Mortgage data endpoint on Base, pay-per-request via x402 with USDC.
What it does
This endpoint at `/api/v1/mortgages/16` is part of the lowpaymentfee.com platform, which offers a broad catalog of pay-per-call APIs settled via the x402 protocol on the Base network using USDC. The specific endpoint appears to serve mortgage-related data (resource ID 16), though the exact response schema and input parameters are not documented in the available crawl material. The platform advertises a uniform $0.02 per request pricing model across its endpoints, and the x402 challenge confirms a maxAmountRequired of 20,000 base units of USDC (0.02 USDC, i.e., $0.02) on Base.
The platform markets itself as requiring no API keys, no rate limits, and offering instant access. Payment is handled entirely through the x402 payment header using USDC on the Base L2 network. The endpoint is live and returns a proper 402 challenge when called without payment. However, documentation is extremely sparse — the docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no substantive content. There is no OpenAPI spec, no request/response schema, and no description of what mortgage data is returned or what parameters the POST body accepts. The endpoint's purpose must be inferred entirely from its URL path.
Capabilities
Use cases
- —Retrieving mortgage-related data for a specific record (ID 16)
- —Integrating mortgage information into financial dashboards or agent workflows
- —Programmatic access to mortgage data 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 financial data endpoints without signup
Not for
- —Users who need detailed documentation or guaranteed SLAs before integrating
- —Bulk mortgage data retrieval (no documented batch endpoints)
- —Users without USDC on the Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/mortgages/16 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, but there is no documentation, no OpenAPI spec, no request/response schema, and no description of what data is actually returned. The mortgage-specific purpose is inferred solely from the URL path. Docs pages are empty beyond a wallet connect prompt.
Warnings
- —No OpenAPI or schema documentation available for this endpoint
- —No description of request parameters or response format — purpose inferred from URL only
- —All documentation pages (docs, API, pricing, README) render only 'Connect wallet' with no content
- —The specific mortgage endpoint (/api/v1/mortgages/16) is not listed on the provider's homepage catalog, raising questions about its status
Citations
- —The endpoint returns a valid x402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/mortgages/16
- —The platform advertises $0.02 per request pricing with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base networkhttps://lowpaymentfee.com/api/v1/mortgages/16