A wirelessly powered and controlled robotic apparatus enabling performance of tasks within a three-dimensional space includes a rail, a robotic unit, and a tool. The rail comprises negative and second paths to carry an electrical current. The robotic unit comprises a microcontroller having a drive motor and a transceiver engaged thereto and is engaged to and electrically coupled to the rail. A transfer unit is engaged to both the drive motor and the rail and thus can translate rotation of the drive motor to a force to motivate the robotic unit along the rail. The microcontroller selectively actuates the transfer unit to move the robotic unit along the rail to a location. The transceiver receives commands wirelessly from a control unit and transmits data thereto. The tool is engaged to the robotic unit and can perform a task at, or proximate to, the location.