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Mod Observer PluginMinecraft plugin for 1.21.11

Plugin that lets the server manage mods used by the players.

server onlynewest supported 1.21.11UtilityManagementSocial
Latest version
2.1.1
Minecraft
1.20 to 1.21.11
Java
Java 21+
Platforms
Spigot, Purpur, Paper
Licence
MIT
Downloads
1.8k
Updated
12 mo ago
Available on
Modrinth
Space NodeOur hosting

Host Mod Observer Plugin servers

One click and Mod Observer Plugin is installed on a Paper or Purpur server built for it.

  • 1.21.11
  • Spigot
  • Purpur
  • Paper
  • One click plugin install
  • Paper and Purpur ready
  • Automatic updates
  • NVMe SSD
Deploy a serverFrom €0.90 per GB

Minecraft versions

Every version Mod Observer Plugin declares support for, newest first, with the Java runtime that version needs.

Other plugins
MinecraftThroughJavaEvidenceReleased
1.21.11Spigot, Purpur, Paper21+declared9 Dec 2025
1.21.10Paper, Spigot, Purpur21+declared7 Oct 2025
1.21.9Purpur, Spigot, Paper21+declared30 Sept 2025
1.21.8Purpur, Spigot, Paper21+declared17 Jul 2025
1.21.7Spigot, Purpur, Paper21+declared30 Jun 2025
1.21.6Spigot, Purpur, Paper21+declared17 Jun 2025
1.21.5Paper, Spigot, Purpur21+declared25 Mar 2025
1.21.4Purpur, Spigot, Paper21+declared3 Dec 2024
1.21.3Spigot, Paper, Purpur21+declared23 Oct 2024
1.21.2Purpur, Paper, Spigot21+declared22 Oct 2024
1.21.1Spigot, Purpur, Paper21+declared8 Aug 2024
1.21Paper, Spigot, Purpur21+declared13 Jun 2024
1.20.6Purpur, Spigot, Paper21+declared29 Apr 2024
1.20.5Purpur, Spigot, Paper21+declared23 Apr 2024
1.20.4Purpur, Spigot, Paper17+declared7 Dec 2023
1.20.3Purpur, Spigot, Paper17+declared4 Dec 2023
1.20.2Purpur, Spigot, Paper17+declared20 Sept 2023
1.20.1Purpur, Spigot, Paper17+declared12 Jun 2023
1.20Purpur, Spigot, Paper17+declared2 Jun 2023

Download

From Mod Observer Plugin’s own host. Nothing is re-hosted here.

2.1.1release2 Oct 2025

ModObserverPlugin-2.1.1+mc1.20.x+.jar · 48 KB · for 1.20.6, 1.20.5, 1.20.4, 1.20.3, 1.20.2 +2 more

Download latest
fea8d285b365…
Older versions6
  • 3.0.120 Aug 20251.21.11, 1.21.10, 1.21.9, 1.21.8, 1.21.744 KB763 downloadsf87c1e2e7fe2…Get
  • 3.0.018 Aug 20251.21.8, 1.21.743 KB55 downloadse537ff6dc7c0…Get
  • 2.1.018 Jul 20251.21.6, 1.21.5, 1.21.4, 1.21.3, 1.21.2 +2 more47 KB81 downloads11bba18ab20e…Get
  • 2.0.113 Jan 20251.21.3, 1.21.2, 1.21.1, 1.2147 KB161 downloads931421eea55e…Get
  • 2.0.019 Nov 20241.21.3, 1.21.2, 1.21.1, 1.2147 KB94 downloads44761b9293be…Get
  • 1.0.04 Jul 20241.20.6, 1.20.5, 1.20.4, 1.20.3, 1.20.2 +2 more46 KB162 downloads00c321348f82…Get

Frequently asked

Does Mod Observer Plugin work on Minecraft 1.21.11?

Yes. 1.21.11 is the newest Minecraft version Mod Observer Plugin declares support for, and the claim comes from the author's own release metadata rather than from a compatibility list somebody maintains by hand.

Which Minecraft versions does Mod Observer Plugin support?

Everything the author has declared, from 1.20 up to 1.21.11. The full list is in the table above, with the Java runtime each version needs next to it.

Do I need to install Mod Observer Plugin on the client or the server?

The server only. Players join with an ordinary Minecraft client and install nothing.

Which platform or loader does Mod Observer Plugin support?

Spigot, Purpur, Paper. A build for one platform or loader will not necessarily load on another, so this is the first thing to check before the Minecraft version.

Which Java version do I need for Mod Observer Plugin?

On the newest Minecraft version it supports, Java 21 or newer. The requirement comes from the Minecraft version you run rather than from the plugin itself, so on an older supported Minecraft the answer is that version's Java, not this one.

What licence is Mod Observer Plugin under?

MIT, as stated by the author on the platform we synced it from. Check the project's own page before redistributing or bundling it.

How do I install Mod Observer Plugin?

Choose the release variant for your server platform. Paper, Spigot, Purpur and Bukkit files go in the server's plugins folder; Fabric, Forge, NeoForge and Quilt files go in the mods folder. Restart after installing and check that the Minecraft version matches your server.

Where do I download Mod Observer Plugin safely?

Start with the author's page on Modrinth, which is where the data here is synced from. MCReference does not host or repackage files. The download link goes to the source recorded for that release; verify the publisher, filename and checksum before running it.

Works on the same versions

Ordered by how much of the recent Minecraft version coverage overlaps, not by popularity.

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Last checked 2 mo ago against Modrinth. We do not host files and we do not republish descriptions; every download link points at the author’s own release.

Is this information wrong or missing something? .