Those attending a meeting of the Association of Football Agents (AFA) in London on Wednesday were clear in their opposition to the move.
"If you ask players what they want, they are in favour of agents. There are never complaints about agents' fees from players," the BBC quoted Jonathan Barnett, who represents Real Madrid forward Gareth Bale, as saying.
"We will try until the last minute to resolve the problem but rest assured, if necessary we will go to every court in the world."
Others attending included Mino Raiola, who represents Manchester United's Paul Pogba and former Sweden international Zlatan Ibrahimovic, and Cristiano Ronaldo's agent Jorge Mendes.
Mel Stein, the AFA life president, said a united policy had been agreed.
FIFA said the soccer body was "aiming for a system of balanced and reasonable regulation, instead of the law of the jungle currently in place, with conflicts of interests rife and exorbitant 'commissions' being earned left and right."
"FIFA is currently developing these proposals to be turned into regulations," it added in a statement on its official website (www.fifa.com).
"This work is done in consultation with the football stakeholders, including agents' representatives." (Reporting by Alan Baldwin, editing by...)