoint is not listed among the provider's advertised APIs on the homepage
- —Unknown what 'mortgages/24' refers to — could be a specific mortgage record ID or a category; no way to verify without docs
Citations
- —The x402 challenge advertises maxAmountRequired of 20000 base units of USDC on Base networkhttps://lowpaymentfee.com/api/v1/mortgages/24
- —Platform pricing is $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/mortgages/24