I am trying to bypass the popup which asks for user credentials like username and password which is normally "Administrator" and "admin". I am not finding any particular solution for this. I need this since I am calling this mashup from .net mvc.

[sshome]

i am also attaching a screenshot.

[supandey]

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