(And I've spent a nontrivial amount of time to make the SAZ post processor thing to work but after spending an hour or two trying to get compatible versions and python's environment setup, I gave up, installed a Windows VM and made a Fiddler capture...)
edit: Now I feel guilty for a feature request in an announcement post. Thank you for mitmproxy! It's definitely something I use weekly and I very much appreciate the support that Maximilian has given me in various GitHub issues, Slack, etc.