Mortgage data API 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/50`. It is part of a broader platform offering dozens of pay-per-request APIs spanning data analytics, AI/ML inference, finance, crypto, and utility services. All endpoints use the x402 payment protocol, settling in USDC on the Base network with no API keys, no rate limits, and no subscriptions required.
The specific endpoint `/api/v1/mortgages/50` is listed under "Premium API Access" and accepts POST requests. The x402 challenge indicates a maximum cost of 20,000 base units of USDC (0.02 USD per request, since USDC uses 6 decimals). This matches the platform's advertised flat pricing of $0.02 per request across all endpoints. Payment is made via the x402 `exact` scheme to the specified wallet address on Base.
Documentation is extremely sparse — the docs, pricing, API, and README pages all resolve to a minimal "Connect wallet" prompt with no further technical detail. There is no OpenAPI schema, no request/response examples, and no description of what mortgage data is returned or what parameters the POST body accepts. The endpoint is confirmed live (returns a proper 402 challenge), but without documentation it is unclear what data fields are available or what input the endpoint expects.
Capabilities
Use cases
- —Retrieving mortgage-related data or calculations programmatically
- —Integrating mortgage information into financial dashboards or apps
- —Agent-driven mortgage data lookups with micropayment settlement
Fit
Best for
- —Developers needing on-demand mortgage data without subscriptions
- —AI agents that can settle x402 payments in USDC on Base
- —Applications requiring pay-per-call financial data with no rate limits
Not for
- —Users who need detailed API documentation before integrating
- —Bulk data consumers who need flat-rate or subscription pricing
- —Anyone unable to transact in USDC on the Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/mortgages/50 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge with clear pricing, but there is zero documentation on request parameters, response schema, or what 'mortgages/50' actually returns. No OpenAPI spec, no examples, and all doc pages are empty. This is effectively a stub listing.
Warnings
- —No API documentation available — docs, pricing, API, and README pages all show only 'Connect wallet' with no technical content.
- —No request or response schema provided; it is unknown what POST body the endpoint expects or what data it returns.
- —The endpoint path '/api/v1/mortgages/50' is not listed on the provider's homepage among their advertised APIs, raising questions about its status.
- —No OpenAPI or ai-plugin manifest found.
Citations
- —The platform advertises $0.02 per request flat pricing with no API keys, no rate limits, and instant access on Base network.https://lowpaymentfee.com
- —The x402 challenge shows maxAmountRequired of 20000 base units of USDC (USD Coin) on Base network with exact scheme.https://lowpaymentfee.com/api/v1/mortgages/50
- —The endpoint accepts POST requests and returns application/json.https://lowpaymentfee.com/api/v1/mortgages/50
- —Docs, pricing, API, and README pages resolve to minimal 'Connect wallet' content with no technical documentation.https://lowpaymentfee.com/docs