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Medusa

Medusa is a free, open-source Spigot plugin for Minecraft server anti-cheat detection and automatic moderation.

Place
#14 of 57
Score
5.8

What Medusa is

Medusa is a free, open-source Spigot plugin for Minecraft server anti-cheat detection and automatic moderation. Heuristic checks cover aimbots, autoclickers, reach, movement anomalies, inventory cheats, protocol violations and behavior anomalies. The maker states that its reach check allows a 0.5-block tolerance and works without client mods. Server operators can configure and customize detections in game, use flexible commands, and connect moderation or punishment systems through a public API and custom commands. Actions include alerts, logs, mitigation and custom commands, with themes for logs and messages. The project targets Minecraft 1.8–1.12.2, while tested major versions are listed as 1.7–1.12; third-party engines may be incompatible. It is GPLv3 licensed. Version 1.5.7, released June 18, 2021, is listed as the last update, and support ended in 2021.

Good

  • Server-side detection needs no client mods
  • Covers multiple cheat and behavior categories
  • In-game configuration and custom commands
  • Public API supports moderation integration
  • Open source under GPLv3

Watch out

  • Compatibility centers on Minecraft 1.8–1.12
  • Third-party server engines may be incompatible
  • Last update was June 18, 2021
  • Support concluded in 2021

Who it suits

Medusa suits operators of compatible Spigot servers who need server-side detection without client mods. It is less suitable when newer versions, third-party engines or ongoing support are required.

Verdict

Medusa offers configurable anti-cheat and moderation tools for older Spigot versions, with API integration and no client installation. Its dated release and ended support should be weighed carefully.

Plans and prices

From Medusa's own pricing page, checked 9 Oct 2026.

All about pricing
PlanPriceWhat it gives you
FreeFreeMinecraft server moderation plugin · Compatible versions: 1.8–1.12

The facts

Each one read from Medusa's own pages, with the date it was checked.

What it does

Client requirements
The maker says Medusa detects cheats without requiring client mods.checked 9 Oct 2026
Configuration
The maker describes in-game configuration tools, customizable detections, and a flexible command system.checked 9 Oct 2026
Detection
It uses heuristic checks to detect cheats including aimbots, autoclickers, and reach exploits.checked 9 Oct 2026
Downloads
The maker reports more than 26,000 downloads; the project listing shows 29,908 total downloads.checked 9 Oct 2026
Installation
The project listing instructs users to download the JAR and place it in the server's plugins folder, and cautions that reloading the plugin may cause problems.checked 9 Oct 2026
Integration
The maker says Medusa includes a public API and supports custom commands for integration with moderation or punishment systems.checked 9 Oct 2026
License
The project listing says Medusa is open source under the GPLv3 license.checked 9 Oct 2026
Performance
The maker says Medusa benchmarked 11.79 times lighter than a leading paid competitor at the time.checked 9 Oct 2026
Purpose
Medusa is a lightweight, server-side Minecraft anti-cheat and automatic moderation system.checked 9 Oct 2026
Reach check
The maker says Medusa's reach check has a 0.5-block tolerance.checked 9 Oct 2026
Release status
The project listing shows version 1.5.7, released June 18, 2021, as its last update.checked 9 Oct 2026
Server compatibility
The project listing describes Medusa as a Spigot plugin for Minecraft versions 1.8–1.12.2 and says third-party server engines may be incompatible.checked 9 Oct 2026
Support
The maker says support concluded in 2021 after more than 80 user tickets were resolved via Discord.checked 9 Oct 2026
Themes
Medusa includes a theme system for logs and messages.checked 9 Oct 2026

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