How to see full value of environment variables via circle CI APIs?

ok, I can embed my environment vars in Context then but I would also require to update one of the vars periodically and I see that update won’t be possible in this case . And from here you stated:Updating context environment variables during build? . Hence, my idea was to Get env vars for project specific and for the one which requires update ,I would delete envvar and then add envvar .

Also as per https://circleci.com/docs/api/#get-single-environment-variable should return the hidden value however this api response also shows “xxxx5151” for a single env to fetch. Is this something known?