There were a lot of spy stories in the 1960's. "Magic Agent" was different in that he had magic powers, something that was true of a number of characters in the American Comics Group stories at the time. They were the publishers of ADVENTURES INTO THE UNKNOWN, which was one of the first as well as one of the longest-running fantasty comic books of the time.
The Comic book JOHN FORCE, MAGIC AGENT only ran three issues, but later the character was revived and ended up being the last regularly published character the American Comics Group had before going out of business.
ACG Comics At Digital Comics Museum:
ACG Comics At Comic Books Plus:
ACG Comics At The Internet Archive:
D.C.'s "Other Comics":
Forbidden Adventures: History Of ACG Comics:
Forbidden Adventures - Alter Ego Reprint:
John Force, Magic Agent - Toonpedia:
Time Bulleteer - ACG Blog: