Mortgage data endpoint on Base, pay-per-request via x402 with USDC.
What it does
This endpoint at `/api/v1/mortgages/59` 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 59), 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 (6 decimals), which equals $0.02.
The platform markets itself as requiring no API keys, no rate limits, and no commitments — callers simply attach an x402 payment header with each request. The endpoint accepts POST requests and returns application/json. 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 should contain. The mortgage endpoint specifically is not listed on the homepage's catalog of available APIs, which raises questions about whether it is a production endpoint or a test/placeholder resource.
Because of the lack of documentation on request format, response structure, and the absence of this specific endpoint from the site's own catalog, consumers should treat this as an experimental or undocumented endpoint. The x402 challenge is live and well-formed, confirming the endpoint is operational at the protocol level.
Capabilities
Use cases
- —Retrieving mortgage-related data for a specific resource ID
- —Integrating mortgage information into financial dashboards
- —Agent-driven lookups of mortgage records with per-call crypto payment
Fit
Best for
- —Developers wanting keyless, pay-per-call mortgage data access
- —AI agents that can settle x402 payments on Base
- —Prototyping financial data integrations without subscription commitments
Not for
- —Production use requiring documented request/response schemas
- —Bulk mortgage data retrieval (no documented batch support)
- —Users who cannot transact in USDC on the Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/mortgages/59 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>"Endpoint
Quality
The x402 challenge is live and well-formed, confirming the endpoint works at the protocol level. However, there is zero documentation on request parameters, response schema, or what 'mortgages/59' actually returns. The endpoint is not listed in the site's own catalog, and all doc pages are empty. This is effectively a stub listing.
Warnings
- —No documentation available for this specific endpoint — request body format and response schema are unknown.
- —This endpoint (/api/v1/mortgages/59) is not listed in the provider's own homepage catalog of available APIs.
- —All documentation pages (docs, API, pricing, README) render only a 'Connect wallet' prompt with no content.
- —Response schema and input parameters are entirely undocumented; callers must experiment to discover the API contract.
Citations
- —The platform advertises $0.02 per request 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/59
- —The mortgage endpoint is not listed among the homepage's catalog of available APIs.https://lowpaymentfee.com