📄️ Passwordless API
YOURLS allows API calls the old fashioned way, using username and password parameters (if your setup is private, obviously).
📄️ Proxy
YOURLS features proxy support, meaning that you can install it behind a firewall or a proxy, and hopefully use it without any limitation.
📄️ Public shortening
Tips and must-do things if you run a public shortening interface.
📄️ Custom protocols
YOURLS can shorten URLs with non standard protocols (other than http or https).