Mortgage data endpoint on Base, pay-per-call via x402 with USDC.
What it does
This endpoint at `/api/v1/mortgages/34` is part of the lowpaymentfee.com platform, which offers a broad catalog of pay-per-request APIs settled via the x402 protocol on the Base network using USDC. The specific endpoint appears to serve mortgage-related data (resource ID 34), though the exact response schema and input parameters are not documented in the available crawl material. The platform advertises a flat $0.02 per request across its API catalog, and the x402 challenge for this endpoint confirms a maxAmountRequired of 20,000 base units of USDC (0.02 USDC, i.e., $0.02) on Base.
The provider's landing page lists endpoints across data & analytics, AI/ML, finance & Web3, and infrastructure categories, all at the same $0.02 price point. The mortgage endpoint is not listed on the homepage, suggesting it may be a less-promoted or specialized resource. No OpenAPI spec, detailed documentation, or example responses were found — the docs, pricing, and README pages all returned only a "Connect wallet" prompt with no substantive content.
The endpoint is live and returns a valid x402 402 challenge when called via POST. Payment is settled in USDC (contract 0x8335…2913) on Base to address 0x1A2B…85F3. No API keys or rate limits are advertised. Because there is no documentation on what this endpoint actually returns or what POST body it expects, agents should treat this as an exploratory integration until more details surface.
Capabilities
Use cases
- —Retrieving mortgage-related data for a specific resource ID
- —Integrating mortgage information into financial dashboards or agent workflows
- —Programmatic access to mortgage data without API key management
Fit
Best for
- —Agents needing on-demand mortgage data with crypto micropayments
- —Developers exploring x402 pay-per-call patterns on Base
- —Applications that want keyless, pay-as-you-go API access
Not for
- —Users who need comprehensive mortgage documentation or schema guarantees before integrating
- —High-volume batch mortgage data retrieval (no documented bulk endpoints)
- —Users without USDC on Base for payment
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/mortgages/34 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, but there is zero documentation on request/response schema, no OpenAPI spec, and the mortgage endpoint is not even listed on the provider's homepage. The docs/pricing/README pages are all empty beyond a wallet connect prompt. Effectively a stub listing.
Warnings
- —No documentation available for this specific endpoint — request body and response schema are unknown
- —Mortgage endpoint not listed on the provider's homepage; may be experimental or undocumented
- —All docs, pricing, and README pages returned only 'Connect wallet' with no content
- —No OpenAPI or schema definition found anywhere on the site
Citations
- —The endpoint returns a valid x402 402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/mortgages/34
- —USDC contract address on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/mortgages/34
- —Platform advertises $0.02 per request, no API keys, no rate limits, instant access on Base networkhttps://lowpaymentfee.com
- —The mortgage endpoint is not listed among the available APIs on the homepagehttps://lowpaymentfee.com