The Search Relevance project is run by the WMF Discovery team as a way to include human judgement of relevance in the tuning of search across WMF wiki's.
Owner-only
No
Applicable project
All projects
OAuth "callback URL"
https://relevance.wmflabs.org/oauth/callback
Allow consumer to specify a callback in requests and use "callback" URL above as a required prefix.
No
Applicable grants
User identity verification only, no ability to read pages or act on a user's behalf.