Mortgage data API endpoint on Base, paid per-request via x402 with USDC.
What it does
This endpoint at lowpaymentfee.com provides access to mortgage-related data at the path `/api/v1/mortgages/38`. It is part of a broader platform (lowpaymentfee.com) that offers dozens of pay-per-call API endpoints 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.
The specific endpoint `/api/v1/mortgages/38` accepts POST requests and returns JSON. The x402 challenge advertises 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 uniform $0.02/request pricing displayed on the landing page. Payment is made via the x402 "exact" scheme to the specified wallet address, with a 300-second timeout window.
Documentation is extremely sparse. The docs, API, pricing, and README 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 (e.g., whether ID 38 refers to a specific mortgage product, rate data, or calculation). The endpoint is confirmed live via the 402 challenge, but the actual payload structure and data content remain unknown.
Capabilities
Use cases
- —Retrieving mortgage-related data programmatically with per-call USDC payment
- —Integrating mortgage information into financial dashboards or agent workflows
- —Accessing on-demand mortgage data without API keys or subscriptions
Fit
Best for
- —Agents or apps needing on-demand mortgage data with crypto micropayments
- —Developers who want keyless, pay-per-use API access on Base
- —Quick one-off mortgage data lookups without subscription commitments
Not for
- —Users needing detailed documentation or well-defined schemas before integration
- —High-volume mortgage data consumers who need bulk pricing or rate limits guarantees
- —Anyone without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/mortgages/38 \
-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 USDC per request). However, there is no documentation, no OpenAPI schema, no request/response examples, and no explanation of what the mortgages/38 endpoint actually returns. This is effectively a stub listing.
Warnings
- —No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no content
- —No OpenAPI or schema definition for request or response payloads
- —Unknown what data the /api/v1/mortgages/38 endpoint actually returns
- —The endpoint path suggests a specific resource (ID 38) but no context is provided for what that ID represents
- —This endpoint is not listed on the provider's landing page among their advertised APIs
Citations
- —The endpoint returns a 402 challenge with x402Version 1, exact scheme, USDC on Base network, maxAmountRequired 20000https://lowpaymentfee.com/api/v1/mortgages/38
- —Platform pricing is $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/mortgages/38