Here is what we get right now:
http://www.mediawiki.org/w/api.php?version
MediaWiki: 1.20wmf1 (c532e81) https://svn.wikimedia.org/viewvc/mediawiki/trunk/phase3/ ApiMain: $Id$ ApiBase: $Id$ ApiFormatBase: $Id$ ApiQueryBase: $Id$
Version: 1.20.x
Severity: minor
URL: http://www.mediawiki.org/w/api.php?version