x402-gated loan data endpoint on Base, pay-per-request with USDC.
What it does
This endpoint at lowpaymentfee.com provides access to a specific loan resource (loan ID 19) behind an x402 payment wall. The endpoint accepts POST requests and returns JSON. Payment is settled on the Base network using USDC (contract 0x8335…2913) via the x402 "exact" scheme. The maximum amount required per call is 20,000 base units of USDC, which equals $0.02 (USDC uses 6 decimals).
The broader lowpaymentfee.com platform advertises a wide catalog of pay-per-call APIs spanning data analytics, AI/ML inference, finance/Web3 data, and utility services — all priced at $0.02 per request with no API keys, no rate limits, and no commitments. However, the specific endpoint being listed here (/api/v1/loans/19) is not explicitly documented on the site's landing page or in any crawled documentation. Its description is simply "Premium API Access," and no request/response schema is provided beyond the x402 challenge metadata.
The endpoint is confirmed live: it returns a well-formed x402 version 1 challenge with a 402 status code. The site root loads successfully (HTTP 200). Documentation pages (/docs, /pricing, /api, /README) all returned only a "Connect wallet" prompt with no substantive content, so the actual behavior and response format of this loan endpoint remain unknown.
Capabilities
Use cases
- —Retrieving loan record data on a per-request payment basis
- —Agent-driven financial data lookups without API key provisioning
- —Programmatic access to loan information settled via USDC on Base
Fit
Best for
- —Agents or services that need on-demand loan data without subscription commitments
- —Developers experimenting with x402 payment-gated APIs
- —Workflows requiring keyless, pay-as-you-go financial data access
Not for
- —Bulk or high-volume loan data retrieval where per-request pricing is inefficient
- —Users who need detailed documentation or guaranteed SLAs before integrating
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/loans/19 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, but there is no documentation for this specific loan endpoint, no request/response schema, and the docs/pricing/API pages are empty stubs. The endpoint path (/api/v1/loans/19) does not appear in the site's own catalog. Effectively a stub listing.
Warnings
- —No request or response schema available for /api/v1/loans/19
- —This specific endpoint is not listed in the provider's own API catalog on the landing page
- —All documentation pages (/docs, /pricing, /api, /README) returned only 'Connect wallet' with no content
- —The purpose and data returned by this loan endpoint are unknown — 'Premium API Access' is the only description
Citations
- —The endpoint returns a valid x402 version 1 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/loans/19
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/loans/19
- —The site advertises $0.02 per request pricing with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —The /api/v1/loans/19 path is not listed among the site's documented API endpointshttps://lowpaymentfee.com