Keycloak user authorization openid-protocol Rest API

Question

i am new to keycloak. I have made web portal that authentication (login, logout,forgot password) of users is done in backend ( PHP ) using REST Api. After successful authentication user is allowed to enter secure part of portal. I am having trouble to get REST API endpoint so that when user is logged in i would like to get a list of permissions that this user have so i can render the UI with functions that specific user have permissions to. So far i found endpoint which can ask for specific permission only

curl -X POST   http://$URL/auth/realms/argo/protocol/openid-connect/token  -H "Authorization: Bearer $TOKEN" --data "audience=$CLIENTID"  --data "permission=$PERMISSIONNAME#$PERMISSIONSCOPE"

Is this possible with keycloak ? I would have maybe around 10 navigation functions and some will be payable so once user buys this function we will allow this permission to this specific user.

Thanks