Bruno is pretty decent, though I don’t like that it’s not fully FOSS. The whole premium feature stuff is closed source, if I’m not mistaken.

I’ve been searching for alternatives as well, especially since Insomnia introduced mandatory account creation.

I think Yaak is pretty good and I recently found out about Voiden, though I haven’t had a chance to try it out yet.

Edit: I forgot to mention that if you’re using IntelliJ Ultimate for what you’re doing, it has a built-in HTTP client too. We use that a lot at work, because then you can have the requests directly together with your application’s source code inside your repository, which is kinda handy.

Did you test your gluetun setup manually and made sure it generally works (e.g. by setting up another container that is connected to gluetun, go into the shell and try to ping a public service, that you’re sure isn’t blocking requests from VPN users)?

If it does work and only qBittorrent can’t connect, it could be due to the trackers blocking VPN users. I’m not torrenting but I’ve read about that in the past.

Yubikeys. I have 2 of them and both have the same entries in case one breaks.