In a bowl, combine chicken, pickle juice, salt and water. Cover, refrigerate and let mixture brine for at least 6-8 hours (24+ hours is ideal).
In the meantime, you can prepare the chicken breading mixture by dumping all of the remaining ingredients into a plastic storage bag and shaking to mix.
When your tenders have brined long enough, you are ready to prepare them. Spray your air fryer basket with cooking spray before putting the chicken in the air fryer basket.
Using a fork or tongs, grab each chicken tender from the bowl and shake off any excess liquid. Then, toss directly into the breading mixture.
Seal the bag and shake it around, ensuring that the each tender gets a nice coating of the breading. I like to coat mine one at a time to prevent clumping.
Gently assemble the tenders in the air fryer basket. Spray the tops of them with cooking spray.
Cook at 400º for 7 minutes, flip, and cook for an additional 5 minutes. That's 12 minutes total.
Remove from air fryer and check if fully cooked through. If not, put back in the air fryer in 1 minute increments until chicken tenders are fully cooked.