When I kept larger species and they were housed outside I would see them snag wasps, hornets, bumble bees, yellow jackets etc. I never had a problem with stingers although I know someone did last year and one of my facebook friends just had its tongue stung. Just watch him to see if he is having trouble in any way. Feeding, breathing or any swelling.
I would say he should be fine if you havent noticed anything yet