In a small bowl, mix together all the spices: paprika, garlic powder, onion powder, oregano, cayenne pepper, thyme, salt, and pepper.
Rub the spice mixture all over the chicken breasts, making sure they are coated evenly. Let them marinate for at least 30 minutes in the refrigerator.
Heat the olive oil in a large skillet over medium-high heat.
Add the chicken breasts to the skillet and cook for about 6-7 minutes per side, or until they are cooked through and no longer pink in the middle.
Remove the chicken from the skillet and let it rest for a few minutes before serving.
Serve the Cajun chicken with your favorite side dishes like rice, vegetables, or salad. Enjoy!