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/55`. 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/55` is listed as "Premium API Access" and accepts POST requests. The x402 challenge indicates a maximum cost of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 per request (USDC uses 6 decimals). Payment is settled on-chain to the provider's wallet. No API keys or rate limits are advertised; access is granted immediately upon valid x402 payment.
Documentation is extremely sparse. The crawled docs, pricing, and API pages all returned only a "Connect wallet" prompt with no further technical detail. There is no OpenAPI spec, no request/response schema, and no description of what mortgage data is returned. The endpoint path suggests it may return data for a specific mortgage record (ID 55), but this is inference only. The platform's landing page confirms the $0.02/request pricing model and Base network settlement.
Capabilities
Use cases
- —Retrieving mortgage record data programmatically with per-call payment
- —Integrating mortgage information into financial dashboards or agent workflows
- —Querying specific mortgage details without subscription or API key management
Fit
Best for
- —Agents or apps needing on-demand mortgage data with crypto micropayments
- —Developers who want keyless, pay-as-you-go API access on Base
- —Workflows requiring single-call financial data without rate limits
Not for
- —Users who need detailed documentation or well-defined response schemas before integrating
- —Bulk mortgage data retrieval at scale (no batch endpoint documented)
- —Users who cannot pay with USDC on the Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/mortgages/55 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live (402 challenge captured) and pricing is clear ($0.02/request in USDC on Base). However, there is no OpenAPI spec, no request/response schema, no documentation beyond a wallet-connect prompt, and the purpose of the specific /mortgages/55 path is entirely unclear. This is effectively a stub listing.
Warnings
- —No documentation available — docs, pricing, and API pages all return only 'Connect wallet'
- —No OpenAPI or request/response schema provided
- —The endpoint path '/api/v1/mortgages/55' is not listed on the provider's landing page among advertised APIs, raising questions about its purpose and availability
- —No examples of request body or response format exist in crawled material
Citations
- —The x402 challenge returns maxAmountRequired of 20000 base units of USDC on Base, equaling $0.02 per requesthttps://lowpaymentfee.com/api/v1/mortgages/55
- —The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on the Base networkhttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/mortgages/55