Which is the validity of a session token?
The session token will expire only after 60 minutes of inactivity. Any request made using that token will "reset" the countdown, keeping the token "fresh". If the token has expired you can generate a new one by using the login webservice. If you are not sure wether your token is valid or not, we suggest you to check its validity before making any request, this can be done with a validateToken request.