Probably not natively supported by Apple. But I'm guessing that the Files app just builds on the File Provider extension mechanism [1] that provides the documen

Probably not natively supported by Apple. But I'm guessing that the Files app just builds on the File Provider extension mechanism [1] that provides the document picker in apps, so Transmit can probably expose your servers too. [1] https://developer.apple.com/library/content/documentation/General/Conceptual/ExtensibilityPG/FileProvider.html https://developer.apple.com/library/content/documentation/Ge...