The Objective Revision Evaluation Service (ORES) is a service that provides AI scoring for revisions. For example, the score indicates the probability of an edit being vandalism. If you want to see what the API does, you can try scoring an edit like this:
You can read more about ORES in Wikidata in this blog post (English).
ORES predictions are now integrated with new RecentChanges and Watchlist filters.