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/70`. It is part of a broader platform (lowpaymentfee.com) that offers dozens 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/70` 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). This is consistent with the site's stated flat pricing of $0.02 per request across all endpoints. No API keys are required; payment is handled inline via the X-PAYMENT header per the x402 protocol.
Documentation on the site is extremely sparse — the docs, pricing, API, and README pages all render only a "Connect wallet" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no description of what the `/api/v1/mortgages/70` endpoint actually returns beyond the generic label "Premium API Access." The `70` in the path likely refers to a specific mortgage record or configuration parameter, but this is not documented. Users should expect to experiment or contact the provider for details on the request body format and response structure.
Capabilities
Use cases
- —Retrieving mortgage-related data or calculations on a per-request basis
- —Integrating mortgage information into agent workflows without managing API keys
- —Programmatic access to mortgage records settled via crypto micropayments
Fit
Best for
- —Developers or agents needing on-demand mortgage data with no subscription
- —x402-compatible agents that can pay per call with USDC on Base
- —Prototyping financial applications that need mortgage endpoints
Not for
- —Users who need detailed documentation or guaranteed SLA before integrating
- —Bulk mortgage data retrieval (pay-per-request at $0.02 adds up at scale)
- —Anyone unable to transact USDC on the Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/mortgages/70 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>" \
-d '{}'Endpoint
Quality
The endpoint is live (returns a valid x402 402 challenge) and pricing is clear at $0.02/request in USDC on Base. However, there is no documentation, no OpenAPI schema, no request/response examples, and the purpose of the specific /mortgages/70 path is entirely undocumented. This is effectively a stub listing.
Warnings
- —No documentation available — docs, pricing, API, and README pages all show only 'Connect wallet' with no content
- —No OpenAPI or request/response schema provided; request body format is unknown
- —The meaning of '/mortgages/70' (the '70' parameter) is undocumented
- —The endpoint is labeled generically as 'Premium API Access' with no mortgage-specific description from the provider
Citations
- —The endpoint returns a valid x402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/mortgages/70
- —The platform advertises $0.02 per request flat pricing with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 with 6 decimalshttps://lowpaymentfee.com/api/v1/mortgages/70