{"mensaje":"Este endpoint requiere POST con JSON, ej: {\"addresses\":[\"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913\",\"0xF977814e90dA44bFA03b6295A0616a897441aceC\"],\"network\":\"base\"}. Precio: $0.003 USDC (Solana o Base)."}