Superflat.tj is a 100% vanilla Java survival server set on a classic superflat world, always running the latest stable release of Minecraft. The community is mostly adults, mainly players over 20 and many over 25, with a mix of folks from the United States plus a few Russian and Polish speakers too.
The rules are simple: treat people with respect, and don't intentionally lag or crash the server. Outside of that, pretty much anything goes. There's no hand-holding here, and you're fully responsible for protecting your own house and valuables, so be careful who you trust.
The server stays strictly vanilla with no mods, plugins, or datapacks. The only extras come from a custom Node.js wrapper that adds a few silly quality-of-life commands for multiplayer, like!sethome and!home for one saved base,!tpa to request a teleport, and!reset to jump to a fresh, unexplored village and start over.
If you want the other little commands too, check the commands page. Everything added through the wrapper is meant to stay cosmetic and light, keeping the server close to pure vanilla while still making it easier to play with other people.