Brett on 19 Jan, 2016 01:54 PM
Streaming preview requires a native app with direct integration, so that
won't be much help. If you can pull text from a web url or API, you
could create an external script to write it to a file and open that file
in Marked. Marked's polling features would only detect file changes when
your script writes to the file, so it would have to continually poll the
url for changes to get any kind of "live" preview.