In a mixing bowl, combine oats, coconut, flax, chia, salt, cinnamon, and espresso powder.
Add peanut butter, honey, and vanilla. Mix until it holds together. If too dry, add ½–1 tsp honey or warm water. If too sticky, add a little more flax or coconut.
Fold in chocolate chips.
Roll into 1 tablespoon size balls and chill at least 20 minutes.