Yes, cagy is a Scrabble word!
...and is worth 10 points in Scrabble, and 11 points in Words with Friends
cagy
Adjective
1. Showing self-interest and shrewdness in dealing with others
2. Characterized by great caution and wariness
What Scrabble words can I make with the letters in cagy?
3 Letter Words
2 Letter Words