Hey ​@Mudupuri!

Currently Session policies are not supported via API.  This is an existing feature request listed as “Future Consideration.”  The best way to handle this is clone an existing policy with the session permissions you want to have, then after cloning, you can adjust all other required functions via API including rep permissions, memberships, jump item roles, jump groups, and other settings.  

Some customers have created a few group policies that ONLY have the session permissions they want and nothing else, then just copy those.  Once copied, they can rename, adjust via API to speed up the process vs creating everything, then manually going in and setting session permissions.