# x-callback-url url:: http://x-callback-url.com Supports inter-app communication… see also [[URI or URL Schemes]] ## Relevant apps - [[Byword]] - [[DEVONthink]] - [[Drafts]] - [[Due]] - [[Evernote]] - [[Fantastical]] - [[Google Chrome]] - [[Google Maps]] - [[Hook]] - [[Instapaper]] - [[Launch Center Pro]] - [[OmniFocus]] - [[Overcast]] - [[Shortcuts]]