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 (resource ID 23) via the x402 payment protocol. It accepts POST requests and returns JSON. Payment is settled on the Base network using USDC (contract 0x8335…2913) with a maximum cost of $0.02 per request (20,000 base units at 6 decimals).
The parent site lowpaymentfee.com hosts a broad catalog of pay-per-call APIs spanning data analytics, AI/ML inference, finance, crypto, and utility services — all priced at $0.02 per request with no API keys, no rate limits, and no commitments. However, the specific `/api/v1/mortgages/23` endpoint is not listed on the site's landing page among the advertised APIs, and no documentation, request schema, or response schema is available for it. The docs, pricing, and README pages all resolve to a minimal "Connect wallet" prompt with no further content.
Because there is no documentation describing what mortgage data this endpoint returns, what POST body it expects, or what the response looks like, consumers should treat this as an opaque endpoint. The x402 challenge confirms it is live and accepting payment-gated requests, but the lack of any schema or example makes integration speculative.
Capabilities
Use cases
- —Retrieving mortgage-related data for a specific resource (ID 23)
- —Programmatic access to mortgage information without API key management
- —Agent-driven financial data retrieval with micropayments
Fit
Best for
- —Developers experimenting with x402 pay-per-call protocols
- —Agents needing on-demand mortgage data with crypto micropayments
- —Projects already operating on the Base L2 network with USDC
Not for
- —Users who need documented request/response schemas before integrating
- —Bulk mortgage data retrieval (no batch endpoint documented)
- —Users without USDC on Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/mortgages/23 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>"Endpoint
Quality
The x402 challenge is live and confirms pricing and network details, but there is zero documentation for this specific endpoint — no request schema, no response schema, no examples, and the endpoint isn't even listed on the provider's own landing page. Effectively a stub.
Warnings
- —No documentation exists for /api/v1/mortgages/23 — it is not listed among the provider's advertised APIs
- —No request body schema or response schema available; integration requires guesswork
- —Docs, pricing, and README pages all render only a 'Connect wallet' prompt with no useful content
- —The endpoint path suggests a single resource (ID 23) with no explanation of what that resource represents
Citations
- —The x402 challenge returns 402 with maxAmountRequired of 20000 in USDC on Base networkhttps://lowpaymentfee.com/api/v1/mortgages/23
- —The site advertises $0.02 per request, no API keys, no rate limits, instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/mortgages/23
- —Docs, pricing, and README pages show only 'Connect wallet' with no further contenthttps://lowpaymentfee.com/docs