Suggestion : x-callback-url feature

I would like to see x-callback-url functionality added.

It’s a huge convenience whenever I use it in Trello.

I’d like to see it supported in whimsical as well.

example1)

onenote:Sign in to your account{F4309D59-95D0-4B4F-B119-86A2AC154528&end

example2)
jetbrains://web-storm/navigate/reference?project=PROD_WEB_CCS2&path=src/app/subscription/subscription/car-subscription-insert.html:594:14

xcallback