x402-gated loan data endpoint on Base, pay-per-request with USDC.
What it does
This endpoint at `/api/v1/loans/15` is part of the lowpaymentfee.com platform, a collection of x402-protocol pay-per-request APIs spanning data analytics, AI/ML, finance, and infrastructure categories. The specific `/loans/15` path is not listed on the provider's landing page among the advertised API categories, so its exact functionality is unclear — the generic title "Premium API Access" and the JSON mime type suggest it returns structured data, possibly related to loan or financial information for a resource with ID 15.
The endpoint is live and responds with a valid x402 challenge on Base network. It accepts payment in USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`) with a maximum amount of 20,000 base units, which equals $0.02 (USDC uses 6 decimals). The payment scheme is "exact" with a 300-second timeout. The platform advertises a flat $0.02 per request across all endpoints, no API keys, no rate limits, and instant access.
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 the `/loans/15` endpoint actually returns. The endpoint accepts POST requests based on the outputSchema in the x402 challenge.
Capabilities
Use cases
- —Retrieving loan or financial data for a specific resource (ID 15)
- —Programmatic access to premium financial information via micropayment
- —Agent-driven data retrieval with automatic USDC payment on Base
Fit
Best for
- —Developers needing pay-per-request financial data without API key management
- —AI agents with x402-compatible wallets on Base network
- —Low-commitment, no-subscription access to premium data
Not for
- —Users needing detailed documentation or schema before integrating
- —Bulk data retrieval where per-request pricing becomes expensive
- —Anyone without a Base-network USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/loans/15 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>"Endpoint
Quality
The endpoint is live with a valid x402 challenge and clear pricing ($0.02 USDC on Base), but there is no documentation, no OpenAPI schema, no request/response examples, and the /loans/15 path is not listed among the provider's advertised endpoints. The actual functionality is unknown.
Warnings
- —The /api/v1/loans/15 path is not listed among the provider's advertised API endpoints — its purpose is unclear
- —All documentation pages (docs, API, pricing, README) render only 'Connect wallet' with no content
- —No OpenAPI schema, request format, or response examples are available
- —The endpoint's actual data output cannot be verified without making a paid request
Citations
- —The endpoint returns a 402 x402 challenge requesting 20000 base units of USDC on Base networkhttps://lowpaymentfee.com/api/v1/loans/15
- —The platform advertises $0.02 per request with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/loans/15