Preheat oven to 400°F (200°C) and line a baking sheet with parchment paper.
In a large mixing bowl, combine the ground chicken, harissa paste, breadcrumbs, egg, garlic, parsley, cumin, salt, and pepper.
Mix the ingredients by hand until just incorporated, taking care not to overwork the meat.
Scoop and roll the mixture into 1.5-inch diameter meatballs, yielding approximately 16 units.
Arrange the meatballs on the prepared baking sheet with at least 1 inch of space between each.
Bake for 18 to 20 minutes, or until the internal temperature reaches 165°F (74°C) and the exterior is slightly browned.
Remove from oven and let rest for 5 minutes before serving.