Mortgage data endpoint on Base, pay-per-request via x402 with USDC.
What it does
This endpoint at `/api/v1/mortgages/39` is part of the lowpaymentfee.com platform, which offers a broad catalog of pay-per-call APIs settled via the x402 protocol on the Base network using USDC. The specific endpoint appears to serve mortgage-related data (resource ID 39), though the exact response schema and input parameters are not documented in the available crawl material. The endpoint is live and returns a valid x402 challenge on POST requests.
The platform advertises a flat $0.02 per request across its API catalog, and the x402 challenge for this endpoint shows a `maxAmountRequired` of 20,000 base units of USDC (6 decimals), which equals $0.02 USD — consistent with the site's stated pricing. Payment is made via the x402 exact scheme to a specified wallet address on Base. No API keys or rate limits are advertised; access is gated purely by micropayment.
Documentation is extremely sparse. The docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no additional content. There is no OpenAPI spec, no request/response schema, and no description of what mortgage data this endpoint actually returns. The endpoint's purpose must be inferred entirely from its URL path.
Capabilities
Use cases
- —Retrieving mortgage-related data for a specific resource (ID 39)
- —Integrating mortgage information into financial dashboards or agent workflows
- —Programmatic access to mortgage data without API key registration
Fit
Best for
- —Agents or developers needing on-demand mortgage data with no signup
- —x402-compatible clients on the Base network
- —Micropayment-gated data access without subscriptions
Not for
- —Users who need detailed documentation or guaranteed SLAs before integrating
- —Bulk mortgage data retrieval (pay-per-request model may not be cost-effective at scale)
- —Non-crypto users who cannot settle payments in USDC on Base
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/mortgages/39 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402_payment_token>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge with clear pricing ($0.02 USDC on Base). However, there is no documentation, no OpenAPI spec, no request/response schema, and no description of what mortgage data is actually returned. The endpoint's purpose is inferred solely from its URL path, making this effectively a stub listing.
Warnings
- —No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no content
- —No request or response schema provided; input parameters and output format are unknown
- —The specific meaning of 'mortgages/39' (resource ID? product type?) is undocumented
- —The platform lists many endpoint categories but this specific mortgage endpoint is not listed on the homepage catalog
Citations
- —The endpoint returns a valid x402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/mortgages/39
- —The platform advertises $0.02 per request with no API keys, no rate limits, and instant access on the Base networkhttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/mortgages/39