AppleScript proof-of-concept for toggling Zoom mute. Gracefully handles Zoom not being installed, or not running, or not currently being in a meeting.

toggle_zoom_mute.scpt

-- Based on: https://devforum.zoom.us/t/easiest-way-to-get-mute-status/18462/7

tell application "System Events"
	if exists window 1 of process "zoom.us" then
		tell application process "zoom.us"
			if exists (menu 1 of menu bar item "Meeting" of menu bar 1) then
				
				set meetingMenu to menu 1 of menu bar item "Meeting" of menu bar 1
				set canMute to exists menu item "Mute audio" of meetingMenu
				set canUnmute to exists menu item "Unmute audio" of meetingMenu
				
				if canUnmute then
					click menu item "Unmute audio" of meetingMenu
				else if canMute then
					click menu item "Mute audio" of meetingMenu
				end if
			end if
		end tell
	end if
end tell