GrimAnticheat/Grim

Health v2 · maintenance only

Adoption not part of the score

1724 stars · 636 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

GrimAC is an open-source Minecraft anticheat plugin that detects cheats by simulating real client movement with fully asynchronous, multithreaded checks running on Netty threads. It supports Minecraft Java Edition 1.8 through the latest versions on Spigot, Paper, Folia, and Fabric servers.

Use cases

• stop cheaters on my minecraft server
• detect reach hacks and killaura
• block speed and timer cheats
• anticheat that doesn't cause server lag
• protect a paper or folia server from movement cheats
• open source anticheat for minecraft 1.8 through latest
• reduce false positives for bedrock players via geyser

When to choose

• you run a Spigot, Paper, Folia, or Fabric Minecraft server and need precise, low-overhead cheat detection
• you want an open-source anticheat with movement simulation rather than heuristic checks
• your server supports multiple Minecraft versions from 1.8 to the latest release
• you need lag compensation and low false positives for latency or inventory interactions

When to avoid

• you need Bedrock/Geyser player checks - Geyser players are fully exempt
• you want heuristic or behavioral cheat detection - that is planned for the paid premium version
• you run ViaVersion on your proxy rather than the backend server
• your server runs on Java below version 17

Facets

plugin · maturity active

security monitoring middleware gaming-tools security developer-tools jvm self-hosted anticheat movement-simulation bukkit-plugin paper-plugin fabric-mod spigot folia netty cheat-detection minecraft

Member repositories

For agents

markdown · JSON · MCP: product_card(name="GrimAnticheat/Grim")