Hi @techrahul95 ,
I assume you’re asking about the “Try-Me” in PubSub+ Manager. If so, no it can’t set user defined headers. Maybe one of these 2 options will work for you?
CLI tool - sdkperf : This is a very flexible messaging CLI tool that has been in use by Solace users for 10+ years now. Example commands: Example Commands for SDKPerf Browser based - Angular Solace Message Client (Thanks @GreenRover !). Click on the “Try Me” button in the README to see it in action: GitHub - solacecommunity/angular-solace-message-client: Angular message client to communicate with a Solace messaging broker for sending and receiving messages using the native SMF protocol over web socket. Hope that helps!