Welcome to the Wikimedia Foundation's Wikimetrics homepage.
This API allows you to
- select a set of users, also known as a "cohort" (for example, all users who signed up via the Thank You campaign)
- select a metric to be computed for each of these users (for example, how many bytes they've added) with optional parameters (for example, a time range)
- and retrieve the response in JSON or CSV format.
You can also compute a single, aggregate value for the cohort
(like the mean revert rate)