I'm trying to use this URL: editorial://x-callback-url/?command=Back%20Ups&x-success=omnifocus://
But I'm getting this error message: Invalid URL: The first part of the URL must be either "open" or "new".
Any thoughts would be appreciated!
You can either use
x-callback-urlor leave it out entirely (as @maciejj suggested). It looks like I didn't read the spec properly...