We would like to turn off the production version of UMAPI that is running on stat1001 and accessible through metrics.wikimedia.org

As far as I know, everybody who use UMAPI on stat1001 also can access the instance on stat1 (using the SSH tunnel). 

If you are using UMAPI on metrics.wikimedia.org and do not have rights to access UMAPI on stat1 then please let me know. We plan to switch it off by the end of this week.