Mix together the softened cream cheese, shredded cheddar cheese, chopped green onions, garlic powder, onion powder, and cayenne pepper in a mixing bowl.
Prepare the low-carb crescent dough by unrolling it and separating it into triangles.
Spoon a small amount of the cream cheese mixture at the wide end of each dough triangle.
Roll the dough around the filling, pinching the edges together to seal.
Arrange the filled poppers on a baking sheet lined with parchment paper.
Brush the tops with beaten egg for a golden finish.
Bake in the preheated oven for 15-20 minutes, until golden brown.