It looks like Api classes are all over the place.  I would say do not put it in /includes/api/wikia because there is only 1 file there.  We should probably move that other file.  The two places where Api classes seem to gather are /includes/wikia/api  and /extensions/wikia/WikiaApi I don't know which one we are "supposed" to use, actually.

@Wikia/platform-team