ValiMod
by gaberd
ValiMod is a Fabric server security tool that checks connecting clients against the mods and resource packs the server requires.
What it does
During the connection handshake, ValiMod compares each joining client with the server's rules. It checks the client's mod list, mod version numbers, the active resource pack and SHA-1 hashes, so clients that have unauthorized client-side changes or lack required mods can be stopped before they play. Enforcement can be tuned, and a warning mode logs violations without kicking anyone, which suits auditing a player base before turning kicks on.
ValiMod is client and server software: the server runs it to enforce requirements, and every player on a protected server has to run it too so the handshake can complete. It is published for Fabric only, across three release versions, 1.20.4 – 1.20.6, with 1.0.0 for 1.20.6 as the latest alpha file. The code is released under the MIT License, but the project is not open source in the usual sense of a public repository workflow. It has no dependencies beyond the loader itself.
Key features
Automated handshake
Each connecting client is checked during the handshake against the mods, versions and resource pack the server requires.
Anti-bypass protection
Connections that stall or skip the handshake are removed automatically once a 10-second timeout passes.
Clickable kick messages
Disconnect notices are styled, and an optional clickable link points players to the missing file.
Hot-reload configuration
Configuration files reload with the valimod reload command, so changes apply without restarting the server.
Warning mode
Setting enforceKicks to false logs violations without kicking players, letting administrators check clients first.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Who it’s for: Server owners who run a modded server and want connecting clients checked against a required mod list and resource pack. Players on protected servers need the mod as well.
How it compares
ModGuard is Fabric, client and server, under the MIT License, and is not open source, with files for 1.20.4 only. SerendiModGuarder is also Fabric, client and server, but is open source under the GNU General Public License v3.0 only and covers 1.20.6 – 26.3. ModVerifier covers 26.1 – 26.1.2 under a non-commercial Creative Commons license, so it fits a different version window and license than ValiMod.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| ValiMod | Fabric | 1.20.4 – 1.20.6 | Client and server | 2026-07-25 |
| ModGuard | Fabric | 1.20.4 | Client and server | 2026-03-06 |
| SerendiModGuarder | Fabric | 1.20.6 – 26.3 | Client and server | 2026-10-04 |
| ModVerifier | Fabric | 26.1 – 26.1.2 | Client and server | 2026-05-31 |
Questions
Does ValiMod need to be installed on every player's client?
Which game versions does ValiMod support?
Can server owners test rules before kicking players?
In the catalog
ValiMod is one of 8,016 Management mods on ModsFinder, and one of 5,930 Management mods for Fabric. 11,154 mods support Minecraft 1.20.6.
More from gaberd
Similar mods
What the author says
ValiMod is an advanced server security and synchronization tool for Fabric that ensures connecting clients match the server's required mod environment. json { "enforceKicks": true, "downloadUrl": " "required_mods": [ "valimod", "fabricloader@>=0.15.0" ], "blacklisted_mods": [ "xray", "freecam" ] }
Official listing
- Modrinth page
- modrinth.com/mod/valimod
- Owner
- gaberd
- Published
- 2026-07-25
- Updated on Modrinth
- 2026-07-25
- Facts verified
- 2026-10-15