A system for diagnosing and repairing vehicles includes a diagnostic vehicle system having at least one electronic controller for configured to execute algorithms that generate data related to the diagnostic operations of the vehicle. Also includes is an interface in communication with the at least one electronic controller of the diagnostic vehicle system and at least one electronic controller of the vehicle. The electronic controller is configured to provide access via an application programming interface to a user via the interface to data generated by the algorithms and restrict access to the algorithms that generate the data related to the diagnostic operations of the vehicle.