Mortgage data API endpoint on Base, pay-per-call via x402 with USDC.
What it does
This endpoint at lowpaymentfee.com provides mortgage-related data via a POST request to `/api/v1/mortgages/80`. 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 gated by the x402 payment protocol on the Base network.
The `/api/v1/mortgages/80` endpoint accepts POST requests and returns JSON. Payment is settled in USDC on Base (contract `0x8335…2913`). The x402 challenge advertises a `maxAmountRequired` of 20,000 base units; since USDC uses 6 decimals, this equals $0.02 per request — consistent with the site's uniform $0.02/request pricing across all endpoints. No API keys or rate limits are required; access is instant once payment is attached.
Documentation beyond the landing page 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 `80` path parameter represents (it could be a loan term, LTV ratio, or other mortgage parameter). The exact request body format and response structure are unknown. Users should expect to experiment or contact the provider for details.
Capabilities
Use cases
- —Fetching mortgage-related data or calculations programmatically
- —Integrating mortgage information into financial dashboards or agent workflows
- —Paying per-request for mortgage data without subscription commitments
Fit
Best for
- —Developers needing on-demand mortgage data without API key management
- —AI agents that can settle x402 payments on Base
- —Projects requiring low-cost, pay-as-you-go financial data endpoints
Not for
- —Users who need comprehensive mortgage documentation or guaranteed SLA
- —Anyone unable to pay with USDC on the Base network
- —Applications requiring bulk/batch mortgage data retrieval at scale
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/mortgages/80 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>" \
-d '{}'Endpoint
Quality
The endpoint is live (402 challenge captured) and pricing is clear ($0.02/request in USDC on Base), but there is no documentation, no OpenAPI schema, no request/response examples, and no explanation of what the endpoint actually returns or what the path parameter '80' means. Effectively a stub listing.
Warnings
- —No documentation available — /docs, /pricing, /api, and /README all show only 'Connect wallet' with no content
- —No OpenAPI or request/response schema provided; request body format and response structure are completely unknown
- —The meaning of the path parameter '80' in /api/v1/mortgages/80 is undocumented
- —The 'Premium API Access' description is generic and shared across all endpoints on the platform
Citations
- —The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units in USDC on Basehttps://lowpaymentfee.com/api/v1/mortgages/80
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/mortgages/80
- —Platform-wide pricing is $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —Documentation pages (/docs, /pricing, /api, /README) render only a 'Connect wallet' prompthttps://lowpaymentfee.com/docs