Within MAST, you can potentially encounter these Starfield NPCs:
The United Colonies faction maintain a presence at this location.
Any number of locations in Starfield can provide you with quests, radiant missions, and Mission Board terminals from which to accept additional tasks.
Here are all the confirmed missions you can begin at MAST:
MAST items and loot
You can potentially find the following items and loot at MAST:
No weapons have been confirmed at this location.
No armor pieces have been confirmed at this location.
No additional items have been confirmed at this location.