Next Wallpaper function with WallStreet

Is it possible to control wallstreet via the ubuntu budgie extras daemon using dbus or some other means?

Wallstreet is a process started on login that just listens to gsettings key changes

Use dconf-editor and examine the keys and descriptions in the gsettings path /org/ubuntubudgie/budgie-wallstreet

The app wallstreet control in your menu just updates these keys.