1. A stateless cookie operations server machine, comprising: at least one processor; and at least one memory storing computer-executable instructions that, when executed by the processor, cause the server machine to: receive name-value pairs as input parameters in a HTTP GET message; receive a cookie data file in a header of the HTTP GET message; parse the input parameters to identify the name of the name-value pairs; parse the name to identify a cookie name; parse the name to identify an operation; compare the operation to a list of predefined operations involving the cookie data file to identify a selected operation; perform the selected operation on data stored in the cookie data file corresponding to the cookie name; update the cookie data file with an output of the selected operation; transmit a HTTP request message; and transmit the updated cookie data file.