Turning sync off isn’t possible but we added the notion of Sessions in a previous release that enables you to store sensitive information (API keys, tokens, etc) as environment variables that aren’t synced.
- Sessions FAQ – Sessions FAQ | Postman Blog
- The RFC – https://community.postman.com/t/sessions-in-postman/1925
tl;dr – Store your sensitive data within the Current Values field in the environment template so that it isn’t synced.
