1. A system, comprising: a receiving module to receive a selection request indicating selection of a user interface element from a client device and receive encoded image data from the client device, the encoded image data being representative of one or more optical machine-readable representations of data; an access module causing the client device to access an image capture application, based on the selection request; a decoding module to decode the image data to retrieve the one or more optical machine-readable representations of data; a determination module to determine one or more items associated with the one or more optical machine-readable representations of data; and a presentation module to cause presentation of item data representative of the one or more items at the client device.