Redirects phone links like callto:, tel:, or sms: to a user-provided shell script.
Download the latest release of this project and move the clicktoshell.app file in /Applications (or somewhere else).
You should also install RCDefaultApp to make it easy to register the right protocol handlers.
In RCDefaultApp, go to the "URL" tab, select callto for instance, then select clicktoshell.app as a default app.
Then, create a file clicktoshell-callto.sh in your user directory (for instance, /Users/Bob/clicktoshell-callto.sh).
Don't forget to run chmod +x clicktoshell-callto.sh and bypass the MacOS security features!
This shell script will get executed each time the user clicks a callto: link, with the phone (formatted in international format) as first argument.
An example of script using the Keyyo VoIP API:
curl https://ssl.keyyo.com/makecall.html?ACCOUNT=+33111111111&CALLEE=$1&CALLEE_NAME=Keyyo