Since it has been broken since the move to git and is unlikely to
have been particularly useful anyway, I've just merged a change to
remove the version information (and the 'version' parameter) from the
API help. This may result in a warning about an unrecognized
Also, the 'version' property in the results from action=paraminfo will
now be the empty string. It was not removed completely at this time to
avoid breaking clients where accessing an undefined property is a
fatal error; however, it should be considered deprecated and may be
removed in a future version.
Note that version information for MediaWiki as a whole is still
available via prop=siteinfo.
: e.g. https://en.wikipedia.org/w/api.php?action=query&meta=siteinfo