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/89`. It is part of a broader platform (lowpaymentfee.com) that offers dozens of pay-per-request 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 with no API keys, no rate limits, and no subscriptions required.
The specific endpoint `/api/v1/mortgages/89` is listed under the provider's umbrella as "Premium API Access." The x402 challenge confirms it is live and accepts POST requests. The maximum amount required is 20,000 base units of USDC (6 decimals), which equals $0.02 per request — consistent with the platform's uniform $0.02/request pricing across all endpoints. The endpoint returns JSON (`application/json`). However, no detailed documentation, request schema, or response schema is available for this particular mortgage endpoint, so the exact data fields it returns and the parameters it accepts are unknown.
The platform's landing page advertises key features: no API keys needed, no rate limits, instant access, and payment on the Base network. Documentation pages (`/docs`, `/pricing`, `/api`, `/README`) all appear to require a wallet connection and did not yield substantive content during crawling.
Capabilities
Use cases
- —Retrieving mortgage-related data for a specific record (ID 89)
- —Integrating mortgage information into financial analysis pipelines
- —Agent-driven lookups of mortgage data with automatic micropayment settlement
Fit
Best for
- —Developers needing on-demand mortgage data without subscription commitments
- —AI agents that can settle x402 micropayments on Base
- —Prototyping financial applications with low per-call costs
Not for
- —Bulk mortgage data downloads (no batch endpoint documented)
- —Users who need detailed API documentation or guaranteed SLAs before integrating
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/mortgages/89 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>"Endpoint
Quality
The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02/request in USDC on Base). However, there is no documentation for the mortgage endpoint specifically — no request schema, no response schema, no example payloads. The docs pages returned only wallet-connect prompts. The endpoint path includes a hardcoded ID (89), and it's unclear what data it returns or what parameters it accepts.
Warnings
- —No request or response schema available for /api/v1/mortgages/89
- —Documentation pages require wallet connection and yielded no content
- —The endpoint path contains a hardcoded ID (89); unclear if this is parameterizable
- —The mortgage endpoint is not listed on the provider's landing page among advertised APIs — its purpose and data content are unverified
Citations
- —The x402 challenge confirms the endpoint is live, accepts POST, and requires up to 20,000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/mortgages/89
- —The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/mortgages/89