Mortgage data API 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/48`. 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/48` 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). This is consistent with the platform's stated flat pricing of $0.02 per request across all endpoints. No API keys are required; payment is handled inline via the X-PAYMENT header.
Documentation on the site is extremely sparse — the docs, pricing, API, and README pages all render only a "Connect wallet" prompt with no further content. The endpoint path suggests it returns data about a specific mortgage (ID 48), but there is no schema, field documentation, or example response available. The endpoint is live (402 challenge confirmed), but the lack of documentation makes it difficult to know exactly what data is returned or what POST body (if any) is expected.
Capabilities
Use cases
- —Retrieving mortgage data for a specific mortgage record (ID 48)
- —Integrating mortgage information into financial dashboards or agent workflows
- —Programmatic access to mortgage details without API key registration
Fit
Best for
- —Agents or apps needing on-demand mortgage data with crypto micropayments
- —Developers who want keyless, pay-per-call API access on Base
- —Quick prototyping against x402-gated financial endpoints
Not for
- —Users needing comprehensive mortgage market data across many records (only one ID exposed here)
- —Anyone requiring detailed API documentation or guaranteed SLAs
- —Non-crypto users who cannot pay via USDC on Base
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/mortgages/48 \
-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 ($0.02 USDC on Base). However, there is no documentation, no request/response schema, no examples, and the mortgage-specific endpoint path is not listed on the site's landing page. The purpose and data returned are entirely unclear beyond the path name.
Warnings
- —No documentation available — docs, pricing, API, and README pages all show only 'Connect wallet'
- —The endpoint /api/v1/mortgages/48 is not listed among the site's advertised APIs; its purpose and data schema are unknown
- —No request body schema or response schema provided; callers must guess at the expected input and output
- —This appears to be a finance/mortgage data endpoint — verify data accuracy and regulatory compliance before relying on it
Citations
- —The platform advertises $0.02 per 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/48
- —Docs, pricing, API, and README pages render only a 'Connect wallet' prompt with no substantive content.https://lowpaymentfee.com/docs