I am looking for a program, script or browser extension that can automatically pick up a phone call on Google Hangouts, type a few keys (random or prespecified), and hang up. It should only do so for some specified phone numbers.
It should work on Microsoft Windows, Mac OS X or Linux. Any price or license is fine.
I know I could use Sikuli, but I would rather prefer not to have to leave a Hangouts tab visible.