Scrub the potatoes clean and pat dry. Poke each potato several times with a fork all over.
Rub each potato with olive oil and sprinkle generously with coarse sea salt and black pepper.
Place the potatoes in the air fryer basket. Cook at 400°F (200°C) for 35 to 40 minutes, flipping halfway through, until the skin is crispy and a fork slides easily into the center.
Remove the potatoes and let them rest for 2 minutes. Cut a slit down the top of each potato and gently squeeze the sides to open.
Top each potato with a tablespoon of butter, a dollop of sour cream, shredded cheddar cheese, and chopped chives. Serve hot.