I wrote an article about the Wikidata API for the Web APIs hub [1], which encourages third-party developers to use Wikimedia data and APIS, <https://www.mediawiki.org/wiki/API:Presenting_Wikidata_knowledge>

It shows Maxime Lathuilière's inventaire.io as it talks about associating Wikidata entity IDs with your app and showing data. I welcome any feedback, or you can fix obvious misteaks. Cast your mind back before you knew how to make Wikidata API request. Would this have helped you? What's missing?  Thanks!

[1] https://www.mediawiki.org/wiki/API:Web_APIs_hub , I'll add it to the "Inspire" section soon.