1. A method, comprising: receiving a request to execute one or more transactions with a COBOL application of a mainframe to evaluate one or more mainframe services; automatically generating a script executable by a load testing application in response to the service request, the script to cause the load testing application to convert information associated with the script from a first format to a second format for inclusion in a message to be sent by the load testing application to a send queue in communication with the COBOL application, the first format being compatible with the load testing application and the second format being compatible with the COBOL application; transmitting one or more transactions to a queuing system including the send queue; identifying hexadecimal (hex) data associated with the one or more transactions in the send queue; generating one or more hex files mapping hex data compatible with the COBOL application to hex data compatible with the load testing application, the script being generated based, at least in part, on the one or more hex files; and selectively switching channels between the queuing system and the mainframe on and off to identify the hex data in the send queue.