Server IP: play.toxigon.com
Toxigon Anarchy is a pretty straight up vanilla anarchy server in the Toxigon world. If you want unfiltered, uninhibited Minecraft with minimal commands and no hand holding, this is the kind of place where you just log in and figure things out for yourself.
The server stays on the newest Minecraft version, the map never resets, and there is no moderation. The owner does not join in, so the world is basically left to run on its own, which fits the whole anarchy vibe.
Voting is rewarded too, but kept simple so it still feels vanilla. Instead of keys, crates, or custom items, you get a random vanilla item as a vote reward, even stuff you would normally only see from console or creative. No custom gimmicks, just plain Minecraft.