Stuck finger in friends dogs cage/ not a nice dog but has shots and he went to bite but i moved. felt his teeth/mouth graze finger. no bite. rabies?

Chances VERY low : If no break in the skin, not much chance of infection without it. However, the virus that causes rabies is found in saliva of the animal--if hands were washed well with soap and water--still very low risk. Better to question motive: why stick fingers in caged animal's reach--especially one that doesn't know/like you. You were lucky this time...

Get vaccinated: Most probably you didn't get infected if saliva from dog did not penetrate in your blood. If dog has rabies, see a doctor.