[tga]

_Every_ ticket system with an API (all of them) is a ticket system in a box. You can add that functionality to your application by talking to the API directly.

I think what you are thinking about is a standard API for ticket systems, that would allow you to transparently swap them. Unlike authentication, nobody has bothered to standardize something like that because ticket systems are more varied, not as often integrated into other platforms, and even more rarely replaced.