Pay-per-call loan data endpoint on Base via x402, settled in USDC at $0.02/request.
What it does
This endpoint at `/api/v1/loans/67` is part of the lowpaymentfee.com platform, which offers a variety of pay-per-request APIs spanning data & analytics, AI/ML inference, finance/Web3, and infrastructure utilities. All endpoints use the x402 payment protocol, settling in USDC on the Base network. The specific resource at `/api/v1/loans/67` is labeled "Premium API Access" and accepts POST requests. Its x402 challenge advertises a maxAmountRequired of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 per request (USDC uses 6 decimals).
The broader platform advertises a flat $0.02/request pricing model with no API keys, no rate limits, no minimums, and instant access. However, documentation is extremely sparse — the docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no description of what data the `/api/v1/loans/67` endpoint actually returns. The endpoint name suggests loan-related financial data, but the exact payload structure is unknown.
Because there is no schema, no documentation, and no example responses, agents calling this endpoint will need to discover the response format empirically. The endpoint is confirmed live (returns a valid 402 challenge), but the lack of any documentation significantly limits its usability.
Capabilities
Use cases
- —Retrieving loan-related financial data on a per-request basis
- —Integrating pay-per-call financial endpoints into agent workflows
- —Accessing premium data without API key registration
Fit
Best for
- —Agents needing keyless, pay-per-request access to financial data
- —Developers experimenting with x402 payment protocol integrations
- —Use cases where flat $0.02/call pricing is acceptable
Not for
- —Production systems requiring documented, stable API schemas
- —High-volume use cases where per-request pricing becomes expensive
- —Users who need detailed documentation or SLA guarantees
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/loans/67 \
-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, but there is zero documentation, no OpenAPI schema, no request/response examples, and no description of what data is actually returned. The docs pages are all empty 'Connect wallet' stubs. This is effectively a stub listing.
Warnings
- —No documentation available — all doc pages render only 'Connect wallet'
- —No OpenAPI or schema describing request parameters or response format
- —The purpose of /api/v1/loans/67 is unclear — 'Premium API Access' is a generic label
- —Response payload structure is completely unknown; agents must discover it empirically
- —No robots.txt or agents.txt present
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/loans/67
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/loans/67
- —Platform advertises $0.02/request flat pricing with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —Docs, API, pricing, and README pages all show only 'Connect wallet' with no substantive contenthttps://lowpaymentfee.com/docs