Mortgage data endpoint on Base, pay-per-call with USDC via x402.
What it does
This endpoint at lowpaymentfee.com provides access to mortgage-related data at the path `/api/v1/mortgages/93`. 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/93` 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 uniform $0.02/request pricing displayed on its landing page. Payment is settled on-chain to the address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3, with a maximum timeout of 300 seconds.
The platform advertises no API keys, no rate limits, and instant access. Documentation pages (/docs, /pricing, /README) were largely empty during crawl, showing only a "Connect wallet" prompt, so the exact request body schema and response format for the mortgages endpoint are unknown. The resource ID "93" in the path suggests this may return data for a specific mortgage record or calculation, but this is speculative given the lack of documentation.
Capabilities
Use cases
- —Retrieving mortgage record or calculation data on a per-call basis
- —Integrating mortgage information into agent workflows without API key management
- —Paying for financial data access with USDC on Base L2
Fit
Best for
- —Agents or apps needing on-demand mortgage data with crypto micropayments
- —Developers who want keyless, pay-per-use financial API access
- —x402-compatible clients on the Base network
Not for
- —Users who need detailed API documentation before integrating
- —Bulk mortgage data retrieval at scale (no documented batch endpoints)
- —Users without USDC on Base or an x402-compatible payment client
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/mortgages/93 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402_payment_header>"Endpoint
Quality
The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02/request in USDC on Base). However, there is no documentation for the mortgages endpoint — no request schema, no response schema, no examples. The docs, pricing, and README pages returned only a wallet-connect prompt. The endpoint path and description ('Premium API Access') give minimal insight into what data is actually returned.
Warnings
- —No documentation available for /api/v1/mortgages/93 — request body and response format are completely unknown.
- —The /docs, /pricing, and /README pages are effectively empty (only show 'Connect wallet').
- —The endpoint name 'Premium API Access' is generic and does not describe the actual data returned.
- —The mortgages endpoint is not listed on the landing page among the advertised APIs, raising questions about its status.
Citations
- —The x402 challenge returns maxAmountRequired of 20000 base units of USDC (USD Coin) on Base network.https://lowpaymentfee.com/api/v1/mortgages/93
- —The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base network.https://lowpaymentfee.com
- —USDC contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 with 6 decimals.https://lowpaymentfee.com/api/v1/mortgages/93