# API MSUI includes an extensive API that you can use to integrate MSUI with other systems such as Halon to manage domains, users, and its settings. It is also possible to let users create an access token that can be used for API authentication, the access token will then be linked to the user and have the same permissions. > > **Note** > > > > Access tokens has to be created from the web administration when logged in as a user. The full API reference can be found [here](https://docs.halon.io/msui/api/).