AppleScript to send a SMS from a Mac using Handoff / Continuity

send-text.scpt

-- This script allows to programmatically send a SMS from a Mac using an iPhone carrier plan

-- Requirements :
--  * iPhone running iOS 8.1+ with a proper carrier plan
--  * Mac running macOS 10.10+
--  * Message forwarding should be properly configured on both devices. See
--    https://support.apple.com/en-gb/HT208386

-- Usage :
--   This script should be invoqued via Terminal with the osascript command :
--     osascript send-text.scpt 0123456789 "What's your name, James ?"

on run argv
	set num to (item 1 of argv)
	set msg to (item 2 of argv)
	
	tell application "Messages"
		
		set targetService to 1st account whose service type = SMS
		set num to participant num of targetService
		send msg to num
		
	end tell
	
end run