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ModSeeker

ModSeeker

Your server your policy. Detect player mods, block unwanted ones, and control which launchers can join

1.1Kdownloads
7followers
1.1Kdownloads
7followers

Compatibility

Minecraft: Java Edition

26.1.x
1.21.x

Platforms

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Details

Published 11 months ago
Updated 5 days ago

ModSeeker — Your server, your policy. Paper plugin for mod and launcher checks.

Wiki · Commands · Source · Report an issue

ModSeeker is a Paper plugin for checking players' mods and launchers. It works with Hidder to block unwanted mods, check approved mod files, and apply optional launcher restrictions when players join your server.

Stacked mod files

Mod detection

Block mods by ID, or allow only approved mod files. Checks include mods declared inside other mod JARs.

 Client verification

Client & launcher detection

Choose which detected launchers can join, and whether to accept unknown launchers.
Hidder client mod

Hidder is required

Java players need the Hidder build for their Minecraft version, together with Fabric Loader and Fabric API. Hidder supports Windows x64.

Get Hidder on Modrinth →

Features

Feature Description
Mod list viewing Inspect a player's reported mods.
Mod blacklist Block unwanted mods by ID.
Hash allowlist Approve specific mod files in advanced mode.
Launcher restrictions Choose which detected launchers can join.
Signed reports Mod reports are signed and encrypted during verification.
Web panel Manage your blacklist or allowlist in a browser.
Discord alerts Get updates on joins, mod reports, violations and verification failures.
Player whitelist Let selected players bypass verification.
Floodgate support Optionally bypass verification for Bedrock players identified by Floodgate.

In action

Block a mod in the web panel and enforce the rule when the player reconnects.

A player joins, the server displays their mod report, an admin updates the blacklist in the web panel, and the player is rejected on reconnect.

Compatibility

Paper server family ModSeeker build
1.21.x Java 21
26.x Java 25

Install ModSeeker on the Paper server and Hidder on the players' clients. The Windows x64 requirement applies to Hidder, not to the server.

Getting started

  1. Download the ModSeeker build for your server's Java version and put it in plugins/.
  2. Have Java players install the matching Hidder, Fabric Loader and Fabric API versions.
  3. Start the server, then choose your rules in plugins/ModSeeker/config.yml. Mod-ID checks are enabled by default; launcher verification is optional.
  4. Run /modseeker reload after configuration changes. To open the web panel, run modseeker gui in the server console and follow the printed link.

Commands require operator permissions by default. You can grant modseeker.admin or individual command permissions to trusted staff. The GUI command is console-only, and its expiring access link should stay private.

Mod lists are logged to the console by default; set showModList: false to turn that off. Use /modseeker seek mod <player> to inspect an online player's cached report.

For commands, policy examples, remote panel access and troubleshooting, see the ModSeeker Wiki. Hidder's documentation explains what the client reports to the server.

Licence

AGPL-3.0-or-later · Third-party licences