The cartoon used to broadcast in the late 1990s till mid 2000s. The cartoon consisted of three main characters, two guys and a girl. If I'm not wrong they were a team from the USA that hunts down aliens. One of them was a black man with metal arms.
I remember that they wore blue uniforms and that the metal arms guy was the rough one on the team, but I have no more details. I live out of the United States. It is not Generator Rex. This cartoon was on the air around the same time as COPs and Ultraforce.