How to Build a Segment Server-Side Using Postbacks
You may wish to create a segment server-side from a postback. Common use cases in-app are for excluding users who have installed the app, retargeting installed users for in-app events, or encouraging new sessions of lapsed users. A common use case in desktop is to add users to segments without needing to tag your website.
This postback tag will be the URL of a Segment Tag with the additional below parameters. You would replace [USER_ID] with the actual user ID of the respective type being noted in the value of user_id_type parameter.
For segmenting on in-app events, you would need to ensure your postback vendor can also fire additional postbacks to the conversion or event postback fired at the time of the event.
For Desktop or Mobile Web (Note: this would require a cookie sync in place with Beeswax):
For example, the original segment URL looks like this:
And the postback URL for segments will look like this (iOS is being used in this example):