Add the onion, garlic, bell pepper, black beans, corn, diced tomatoes, tomatoes with green chilies, chicken broth, and tomato paste to the crockpot. Stir to combine.
Season with chili powder, cumin, smoked paprika, oregano, salt, and pepper.
Stir again to distribute the spices evenly.
Nestle the chicken breasts into the mixture, making sure they’re mostly submerged.
Cook on Low for 6–7 hours or High for 3–4 hours, until the chicken is cooked through and tender.
Remove the chicken to a cutting board. Shred with two forks, then return it to the crockpot.
Stir in the lime juice. Taste and adjust seasoning with more salt, pepper, or chili powder as needed.
Serve hot with tortilla strips or crushed chips and your favorite toppings: avocado, cheese, cilantro, sour cream, and extra lime wedges.