pizauth
last updated: Oct 30, 2025
https://github.com/ltratt/pizauth
https://tratt.net/laurie/src/pizauth/
pizauth is a simple program for requesting, showing, and refreshing OAuth2 access tokens. pizauth is formed of two components: a persistent server which interacts with the user to request tokens, and refreshes them as necessary; and a command-line interface which can be used by programs such as fdm and msmtp to authenticate with OAuth2.
Might be useful the next time I dive in to OAuth waters, haven't tried it yet