Dear all,
I just started to implement a simple GraphQL wrapper on top of the Wikibase API. For those who do not know what GraphQL is, it is a query language optimized for data retrieval: http://graphql.org/ It currently maps most of the PHP DataModel structures with an interface similar to the one of the JSON API and provides some demo queries and mutations.
More details are in this Phabricator task: https://phabricator.wikimedia.org/T173214
Happy new year,
Thomas (User:Tpt)