Sync Client Server (SCS)
by Maeiro
Sync Client Server (SCS) lets a server owner keep the mods and configuration files on every player's client matched to one server-provided modpack.
What it does
Players join a server and SCS compares their mods folder and config folder against the ZIP archives the server publishes, then offers an Update button in the multiplayer server list. A confirmation screen summarizes the changes before anything is applied, and a clear cache option is available. Only the mods that were changed need a game restart, and the cache is kept separately for each server.
The mod is aimed at server management, where version mismatches and manual mod installs are a common source of connection problems. Synchronization is identified by modId, so duplicated or outdated copies of a mod are replaced rather than loaded alongside the new one. The server can also remove specific client mods, and it can ship only chosen mods or configs instead of a full set. A built-in lightweight file server hosts the mods.zip and config.zip archives on a configurable port, and the mod is released under the MIT License, so the source is open source.
Installation runs on the client and the server, so both sides need SCS. The server also needs an external web server, because SCS does not host files by itself beyond its lightweight built-in file server. The mod is published for Fabric, Forge and NeoForge for 1.20.1 and 1.21.1, with the latest Fabric build at v1.1.1+fabric-mc1.20.1 and the latest Forge build at 1.1.4.
Key features
Update button in the server list
The multiplayer server list gets an Update button that checks the server's published files and applies them.
Update summary before install
A confirmation screen lists what will change, and a clear cache option removes stored data when needed.
Optional config and mirror modes
Configuration sync can be turned on or off, and a mirror mode forces the client folders to match the ZIP files exactly.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
How it compares
Simple Mod Sync (SMS) is open source under the MIT License, works on Fabric, NeoForge and Quilt for 1.21.1 – 26.3, and is optional on either side. Sakura Updater uses the GNU Lesser General Public License v3.0 only and runs on both client and server for 1.20.1 – 1.21.11. Minimap Sync is open source under the MIT License, targets Fabric and Quilt for 1.18.2 – 1.21.1, and also runs on both sides.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Sync Client Server (SCS) | Fabric, Forge and NeoForge | 1.20.1 – 1.21.1 | Client and server | 2026-02-22 |
| Simple Mod Sync (SMS) | Fabric, NeoForge and Quilt | 1.21.1 – 26.3 | Client or server, optional | 2026-09-16 |
| Sakura Updater | Forge and NeoForge | 1.20.1 – 1.21.11 | Client and server | 2026-09-25 |
| Minimap Sync | Fabric and Quilt | 1.18.2 – 1.21.1 | Client and server | 2024-09-22 |
Questions
Does the server need an external web server?
Does Sync Client Server work on both Fabric and NeoForge?
Do players have to install SCS to join?
In the catalog
Sync Client Server (SCS) is one of 8,016 Management mods on ModsFinder, and one of 5,930 Management mods for Fabric. 32,366 mods support Minecraft 1.21.1.
More from Maeiro
Similar mods
What the author says
Sync Client Server (SCS) is a mod designed to keep client mods and configurations synchronized with a server-provided modpack, reducing version mismatches and manual mod management. The client workflow is intentionally minimal.
Official listing
- Modrinth page
- modrinth.com/mod/sync-client-server-scs
- Owner
- Maeiro
- Published
- 2026-02-06
- Updated on Modrinth
- 2026-02-22
- Facts verified
- 2026-10-15