Abstract: An interface (8) for attaching a tool or a payload (9) to an Unmanned Aerial Vehicle, UAV (1), the interface having, on a tool or payload side of the interface, at least one first connecting element (8a) for connecting a tool or payload to the interface on said tool or payload side thereof, and on a vehicle side of the interface, at least one second connecting element (8b) for connecting the interface to an UAV on the vehicle side thereof. At least one sensor unit (8c) configured to measure at least one physical property of the tool or payload, when it is connected to the interface, and at least one control unit (8d) in operative connection with the at least one sensor unit. The control unit is configured to communicate with a flight control unit (6) of the UAV for providing it with data related to the measured at least one physical property.