Mix the red wine vinegar, chopped parsley, minced garlic, onion powder, chopped red chili, oregano, salt, and pepper together in a bowl to make the chimichurri. Let it sit for 10 minutes to infuse the flavors into the oil before using.
Season chicken with salt, then pour 2 tablespoons of chimichurri out into a shallow dish and coat the chicken. Marinate for 20 minutes, putting the rest of the chimichurri aside to use later.
On the air fryer, select Roast, setting the temperature to 380°F / 194°C for 15 minutes. Press Start.
Once the air fryer displays Add Food, open the basket and place the chicken inside. Close the air fryer basket.
Once the air fryer displays Turn Food, flip the chicken with tongs. Close the air fryer basket and continue to cook.
Once the cooking cycle ends, remove the air fryer basket and set it aside. Allow it to rest for 5 minutes.
Spoon the remaining chimichurri over each chicken breast and serve any extra chimichurri together in a small dip bowl on a serving plate. Enjoy!