Guides

Unstable SMP Guides

Everything needed to connect to the public server at unstablesmp.io on Minecraft Java Edition.

Updated

Unstable SMP is a public survival multiplayer server. There is no whitelist and no application - if you have a legitimate Minecraft account you can join straight away. These five guides cover the address, supported versions, joining step by step, and what to do when a connection fails.

All Unstable SMP guides

Start Here

How to Join Unstable SMP

The single page that walks through connecting to unstablesmp.io from start to finish.

Open guide Quick Answer

Server IP, Port, and Version

unstablesmp.io, the supported version, slot count and how to verify the address.

View connection details Java Edition

How to Join Unstable SMP on Java

Multiplayer, Add Server, enter the address, join. Plus launcher and authentication fixes.

Read Java guide Troubleshooting

Connection Troubleshooting

Fix "Failed to connect", stale saved servers, version mismatch and account problems.

Fix connection issues Community

Discord Guide

Join https://discord.gg/unstable-network for announcements, support, events and appeals.

Read Discord guide

Quick Answer

Official IP: unstablesmp.io for Minecraft Java Edition. No port needed. Discord: https://discord.gg/unstable-network.

Server IPunstablesmp.io Java EditionHow to join DiscordOfficial server profile