A very simple Python class to get the current list of iCloud Tabs known to your Mac. The list does not update instantaneously as you browse, but usually seems to catch up within a few seconds.
sudo python setup.py install
In Python:
from icloudtablibs import iCloudTabsReader
iCloudTabsReader().tabs
The tabs member of iCloudTabsReader() is a list of current iCloud Tabs. Each tab is represented as a dict with three properties: title, url, and device (the name of the device on which that tab is open).