Grace Anticheat

github.com

What it is

Grace is an anticheat for Java Minecraft servers that targets closet cheating and ghost cheating, and also handles blatant hacking.

From github.com's own pages, read 7 Oct 2026.

As github.com lists them, read 7 Oct 2026.

Data plate

Price: Free to use
Free plan: Yes
Free trial: Not stated
Runs on: self-hosted
Open source: No
Website: github.com
Alerts: Grace can alert staff in-game and send formatted embeds to a Discord channel using a webhook.
Compatibility: The standalone listing specifies Paper support for Minecraft Java Edition versions 1.19.x, 1.20.x, and 1.21.x.
Detection: It uses a rules-based detection pipeline and statistical behavioral analysis.
Enforcement: Configuration supports rubber-banding on hard alerts, kicking on action alerts, and optional automatic bans, disabled by default.
Proxy architecture: The proxy setup runs as a Velocity plugin with a Paper companion plugin on the backend server.
Requirements: The proxy setup requires Velocity 3.3.0 or later, Paper 1.19 or later, and Java 21 or later.
Source availability: The API, event pipeline, data model, and companion plugin are open source, while the detection logic, model weights, and threshold tuning are closed source.
Staff tools: Commands provide engine status, player evidence summaries, alert controls, violation history, and configuration reloads.
Checked: 7 Oct 2026

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