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 via a pay-per-request x402 protocol. The specific resource `/api/v1/mortgages/86` accepts POST requests and returns JSON. Payment is settled on the Base network using USDC (USD Coin) at a cost of $0.02 per request (20,000 base units with 6 decimals).
The broader lowpaymentfee.com platform hosts a variety of x402-gated API endpoints spanning data analytics, AI/ML inference, finance, crypto, and utility services — all priced uniformly at $0.02 per request. The platform advertises no API keys, no rate limits, and instant access; callers simply attach an x402 payment header to each request.
Documentation 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/86` endpoint actually returns or what input it expects. The endpoint is confirmed live (returns a proper 402 challenge), but the exact data model and use case for this mortgage resource are unknown.
Capabilities
Use cases
- —Retrieving mortgage-related data for a specific record (ID 86)
- —Integrating mortgage information into financial applications via pay-per-call
- —Agent-driven lookups of mortgage details without API key management
Fit
Best for
- —Developers needing on-demand mortgage data without subscription commitments
- —AI agents that can settle x402 payments on Base with USDC
- —Applications requiring keyless, pay-as-you-go API access
Not for
- —Users who need comprehensive mortgage documentation or schema before integrating
- —Bulk mortgage data retrieval (pay-per-request model may be costly at scale)
- —Anyone unable to transact USDC on the Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/mortgages/86 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is confirmed live with a valid 402 challenge, but there is no documentation, no OpenAPI schema, no request/response examples, and no description of what the mortgage endpoint actually returns. The listing is effectively a stub with only pricing and liveness confirmed.
Warnings
- —No documentation available — docs, pricing, API, and README pages all show only 'Connect wallet' with no content.
- —No OpenAPI or input/output schema provided; request body format and response structure are completely unknown.
- —The specific purpose of /api/v1/mortgages/86 (what data it returns, what ID 86 represents) is undocumented.
- —The broader platform lists many endpoint categories but none specifically mention mortgages, suggesting this may be a test or placeholder resource.
Citations
- —Endpoint returns a 402 challenge with x402Version 1, accepting USDC on Base network with maxAmountRequired of 20000 base unitshttps://lowpaymentfee.com/api/v1/mortgages/86
- —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/86