{"service":"x402 Payment Guard — Verify Before Signing","price":"$0.01 USDC","network":"Base","method":"POST","request":{"payerAddress":"0x1111111111111111111111111111111111111111","serviceUrl":"https://example.com/api/report","maxAmountUsdc":"0.10","expectedPayTo":"0x2222222222222222222222222222222222222222","minGasReserveEth":"0"},"returns":["safe-to-sign decision","live x402 contract validation","price and recipient checks","buyer funding","destination hazards"]}