Paste your x402 endpoint URL. We'll run a real end-to-end check — availability, payment terms, an actual EIP-3009 USDC payment on Base mainnet, delivery, and JSON validity — and email you the full stage-by-stage report. No signup required.
A real USDC payment (up to $0.10) is made to your endpoint on Base mainnet. Limit: 1 check per URL per 24 hours.