The XWBOPEN exit is invoked during processing of EXEC CICS WEB OPEN and EXEC CICS INVOKE WEBSERVICE commands, the XWBSNDO command is invoked during processing of EXEC CICS WEB SEND commands. These commands are used to make HTTP client requests from CICS® as an HTTP client, which is a facility provided by CICS Web support. For details of these exits, see the CICS Internet Guide.