Mississippi law prohibits the possession of non-human primates as pets. While there may be exceptions for research or educational purposes, it is highly unlikely for an individual to obtain a permit to keep a monkey.
It's important to remember that monkeys are wild animals with complex needs that cannot be met in a domestic setting. They require specialized care, including a large and stimulating environment, a varied diet, and veterinary care.
If you are considering getting a pet, there are many other legal and suitable options available.