Getting positions of all 3D trackers

I did a motion tracking and Blender set the scene with camera, camera solver and all the trackers.
Now I need to get positions of all those trackers in order to create a null for everyone of them.
How do I get the list of those trackers by selected camera?
Thank you in advance.

i bump this up, because i have the same problem

can any one give a hint where to start?