I accidentally deleted a Drafts action that I use several times a day. Ugh! It took me a surprisingly long time to re-create it, so I'm posting it here as a note to my future ham-fisted self.
This action appends the contents of the draft to an existing sheet in Ulysses. It also adds the current date (preceded by a space) to the end of the draft.
The x-callback URL for Ulysses is:
You’ll need to replace the ID with the ID of the sheet you want to append. You get the Ulysses sheet ID via the Share menu (believe it or not.)
There's also a copy of this stashed in the Actions Directory.