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/75`. 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/75` accepts POST requests and returns JSON. The x402 challenge advertises a maximum cost of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 per request (USDC uses 6 decimals). The platform's landing page confirms a flat $0.02/request pricing model across all endpoints, with no API keys, no rate limits, and no minimum commitments required.
Documentation is extremely sparse — the docs, pricing, and API pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no description of what the mortgages endpoint actually returns. The endpoint name suggests mortgage financial data (possibly a specific mortgage record identified by ID 75), but the exact payload structure and fields are unknown. The endpoint is confirmed live via a valid 402 challenge.
Capabilities
Use cases
- —Retrieving mortgage-related financial data on demand
- —Integrating mortgage information into financial dashboards or agent workflows
- —Programmatic access to mortgage records without API key management
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 with no signup or rate-limit friction
Not for
- —Users who need detailed documentation or schema guarantees before integrating
- —High-volume consumers who prefer subscription-based pricing
- —Anyone requiring fiat-only payment rails
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/mortgages/75 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is confirmed live via a valid x402 402 challenge, and pricing is clear ($0.02/request in USDC on Base). However, there is no documentation, no OpenAPI schema, no request/response examples, and no description of what the mortgages endpoint actually returns. The docs pages are empty. This is effectively a stub listing.
Warnings
- —No documentation available — docs, pricing, and API pages all show only 'Connect wallet' with no content.
- —No OpenAPI or request/response schema provided; the exact data returned by /api/v1/mortgages/75 is unknown.
- —The endpoint path suggests a specific mortgage record (ID 75) but it is unclear whether this is a fixed resource or parameterized.
- —The mortgages endpoint is not listed on the provider's own landing page among available APIs, raising questions about its status.
Citations
- —The endpoint returns a 402 challenge with x402Version 1, accepting USDC on Base with maxAmountRequired of 20000 base units ($0.02).https://lowpaymentfee.com/api/v1/mortgages/75
- —The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on the Base network.https://lowpaymentfee.com
- —USDC contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913.https://lowpaymentfee.com/api/v1/mortgages/75