You might want to remotely initiate the process of download or, give other people to remotely add torrents to seedbox without them actually login in your seedbox ip/ domain.
3. Set up https://www.dropbox.com/download?dl=packages/dropbox.py on your seedbox.
4.Set a crontab (crontab -e) to move all *.torrent files from for example ~/private/dropbox/torrents/ to ~/private/client/watch every minute or whatever is suitable for you.
5. If you have a continuously on PC then you can also use pypush, you can get pypush Here
Pypush continuously monitors your local directory and immediately uploads any changes you make to your specified remote directory. You can also just make some changes locally, then periodically run pypush to synchronize all those changes to the remote directory.
What sets pypush apart is its real-time sync, and its integration with Git/Mercurial. Any local files ignored (and untracked) by Git/Mercurial will not be pushed to the remote machine.