Postman logs detailed information on every single API request you make through its tool, including query parameters. If you use the templating syntax `{{some_secret}}` to fill in a query parameter, it sends the actual secret content of `some_secret` to Postman's servers. If you disable outgoing network traffic to this logging endpoint, the entire app will stop working properly.
I discovered this when investigating whether Postman is HIPAA-compliant (it is not).
My main point was that I wouldn't want my secrets to ever be sent to Postman under any circumstance (or alternately, stop calling them "secret"). A lot of the online responses were some variation of "why are you sending secrets in query parameters in the first place?" (I'm not). When I posted on Reddit, it escalated to targeted harassment by people who were obviously current/former employees at Postman.
I did send out an email blast to a bunch of CIOs/CSOs in my network which went a bit "email viral" through forwarding, and this ended up triggering a substantial amount of enterprise cancellations.
I am still dumbfounded what value Postman can make in capturing all the publics usage. Sure they could mine the data, but they cant exactly use it in any legal way so why bother ?
I discovered this when investigating whether Postman is HIPAA-compliant (it is not).