Preheat oven to 400 degrees. Line a baking sheet with foil.
In a medium bowl, beat together cream cheese, cheddar cheese, salsa, cumin and salt. Stir in chicken. Spoon about 1 tablespoon into each jalapeno half and place on prepared baking sheet. If desired, sprinkle with paprika or chili powder. Bake about 20 minutes or until golden brown.
Wear protective gloves to prevent skin irritation while handling peppers