We provide an automatic brain slice registration service where users can upload single brain slice images stained with PI or DAPI. This service, through approximately 10 minutes of background computation, extracts a slice from the three-dimensional STAM that is closest to the position of the user-uploaded brain slice. After nonlinear registration, the registered image is then returned to the user. Additionally, users receive access to isotropic 1-micron resolution cytoarchitectural slice with the same position and angle.