Mortgage data endpoint on Base, paid per-request via x402 with USDC.
What it does
This endpoint at lowpaymentfee.com provides access to mortgage-related data (specifically resource ID 43) via the x402 payment protocol. The endpoint is live and returns a 402 challenge requiring payment in USDC on the Base network. The maximum amount required per request is 20,000 base units of USDC (6 decimals), which equals $0.02 USD per call.
The provider lowpaymentfee.com hosts a broad catalog of pay-per-request APIs spanning data analytics, AI/ML inference, finance, crypto, and utility services — all priced at $0.02 per request with no API keys, no rate limits, and no minimum commitments. However, the specific mortgage endpoint (/api/v1/mortgages/43) is not listed on the provider's landing page among the advertised API categories, so its exact response schema and data content are unclear. The endpoint accepts POST requests and returns application/json.
Payment is settled on the Base L2 network using USDC (contract 0x8335…2913) to address 0x1A2B…85F3, with a maximum timeout of 300 seconds. No OpenAPI schema, detailed documentation, or example responses were found in the crawl. The docs, pricing, and API pages all rendered only a "Connect wallet" prompt with no additional content.
Capabilities
Use cases
- —Retrieving mortgage data for a specific mortgage record (ID 43)
- —Integrating mortgage information into financial analysis pipelines
- —Agent-driven lookups of mortgage details with micropayments
Fit
Best for
- —Agents needing on-demand mortgage data without API key management
- —Developers experimenting with x402 pay-per-request protocols
- —Low-volume, pay-as-you-go mortgage data access
Not for
- —Bulk mortgage data downloads or batch processing (no documented bulk endpoints)
- —Users who need detailed documentation or guaranteed SLAs before integrating
- —Non-crypto users who cannot pay via USDC on Base
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/mortgages/43 \
-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 USDC on Base), but there is no documentation, no OpenAPI schema, no example request/response, and the specific mortgage endpoint is not even listed on the provider's own landing page. The crawled docs/pricing/API pages were empty beyond a wallet connect prompt. Effectively a stub listing.
Warnings
- —The /api/v1/mortgages/43 endpoint is not listed among the provider's advertised APIs on the landing page — its purpose and data content are unverified.
- —No OpenAPI schema, request body schema, or response schema available.
- —All documentation pages (docs, pricing, API, README) returned only a 'Connect wallet' prompt with no substantive content.
- —The specific data returned by this mortgage endpoint is unknown; 'mortgages/43' could be a single static record or a parameterized resource.
Citations
- —The endpoint returns a 402 challenge requiring USDC payment on Base with maxAmountRequired of 20000 base unitshttps://lowpaymentfee.com/api/v1/mortgages/43
- —USDC contract address on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/mortgages/43
- —Provider advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —The mortgage endpoint is not listed among the provider's advertised API categorieshttps://lowpaymentfee.com