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Nimbus AntiCheat

spigotmc.org

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Spec score 7.5 #22 of 53 in Minecraft anti-cheat plugins

What it is

Nimbus AntiCheat is a free plugin for detecting cheats on Minecraft servers. Its movement prediction and packet inspection power 43 individually configurable checks across movement, combat, world, packet, and inventory categories. The checks account for conditions such as latency, server lag, movement buffs, teleports, knockback, flight toggles, and join grace. Detection and staff alerts are enabled by default; operators configure punishments before they are used. Available actions include configurable commands, kicks, temporary or permanent bans, freezes, setbacks, and cancellation of illegal actions. Staff tools include player reports, an inspection GUI, in-game check controls, violation logs, and commands for testing alerts and punishments. PacketEvents is required; PlaceholderAPI, Discord webhooks, Citizens, LiteBans, and a permissions plugin are optional integrations. Nimbus requires Java 21 and targets Paper 1.21.x; it was built and tested against Paper 1.21.8, while other 1.21.x builds are untested. It supports Java-edition players, not Bedrock or Geyser players.

Spec sheet

Purpose
Nimbus is a standalone anticheat for Minecraft servers that uses movement prediction and packet inspection to detect cheats.Read 29 Sep 2026 · spigotmc.org
Intended users
The setup guidance is for server operators who can observe alerts, calibrate checks, test enforcement, and then enable punishments when ready.Read 29 Sep 2026 · spigotmc.org
Integrations
The listing names PacketEvents as required and PlaceholderAPI, Discord webhooks, Citizens, LiteBans, and LuckPerms or another permissions plugin as optional integrations.Read 29 Sep 2026 · spigotmc.org
Support
The maker directs bug reports, false positive reports, and feature requests to Discord or the SpigotMC Discussion tab rather than reviews.Read 29 Sep 2026 · spigotmc.org
Founded
2016Read 28 Sep 2026 · spigotmc.org
Compatibility limit
Bedrock and Geyser players are not supported, and the listing says older versions such as 1.8 and 1.20 are unsupported.Read 29 Sep 2026 · spigotmc.org
Detection
The listing describes 43 individually toggleable and tunable checks across movement, combat, world, packet, and inventory categories.Read 29 Sep 2026 · spigotmc.org
Enforcement defaults
Detection and staff alerts are active by default, while punishments are disabled until configured.Read 29 Sep 2026 · spigotmc.org
False positive handling
The plugin accounts for latency, server lag, movement buffs, teleports, knockback, flight toggles, and join grace when evaluating checks.Read 29 Sep 2026 · spigotmc.org
Requirements
Nimbus targets Paper 1.21.x, was built and tested against Paper 1.21.8, requires Java 21 and the standalone PacketEvents plugin, and supports Java-edition players.Read 29 Sep 2026 · spigotmc.org
Staff tools
It includes player reports, a staff inspection GUI, in-game check controls, violation logs, and alert and punishment test commands.Read 29 Sep 2026 · spigotmc.org

Plans and prices

Free Free 43 checks · Paper 1.21.8 support · Per-check punishments · Player reports and staff inspection tools · Discord webhook notifications Read 19 Sep 2026 · spigotmc.org
Nimbus AntiCheat Free Paper 1.21.8 (compatible forks may work) · Java 21 · PacketEvents required · Java-edition players only Read 29 Sep 2026 · spigotmc.org

Every Nimbus AntiCheat plan and price →

Strong points and limits

Strong points

  • 43 individually toggleable and tunable checks
  • Latency and server-lag factors are considered
  • Staff reports, inspection GUI, and violation logs
  • Configurable alerts, bans, freezes, and setbacks

Limits

  • Requires Java 21 and PacketEvents
  • Bedrock and Geyser players are unsupported
  • Older versions such as 1.8 and 1.20 are unsupported
  • Other 1.21.x builds are untested

Who it suits

It suits Paper server operators prepared to monitor alerts, tune checks, test enforcement, and enable punishments when ready. Operators need Java 21 and PacketEvents, and should use Java-edition players on supported 1.21.x servers.

Verdict

Nimbus offers configurable detection and staff tools at no cost. Its supported server versions and Java-edition-only player compatibility are important setup constraints.

Where Specifiction places it

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