There are multiple artists by the name Agent X. 1) A British record production, songwriting and DJ team, originally founded as a duo in London by Music College classmates Greg Bonnick and Leon Price, adding Hayden Chapman and Peter Renshaw to the collective in 2009. The music genres include dance, uk garage and pop. 2) An underground Hip-Hop artist from Los Angeles, California.
http://agentx.bandcamp.com/ 3) 80's hard rock band from Hollywood, CA
http://www.demondollrecords.com/agent_x/

Read more about Agent X on Last.fm.