I just noticed that 'heading' info is not available in the Live API option. See doc here: openskynetwork.github.io/opensky-api/python.html. Can someone confirm that my understanding is correct? If not, please let me know how I can retrieve the heading info through the live API option.
do you mean the pointing of the aircraft with heading? I am not sure if this is an info which is send.
If you mean the direction in which the aircraft is travelling then it is the true_track. It is the 11th entry in the state vector.