I run a drupal database (system 2) in the background of my xf1.3 (system 1) delivering json and rss feeds.
On some events of system 2 I would like to notify my forum users (system 1) via the recent activity stream.
Is it possible to write into the activity stream from outside xf (maybe directly to the db)? I've already searched for an API supporting this functionality, but I could not find one. Maybe there is a xf function I could call after loading xf within system 2?