We have a new share to Hey.Café url that can be used by external services and scripts like our Share to Hey.Café Siri Shortcut that add's the action to the share sheet on iOS, iPadOS and macOS. You can view that here: Shortcut on iCloud.
The URL format
Data given must be in a base64 format thats been URL encoded to be share safe without characters getting messed up. We will add other post options later on.
Hello World example