In a large bowl, gently fold together crab meat, panko breadcrumbs, mayonnaise, egg, dijon mustard, lemon juice, old bay seasoning, parsley, and green onion. Be careful not to break up the crab too much.
Form the mixture into 6 equal patties, about 3/4-inch thick. Place them on a plate and refrigerate for 15 minutes to help them hold their shape.
Preheat the air fryer to 375°F (190°C). Spray the basket with cooking spray.
Place the crab cakes in the basket with space between each one and spray the tops with cooking spray.
Air fry for 10 to 12 minutes, carefully flipping once halfway through, until golden brown on both sides and heated through.