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 at the path `/api/v1/mortgages/28`. It is part of a broader platform (lowpaymentfee.com) that offers dozens of pay-per-call API endpoints spanning data analytics, AI/ML inference, finance, crypto, and utility services — all settled via the x402 protocol on the Base network using USDC.
The specific endpoint `/api/v1/mortgages/28` is listed under the title "Premium API Access" and accepts POST requests. The x402 challenge indicates a maximum cost of 20,000 base units of USDC (0.02 USD per request, consistent with the site's uniform $0.02/request pricing). Payment is made on-chain to the specified wallet address, with no API keys or rate limits required. The asset used is USDC on Base (contract 0x8335…2913).
Documentation on the site is extremely sparse — the docs, pricing, API, and README pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no description of what the `/api/v1/mortgages/28` endpoint actually returns beyond its generic title. The `28` in the path suggests it may reference a specific mortgage record or calculation, but this is unconfirmed. Users should expect to experiment with POST payloads to discover the endpoint's behavior.
Capabilities
Use cases
- —Retrieving mortgage-related data or calculations via a single paid API call
- —Integrating mortgage information into agent workflows that can settle payments on Base
- —Programmatic access to mortgage records without traditional API key management
Fit
Best for
- —Agents or applications that can settle x402 payments in USDC on Base
- —Developers needing on-demand mortgage data without subscription commitments
- —Automated pipelines requiring pay-per-use financial data endpoints
Not for
- —Users who need detailed documentation or well-defined schemas before integrating
- —Applications requiring free or subscription-based mortgage data access
- —High-volume consumers who would benefit from bulk pricing
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/mortgages/28 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>" \
-d '{}'Endpoint
Quality
The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02/request in USDC on Base), but there is no documentation, no request/response schema, no examples, and no description of what the mortgage endpoint actually returns. This is effectively a stub listing.
Warnings
- —No documentation available — docs, pricing, API, and README pages all show only 'Connect wallet' with no content
- —No OpenAPI or output schema describing request parameters or response format
- —The purpose of '/api/v1/mortgages/28' is unknown — the '28' path segment is unexplained
- —This endpoint is not listed on the provider's homepage among their advertised APIs, raising questions about its status
Citations
- —The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/mortgages/28
- —The platform advertises uniform $0.02/request pricing 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/28