Hook 3.0 includes an update for
Hook to New > Craft. It also includes updated possibilities for x-callback-url with Hook.
I.e., a developer does not need to support AppleScript in order to make their app linkable.
Developers and automators can have a look at our Craft integration scripts as an example. Drafts is another good example of Hook using x-callback-url to integrate with apps. There are others.