There is provided a device application programming interface (API) for securely monitoring and managing mobile broadband devices. There is provided a client device with a processor configured to detect, using an API, the WWAN device, wherein the WWAN device conforms to the API, to perform a mutual authentication with the WWAN device by using a digital certificate of the WWAN device and a client digital certificate of the client device, to establish a secure connection with the WWAN device upon a successful authentication of the mutual authentication with the WWAN device. Moreover, the processor may be configured to issue, using the API, various commands to the WWAN device to monitor and manage the WWAN device.