The Google Play Game Services Management Java Library allows developers to integrate the Management API for Google Play Game Services into their Java applications. Developers can add the library to their Maven or Gradle projects using the code provided, or they can download the necessary jars as a zip file.
PUBG has launched a test version of the PUBG Developer API. The API provides rich game data for developers looking to build tools and services around PUBG's popular battle royale game mode. PUBG anticipates the API will lead to apps and tools that expand what is currently available through OP.GG.
There's no doubt that Wikipedia is a giant store of information. And yes, they have an API, but the data isn't exactly structured. But that didn't stop Jim Blackler, who created Quizipedia, a fun game based off of Wikipedia entries.