In a medium bowl, whisk together the olive oil, lime juice, apple cider vinegar, and honey until well combined.
Add the chili powder, cumin, garlic powder, onion powder, smoked paprika, salt, black pepper, and cayenne pepper (if using) to the bowl. Whisk until all the spices are fully incorporated.
Place the chicken in a large resealable plastic bag or a shallow dish. Pour the marinade over the chicken, ensuring it is evenly coated. Seal the bag or cover the dish.
Marinate the chicken in the refrigerator for at least 30 minutes, or up to 4 hours for more flavor.
Preheat your grill or skillet over medium-high heat. Remove the chicken from the marinade and discard the excess marinade.
Grill or cook the chicken for about 6-7 minutes on each side, or until the internal temperature reaches 165°F.
Let the chicken rest for 5 minutes before slicing or shredding. Serve in tacos with your favorite toppings.