Methods and systems are described for processing an attached command response. In one aspect, an attachable command is sent in a first HTTP request to a server node. A second HTTP response to a second HTTP request sent to the server node is received. A determination is made that the second HTTP response includes at least a portion of the first command response.In another aspect, a first command is identified in a first HTTP request received from a user agent node. A determination is made that a first command response to the first command is attachable. A second HTTP request received from the user agent node identifying a second command. A second HTTP response to the second HTTP request is sent including at least some of the first command response.