Harry Chess, aka "That Man From A.U.N.T.I.E.", is an agent with A.U.N.T.I.E.
Well, duh! With the organization, Chess has the codename of Agent 0068 7/8.
Okay, since you were wondering, the acronym stands for "Agents' Undercover Network To Investigate Evil" which, as far as odd acronym-breakdowns go is not too bad. The same cannot be said for the leader of that organization, a man known only by his codename, "FU2".
In the introduction of the operative to us in the first recorded adventure regarding a particularly nasty problem, we are told in a way that made it sound like the solution found was not unusual: "The CIA wouldn't touch it. J. Edgar and his boys(!) thought it too dangerous. The Girl Scouts were busy. So naturally it had to be Harry Chess...that wealthy, young bacherlor-about-town...the crusading editor-publisher of 'WANT' (the physique mag with a difference!). H.C. is in reality secret-super agent '2 For F.U.G.G.', the secret-super protective force of the mottomachine society (...and we all know who they are). [Okay, that last part ... I don't.]"
We are also told how "Harry, FUGG'S top secret-super agent, and his young muscular assistant and confidant [and adopted brother] - the lovely Mickey Muscle - are constantly battling the evil forces of the erotic and the nasty - wherever the heteros fear to tread - and wherever super danger and creamy intrigue call!"
Chess is a former trapeze artist who is quite tall and physically in superb shape, not to mention being "rugged, virile, sensuous, clever". He has a head of thick black hair which seems to match that on his chest (sort of explains his name). His wealth allows him to have a plush house right off Central Park and under that landmark he has his headquarters and garage.
Crew-cut blond-haired Mickey Muscle, as mentioned, is the sidekick of Chess and is always very close to his friend and mentor. This fellow who is also quite muscle-bound, as his name would indicate, is a fellow of few words. In fact, when he speaks at all, he tends to just say, "Gee" - okay, I saw a "Yah" once.
The sort of bad-niks that Chess goes up against are just what you would expect a parody of James Bond and the Man From U.N.C.L.E. to produce, which you really need to read to believe - and even then you won't but you will likely groan.