Ok, I have a rough version of a CLI ready. You can find the code in the GitHub repo, and it can be installed with gem install hookapp (or sudo gem install hookap if that doesn’t work).
hook help will show all available commands, and you can use hook help COMMAND to get detailed info and options for any specific command. I’ll do a bit more documenting on the GitHub README as I go.
One issue I’m running into, @LucB, is that when I trigger the AppleScript command bookmark from URL on a Hook URL to an email, it comes up with a blank title. It seems to work fine for file paths, but gives me nothing to work with for other hook urls. Am I using the method incorrectly?