Hook 3.2 released with new commands, Instapaper and GoodLinks bookmarking, direct iCloud syncing, Merlin Project, Fantastical and more!

You would need to click on the + button and select Merlin Project Express from the list, and then paste in the scripts.

However, I notice that Merlin Project Express does not have a “copy URL” menu item. I doubt that the Express will have an AppleScript API actually. And it is not in the list of linkable apps. It’s their low budget offering, I guess that is why it is not a linkable app.