we need an API bucket at https://www.mediawiki.org/wiki/Special:Search
so if someone searches for "recent changes" and selects API they find API:Recentchanges and RCStream
This seems a reasonable request. I think the only way to add a new search profile tab to Special:Search is by hooking the SpecialSearchProfiles event in PHP, e.g. in extensions/WikimediaMessages/WikimediaMessages.hooks.php, similar to its onSkinCopyrightFooter() hook.
The workaround is to click Advanced and uncheck the Main, Help, and possibly Manual namespaces