MediaWiki:Apihelp-query+watchlist-param-show
From DISCO3.CO.UK Knowledge Base
Show only items that meet these criteria. For example, to see only minor edits done by logged-in users, set $1show=minor|!anon.
Show only items that meet these criteria. For example, to see only minor edits done by logged-in users, set $1show=minor|!anon.