Add the oil to a sauté pan over medium-high heat and allow to come to temperature. Add the onion and jalapeños and sauté 4-6 minutes, until softened. Remove from the heat and transfer to a 4-6 quart slow cooker.
Add the chicken breasts, taco seasoning, salt, beans, corn, tomatoes, and chicken broth to the crockpot as well. Stir to combine and cover with the lid. Cook for 2-3 hours on high, or 4-5 hours on low, until the chicken is fully cooked through.
Remove the cooked chicken from the slow cooker and shred. Return to the crockpot, and add in the juice of half a lime and chopped cilantro. Stir once more. Add desired toppings, serve and enjoy!