In a large bowl, add your chicken legs, oil, kosher salt, and black pepper. Toss to coat.
Place the coated chicken legs into the air fyrer basket, in a single layer, and set the cooking time for 25-30 minutes at 400 degrees F, using the air fryer setting. Remove when the internal temperature reaches 165 degrees F, by placing the meat thermometer into the thickest part of the chicken leg.
While the chicken is cooking, in a large bowl, add the yellow mustard, whole grain mustard, and honey, and mix well.
Add the chicken to the glaze/sauce and toss, then return to the air fryer for 3-5 minutes, at 400 degrees F.
Serve with your favorite dipping sauce or fresh herbs.