I've had that same question--I like to weigh my chicken cooked. MFP does not always specify whether the macros are for cooked or raw chicken. Here is a good database, USDA, for all kinds of chicken. (You can look up any food here).
https://ndb.nal.usda.gov/ndb/search/...dard+Reference
Once you find your cut of chicken, cooked, you can search MFP to find chicken that has the same nutritional profile. it takes a little digging.
I use boneless skinless chicken breast. Cooked, 1 oz has 43 calories, 9g protein. 1 g fat. With a different cut, or with skin or bone in, it will be somewhat different.