Command Debug Service
by Jaffe2718
Command Debug Service lets external programs execute Minecraft commands on a server, linked to a debug kit that connects the game to outside tools.
What it does
The service exposes a way for external programs to run Minecraft commands. A developer connects an IDE to the game through the command debug connection kit, so a script opened as a .mcfunction file can be sent for execution while the game is running. The mod opens two socket servers, and the host and port of each are shown in the game chat, where a second socket server can be connected by entering those values.
Installation requires Fabric API on Fabric, and the Quilted Fabric API on Quilt. Once the mod is placed in the mods folder and a world is joined, the sockets start. Code completion and code execution are offered through the service. The mod is server-side only, so players join without installing it. It is published for Fabric and Quilt across 10 release versions, under the MIT License, and the source code is open source. Optional support for MidnightLib is listed.
Key features
Remote command execution
External programs can run Minecraft commands on the server through the mod's execute method.
Socket server pair
The mod creates two socket servers and shows their host and port in the game chat for linking.
Code completion
A code completion service helps write .mcfunction scripts from the IDE while the game is running.
IDE project workflow
Scripts are created and opened as .mcfunction files in an IDE project connected to the running game.
Gallery
Compatibility
Latest build for each game version and loader.
1.21.x3 of 3 versions with builds
1.20.x6 of 6 versions with builds
1.19.x1 of 1 version 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
Optional 1
Use cases
Developing datapack scripts
A developer writes and runs command scripts from an IDE against a live world and sees the results in the game.
Testing command flows
Command sequences can be executed from outside the game during testing, without typing them into chat.
Who it’s for: Datapack authors and developers who want to drive Minecraft commands from an external program, and server owners who run that tooling on their own server.
How it compares
Command Books is server required with an optional client, under the MIT License, for 1.19.4 – 1.21.11 on Fabric. Command Limit Tracer is server-side only, open source under the MIT License, and published for 1.21.11 – 26.1.2 on Fabric. Command Debug Service is server-side only and covers the earlier range on both Fabric and Quilt.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Command Debug Service | Fabric and Quilt | 1.19.4 – 1.21.5 | Server-side only | 2025-04-02 |
| Command Books | Fabric | 1.19.4 – 1.21.11 | Server required, client optional | 2025-12-20 |
| Command Limit Tracer | Fabric | 1.21.11 – 26.1.2 | Server-side only | 2026-06-14 |
Questions
Does Command Debug Service need Fabric API?
Do players have to install Command Debug Service?
Which game versions does Command Debug Service support?
In the catalog
Command Debug Service is one of 8,016 Management mods on ModsFinder, and one of 5,930 Management mods for Fabric. 15,307 mods support Minecraft 1.21.5.
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Official listing
- Modrinth page
- modrinth.com/mod/command-debug-service
- Owner
- Jaffe2718
- Published
- 2023-08-23
- Updated on Modrinth
- 2025-04-02
- Facts verified
- 2026-10-15