Mortgage data endpoint on Base, pay-per-call with USDC via x402 protocol.
What it does
This endpoint at lowpaymentfee.com provides access to mortgage-related data at the path `/api/v1/mortgages/14`. 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/14` is not listed on the site's main landing page among the advertised API categories, so its exact response schema and data content are unclear. The x402 challenge confirms it is live and accepts POST requests. The price is 20,000 base units of USDC (6 decimals), which equals $0.02 per request — consistent with the platform's uniform $0.02/request pricing. Payment is settled on-chain on Base to address `0x1A2B...85F3` using the USDC contract `0x8335...2913`.
The platform advertises no API keys, no rate limits, and instant access. Documentation pages (`/docs`, `/pricing`, `/README`) returned only a "Connect wallet" prompt with no substantive content during the crawl, so detailed request/response schemas are unavailable. The endpoint's purpose — whether it returns a specific mortgage record, mortgage rate data, or calculation results — must be inferred from the URL path alone.
Capabilities
Use cases
- —Retrieving mortgage-related data or calculations on demand
- —Integrating mortgage information into financial dashboards or agent workflows
- —Paying per-request for mortgage data without subscription commitments
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
- —Prototyping financial tools without upfront API subscription costs
Not for
- —Users who need detailed documentation or guaranteed response schemas before integrating
- —High-volume consumers who would benefit from bulk pricing or subscriptions
- —Anyone unable to pay with USDC on the Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/mortgages/14 \
-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). However, this specific mortgage endpoint is not listed on the site's landing page, no documentation or response schema is available, and the crawled doc/pricing/README pages were empty. The purpose and data returned are entirely inferred from the URL path.
Warnings
- —Endpoint /api/v1/mortgages/14 is not listed among the site's advertised APIs — its availability and data content are unverified beyond the 402 challenge.
- —All documentation pages (/docs, /pricing, /README) returned only a 'Connect wallet' prompt with no usable content.
- —No request or response schema is available; the exact data returned is unknown.
Citations
- —Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base network.https://lowpaymentfee.com
- —x402 challenge confirms the endpoint is live, accepts POST, and charges 20000 base units of USDC (=$0.02) on Base.https://lowpaymentfee.com/api/v1/mortgages/14