OptCarpetAddition
by OptiJava
OptCarpetAddition is a Fabric server add-on that extends the Carpet mod with additional server commands and rules.
What it does
OptCarpetAddition works as an extension of Carpet, so Carpet must be installed alongside it on Fabric. Only the server operator needs the mod, and players join a server running it without installing anything. The source is released under the CC0 1.0 Universal license and is open source. Files target game versions 1.17 – 1.21.10 across 16 release versions.
The latest Fabric file is v2.0.0 for 1.21.10, published on 2026-02-12. Earlier files cover 1.17, 1.18, 1.19 and 1.20 builds. The author asks users to avoid the jar files with the -source suffix, since those are development files. Builds for other game versions may behave differently, so the author asks users to proceed with caution and to report bugs through the GitHub issue tracker.
Public links exist for the source code and the issue tracker. The mod was first published on 2022-11-22 and was last updated on 2026-02-12.
Key features
Carpet extension
Adds extra behavior on top of the Carpet mod, which provides the rules and commands this add-on builds on.
Per-minor-version builds
Each supported minor release has its own build, so a server picks the file that matches its game version.
Bug reporting channel
Problems are reported through the GitHub issue tracker, where the author reads reports from users.
Source access
The source code is published in a public repository, so server owners can read what the add-on changes.
Compatibility
Latest build for each game version and loader.
1.21.x3 of 3 versions with builds
1.20.x3 of 3 versions with builds
1.19.x5 of 5 versions with builds
1.18.x3 of 3 versions with builds
1.17.x2 of 2 versions with builds
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 1
How it compares
Carpet Addons Not Found is also a Fabric server-side mod, open source under the MIT License, with files for 1.17.1 – 1.21.11. Carpet JankAddons runs on the server under Fabric and is open source under the MIT License, covering 1.16.5 – 1.18.2. Carpet Nukos Addition is open source under the Apache License 2.0 and was built for 1.20 – 1.20.1 only. REMS-Carpet-Addition is not open source, uses a custom license, and works on either side, and neither needs it.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| OptCarpetAddition | Fabric | 1.17 – 1.21.10 | Server-side only | 2026-02-12 |
| Carpet Addons Not Found | Fabric | 1.17.1 – 1.21.11 | Server-side only | 2026-01-16 |
| Carpet JankAddons | Fabric | 1.16.5 – 1.18.2 | Server-side only | 2022-03-29 |
| Carpet Nukos Addition | Fabric | 1.20 – 1.20.1 | Server-side only | 2025-05-27 |
| REMS-Carpet-Addition | Fabric | 1.19.4 – 26.3 | Client or server, optional | 2026-10-12 |
Questions
Does OptCarpetAddition need Carpet installed?
Does a player need the mod to join a server running it?
Which game version should a server use?
In the catalog
OptCarpetAddition is one of 3,545 Optimization mods on ModsFinder, and one of 2,575 Optimization mods for Fabric. 15,569 mods support Minecraft 1.21.10.
Similar mods
What the author says
WARNING: Don't download mod jar files with the -source suffix, it is just for development!!! Most other MC versions that are the same as the supported major versions but have different minor versions can be directly installed and work properly, but the stability cannot be guaranteed. Please use them with caution.
Official listing
- Modrinth page
- modrinth.com/mod/opt-carpet-addition
- Owner
- OptiJava
- Published
- 2022-11-22
- Updated on Modrinth
- 2026-02-12
- Facts verified
- 2026-10-15