So this is a addon that lets you easily change your fov, The actual fov changing part is 100% clientside, so you don’t need a server.
But if you do run a server, it adds !fov and /fov as fov changing commands.
You can type ‘changefov’ in console to actually change it.
(There’s some more info, like screenshots on the WS page below)
Click the image down here to get it: