x402-gated loan data endpoint on Base, pay $0.02 per request in USDC.
What it does
This endpoint at `/api/v1/loans/3` is part of the lowpaymentfee.com platform, a collection of x402-protocol pay-per-request APIs spanning data analytics, AI/ML, finance, infrastructure utilities, and more. The specific resource appears to serve loan-related data (inferred from the URL path), though no detailed documentation or response schema is available for this particular endpoint.
The endpoint is live and returns a standard x402 payment challenge. It accepts POST requests and settles payments on the Base network using USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`). The maximum amount required is 20,000 base units of USDC, which equals $0.02 (USDC uses 6 decimals). The platform advertises a flat $0.02 per request across all endpoints, with no API keys, no rate limits, and instant access.
Documentation is extremely sparse — the docs, pricing, API, and README pages all render only a "Connect wallet" prompt with no substantive content. There is no OpenAPI spec, no response examples, and no description of what the `/api/v1/loans/3` endpoint actually returns. The endpoint is functional from a payment-protocol standpoint, but the lack of documentation makes it difficult to know what data you'll receive after paying.
Capabilities
Use cases
- —Retrieving loan data on a pay-per-request basis without API key registration
- —Integrating loan information into agent workflows that support x402 payments
- —Accessing financial data endpoints with USDC micropayments on Base
Fit
Best for
- —Agents or applications that support x402 payment protocol
- —Users who want keyless, pay-as-you-go API access
- —Developers building on Base who hold USDC
Not for
- —Users who need detailed API documentation or response schemas before purchasing
- —Applications requiring high-volume, subscription-based access at lower per-call cost
- —Anyone needing loan data with guaranteed SLA or support
Quick start
# POST with x402 payment header (USDC on Base)
curl -X POST https://lowpaymentfee.com/api/v1/loans/3 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402_payment_token>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, confirming it accepts USDC payments on Base at $0.02 per call. However, there is no documentation, no OpenAPI spec, no response schema, and no description of what data the /api/v1/loans/3 endpoint actually returns. The docs/pricing/README pages are all empty beyond a wallet-connect prompt. 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 provided; the actual response payload is unknown
- —The specific purpose of /api/v1/loans/3 is inferred solely from the URL path; no official description exists
- —No rate limit or SLA information available
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Base networkhttps://lowpaymentfee.com/api/v1/loans/3
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/loans/3
- —Platform advertises $0.02 per request, no API keys, no rate limits, instant accesshttps://lowpaymentfee.com
- —Docs, pricing, API, and README pages render only 'Connect wallet' with no substantive contenthttps://lowpaymentfee.com/docs