For MusicBrainz display, it might be interesting to have a way to query the average rating for a CB entity. This is currently calculated for display on the CB website, but is not available on the API at all.

Alastair mentioned that an average rating wouldn't quite match the /review endpoint since that isn't necessarily about a specific entity (it can also be all reviews by a user, for example). As such, it might make sense to have an /entity endpoint or even /artist, /release_group etc endpoints. If we ended up doing this, it might be useful for MusicBrainz purposes to also return the most recent and highest rated text reviews, along with a review count, to avoid the two separate /review calls we currently use.