Preheat air fryer to 380° Fahrenheit.
Place 6 medium boneless, skinless chicken thighs on cutting board. Trim chicken thighs as needed, removing any excess fat.
Add 1 teaspoon paprika, 1 teaspoon garlic powder, ½ teaspoon freshly cracked black pepper, and 1 teaspoon salt to small mixing bowl. Mix spices together until well blended.
Pat chicken thighs completely dry on all sides with paper towels. Sprinkle half of spice blend over prepared chicken thighs, then gently rub spice blend into thighs. Flip chicken thighs over and repeat, seasoning other side of chicken thighs completely.
Remove basket from preheated air fryer and lightly spray basket with neutral-flavored spray oil, making sure to cover bottom and sides of basket.
Place seasoned chicken thighs in air fryer basket with smooth side of thighs facing up, arranging thighs in one even layer without overlapping or touching.
Return basket to preheated air fryer. Air fry chicken thighs 10 minutes.
After 10 minutes, remove basket from air fryer. Flip chicken thighs over, again arranging thighs in one even layer without overlapping.
Return basket to air fryer. Air fry chicken thighs 4 minutes.
After 4 minutes, remove basket from air fryer. Insert internal meat thermometer into thickest area of chicken thighs. If internal temperature of chicken is below 160° Fahrenheit, return basket to air fryer and air fry chicken 1 to 2 minutes more.
When internal temperature of chicken thighs reaches 160° to 162° Fahrenheit, transfer chicken thighs to serving plates. Set chicken aside to rest 5 minutes, allowing internal temperature to reach 165° Fahrenheit.
After resting chicken 5 minutes, serve thighs warm with desired sides.