This market has a number of reputable agents. If you are serious about acting, you’ll want to find a legit agent who is accredited by SAG/AFTRA, which is the professional union for actors. These agents represent union and non-union talent, but they have access to all the national acting databases that some other agents who are not accredited do not have access to.
An agent should never charge you before booking you work. Do not pay any meeting or administrative fees (which are both red flags). Once an agent represents you, you should pay a 10-20% commission depending on whether you are union or not and what the booking is.