Community Tip - Did you know you can set a signature that will be added to all your posts? Set it here! X
i am also attaching a screenshot.
Soumyodeep, you can use the appkey to authenticate to access the mashup something like this :
http://ThingWorxServer>:<ThingWorxPort>/Thingworx/Mashups/<YourMashupName>?appKey=<YourAppKeyHere>&x-thingworx-session=true
You'll need to ensure that the appKey has enough rights to access that mashup