Preheat the oven to 400°F (200°C). Line a baking sheet with parchment paper.
In a large mixing bowl, combine the shredded chicken, egg, shredded mozzarella cheese, grated Parmesan cheese, garlic powder, dried Italian seasoning, salt, and black pepper.
Mix all ingredients thoroughly until a dough-like consistency forms. Use your hands or a spoon to press the mixture together.
Transfer the mixture to the prepared baking sheet. Using your hands or a spatula, shape the mixture into a round pizza crust about 1/4 inch thick and approximately 8 inches in diameter.
Bake the crust in the preheated oven for 15 to 20 minutes, or until the edges are golden brown and the crust is firm to the touch.
Remove the crust from the oven and add your favorite keto-friendly pizza toppings.
Return the pizza to the oven and bake for an additional 5 to 7 minutes, or until the toppings are heated through and the cheese is melted and bubbly.
Let the pizza cool for a few minutes before slicing and serving.