x402 endpoint tester API (payment-required validator). x402 endpoint doctor for sellers: probes your paid URL unpaid (GET, HEAD, empty POST, CORS preflight; never pays) and returns a grade and a fix list. Checks the v2 PAYMENT-REQUIRED header and v1 body, every accepts entry (USDC asset, EIP-712 domain, Solana feePayer, atomic amount, payTo), multichain price consistency and the Bazaar declaration against its own JSON Schema.
| Network | Scheme | Amount | Pay To |
|---|---|---|---|
| Base | exact | $0.005000 USDC | 0x3c1A...8d6F |
| Polygon | exact | $0.005000 USDC | 0x3c1A...8d6F |
| Arbitrum One | exact | $0.005000 USDC | 0x3c1A...8d6F |
| solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp | exact | 0.01 tokens | FH73Wb...2Jte |