Yes! You can post to, and from Secret Boards on Pinterest with Viraltag.
Pinning to Secret Boards
After you connect your Pinterest profile under 'Accounts', and grant Viraltag permission to access your account, a 'Pin to Secret Boards' window opens up. Enter your Pinterest account credentials, and you're all set!
The next time you pin an image, you will find your secret boards listed as options in the drop down menu while scheduling.
If you have already connected your Pinterest account and have not enabled pinning to secret boards, head over to the 'Accounts' section on Viraltag and click on the 'Connect to pin to secret boards' option next to your Pinterest Profile.
Pinning from Secret Boards
To Pin from secret boards to other public boards or your other social accounts, use the chrome extension to pick up the pin from your Secret board on Pinterest, and schedule it to go out to any other social profile with Viraltag.