Installing the plugin

Drop the jar into plugins, restart, check the console. Which jar to grab and which lines you should see.

3 min

It goes in like any other plugin: jar into plugins, full restart. First make sure your server fits.

What you need

What	Works with
Server	Paper and its forks (Purpur, Pufferfish and the rest), Spigot, Folia. On Folia there are no holograms.
Version	Minecraft 1.16.5 to 1.21.11. Newer ones like 26.x are treated as the latest version it knows, and it runs fine.
Java	17 or newer. There are two builds: one for Java 17 and one for Java 21+.
Other plugins	Nothing extra, PacketEvents is already inside. WorldGuard is optional, for regions where you don’t want checks. Bedrock players (Geyser/Floodgate) aren’t checked.

MLSAC 2.0

Direct download from mlsac.net is coming here soon.

1
Stop the server
2
Drop the jar into plugins/
If MLSAC 1.x was there, delete the old jar.
3
Start the server
The plugin creates plugins/MLSAC/config.yml and a data/ folder. That’s all it writes to disk; everything else lives on the site.
4
Check the console
The MLSAC lines should look like the clip below.

Line	What it means
`MLSAC 2.0 enabled in … ms: Paper 1.21.4 …, Java 21`	The plugin started and recognised your server and version.
`Detection: off (API key default placeholder)`	No key yet. That’s expected on the first start; next you paste the key.
`Detection: on (alert threshold 0.80) \| preset: main`	The key is in, checks are running, and config.yml points at the preset main.
`[Backend] Connected to https://api.mlsac.net`	Connected to the cloud.
`[Preset] Applying preset 'main' (…)`	Your settings from the site are applied.