{"mensaje":"Este endpoint requiere POST con JSON, ej: {\"data\":\"0xa9059cbb0000000000000000000000007e5f4552091a69125d5dfcb7b8c2659029395bdf00000000000000000000000000000000000000000000000000000000000f4240\"}. Precio: $0.003 USDC (Solana o Base)."}