Api Explorer: As part of my work trying to make the Wikia API more accessible to developers, order I’ve created a basic version of an API Explorer.
Open source: There is no reason this should be Wikia-specific, order so I contributed it upstream to MediaWiki. You can find more info on the ApiExplorer Extension page on MediaWiki.org.
Future plans: when there is time, illness I’d like to make the MediaWiki API return its example URLs also. When that is working, hopefully we can make the API Explorer let the user issue those example requests and see the results live (and modify the URLs to issue new test requests).
Don’t forget to follow @WikiaAPI on twitter for more updates!