Pat chicken thighs dry with paper towels. This helps achieve crispy skin. In a small bowl, whisk together olive oil, paprika, garlic powder, onion powder, cayenne pepper (if using), salt, and black pepper.

Rub the seasoning mixture all over the chicken thighs, ensuring they are evenly coated.

Preheat your air fryer to 375°F (190°C) for 5 minutes. If your air fryer doesn't have a preheat function, simply run it empty for 5 minutes.

Place the seasoned chicken thighs in a single layer in the air fryer basket, skin side up. Do not overcrowd the basket; cook in batches if necessary. Air fry for 18-22 minutes, flipping halfway through.

Cook until the internal temperature reaches 165°F (74°C) using a meat thermometer and the skin is golden brown and crispy.

Remove the chicken thighs from the air fryer and let them rest for 5 minutes before serving. This allows the juices to redistribute, keeping the chicken moist.