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 via a pay-per-request x402 protocol. The specific resource `/api/v1/mortgages/5` is accessed via HTTP POST and returns JSON. Payment is settled on the Base network using USDC (USD Coin) at a cost of $0.02 per request (20,000 base units with 6 decimals). No API keys or rate limits are required; callers simply attach an X-PAYMENT header with a valid x402 payment proof.
The broader lowpaymentfee.com platform hosts a variety of x402-gated endpoints spanning data & analytics, AI/ML inference, finance & Web3, and infrastructure utilities — all priced uniformly at $0.02 per request. However, the `/api/v1/mortgages/5` path is not listed on the site's landing page among the advertised API categories, so its exact response schema and data content are unclear. The endpoint is live and returns a proper 402 challenge, confirming it is operational.
Because no OpenAPI schema, documentation, or example responses are available for this specific mortgage endpoint, the precise fields returned are unknown. Callers should expect a JSON payload related to mortgage data (possibly a specific mortgage record identified by ID 5), but the structure must be discovered empirically.
Capabilities
Use cases
- —Retrieving mortgage record data programmatically with per-call payment
- —Integrating mortgage information into financial analysis pipelines
- —Agent-driven lookup of mortgage details without pre-registration
Fit
Best for
- —Developers needing on-demand mortgage data without subscription commitments
- —AI agents that can settle x402 payments on Base with USDC
- —Applications requiring pay-as-you-go access to financial records
Not for
- —Bulk mortgage data downloads (pay-per-request model may be costly at scale)
- —Users who cannot transact on the Base L2 network with USDC
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/mortgages/5 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-proof>"Endpoint
Quality
The endpoint is live and returns a valid 402 challenge, but there is no documentation, no OpenAPI schema, no example responses, and the /mortgages/5 path is not listed among the site's advertised APIs. The actual data returned is entirely unknown, making this effectively a stub listing.
Warnings
- —The /api/v1/mortgages/5 endpoint is not listed among the provider's advertised APIs on the landing page — it may be undocumented or experimental.
- —No response schema or example output is available; the data structure must be discovered by making a paid request.
- —Documentation pages (/docs, /api, /pricing, /README) all returned only a 'Connect wallet' prompt with no substantive content.
- —Mortgage data may be subject to financial data regulations depending on jurisdiction and content.
Citations
- —Endpoint returns 402 with x402 challenge on POST, confirming it is livehttps://lowpaymentfee.com/api/v1/mortgages/5
- —Payment is 20,000 base units of USDC on Base network (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913)https://lowpaymentfee.com/api/v1/mortgages/5
- —Platform advertises $0.02 per request, no API keys, no rate limits, Base networkhttps://lowpaymentfee.com
- —The /api/v1/mortgages/5 path is not listed among the site's advertised API categorieshttps://lowpaymentfee.com