Hi I'm trying to tackle this bug (https://bugs.launchpad.net/climate/+bug/1304435). The options that I'm considering are: 1 - Add the project_id query parameter to the leases API 2 - Use the X_PROJECT_ID header I prefer the first option, but I would like to know if there is a general OpenStack approach for implementing this. BTW, I'm planning to apply the same criteria for making queries for Domains. Pablo.