Evernote’s integration story is a bit of a mess. They never supported Mac properly, and dropped most of the standard methods of integration (like URLs on iOS and AppleScript on Mac) they did support.
Details in the Evenote integration guide about what you can and can’t do.
I really would only recommend email into Evernote (which you can do with background email actions in Drafts) as a way to integrate right now. The actions that work on iOS only still work for now because I have made my own fork of their no-longer-supported iOS SDK.
Sorry to not have a better answer, but it’s on Evernote.