Is there a method to validate if the jwt token is from appwrite generated?

In server side (cloud function) we can use the jwt token on .setJWT however I am not planning to set my Appwrite Instance with setJWT, I will use the API Key so that I can access all data in my database whatever the permssion settled. Because as my knowledge know that if we setJWT it will gives us limit access on some document that based on the permission set. And also that if the cloud function execute on client side it will gives automatically jwt token that will pass it on headers alongside on the execution of function. Hence, I want some method that will check if the jwt token given is generated from appwrite server. Is there a method for that?