Before installing a plugin, use the official website to confirm that the plugin supports your server software and Minecraft version.
What is GrimAC?
Open-source predictive anti-cheat focused on movement and combat checks. MSH lists it as a mainstream option in Anti-Cheat , but the official project documentation remains the source of truth for exact builds, dependencies and current compatibility.
| Developer / maintainer | GrimAC team |
|---|---|
| Category | Anti-Cheat |
| Pricing | Free |
| Typical platform | Paper-family servers |
| Primary use | Open-source predictive anti-cheat focused on movement and combat checks. |
What it is good at
- Packet-based anti-cheat checks
- Open-source development
- Modern server/proxy ecosystem support with Bedrock-aware handling options
What types of servers should consider it?
- Competitive PvP servers
- Public servers that want a transparent open-source anti-cheat
Pricing and distribution
The plugin is distributed as a free option. Check the official page for the current download source and license.
What to check before using it
- No anti-cheat is a substitute for staff review. Tune alerts and test legitimate movement/latency before aggressive punishments.
Also check the plugin's current dependency list, migration notes and supported server versions on the official page before changing a production server.
Common questions
What does GrimAC do?
Open-source predictive anti-cheat focused on movement and combat checks.
Is GrimAC a plugin or a mod?
GrimAC is listed here because it is used as a server plugin in its supported plugin environment. Some projects also publish builds for other platforms; use the official download page to choose the correct platform build.
Do players need to install it?
Most server plugins run server-side and do not require players to install the same JAR. Features that rely on resource packs, Bedrock bridges or optional client integrations can still change what the player must download or accept.
How do I install it?
For a supported Bukkit/Paper release, download the correct official plugin JAR, place it in the server plugins/ directory and fully restart; follow project-specific instructions for other platforms. Install the compatible anti-cheat build and begin with alert review rather than automatic punishment; document movement-related plugins such as launch pads or custom flight.
How do I know the plugin loaded?
Check the startup console and logs/latest.log, then confirm the plugin loaded on its supported server platform. Next verify an actual feature rather than relying only on the plugin list: Check that a staff account receives detection information while a legitimate player tests sprinting, elytra and high-latency movement. Compare results before enabling bans.
What if it does not load?
If the plugin failed at startup, inspect the first relevant log error for a missing dependency, incompatible Java/server version or wrong artifact. If it loaded but its feature fails: A sudden burst of detections after an update can indicate protocol or movement compatibility, not necessarily cheating. Reproduce on a test server and review the official supported-version list.
For general plugin installation, read How to Install Plugins on a Minecraft Server. To understand the plugin lifecycle and how plugins differ from mods, read How Minecraft Server Plugins Work. If the plugin refuses to load, use Plugin Failed to Load.
Alternatives
References
Plugin versions, pricing and platform support can change. These project pages were used as the primary references for this overview.
Related MSH pages
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