A broker is a contact in City of Villains that interacts with a character based on missions he or she has completed in the Rogue Isle Protector newspaper.
When a villain visits a broker for the first time in Port Oakes, he or she can then read the newspaper to get schemes, or short missions. Once the villain has completed enough schemes, the newspaper will have a coded message to visit the broker to complete a Mayhem Mission. Successful completion of a mayhem mission will possibly result in other contacts being introduced.
Schemes are level-specific, and once a character reaches a high enough level, checking the newspaper will result in getting a message that says, "Nothing here catches your interest," and no further schemes will be available in that zone and no further contacts may be introduced by the broker of that zone.
Each zone has two brokers except Grandville which only has one.