Client Functions
Execute your own functions on the fly without data packs and external tools
Screenshots
About this Mod
Client Functions (Fabric)
This mod allows players with sufficient permissions to execute bundles of commands(functions) on the fly without data packs. The default keybind for opening the GUI is B but you can change it. All functions you execute will be saved in a history. You can browse it in the GUI via the arrow buttons or via CTRL + SCROLL WHEEL. In the config file or the Mod Menu integration you can choose how you want your history to be saved.
Dependencies
This mod requires Fabric API and Cloth Config API. Additionally, you can install Mod Menu if you want more configuration. Alternatively, you can just modify the config file clientfunctions.json5 inside .minecraft/config.
Server and client
In order for this to work on dedicated servers the mod is required to be on it too.
GUI
There's also a scroll bar!
Idea
Credit goes to SnaveSutit for commissioning the mod!
Available Versions
How to Install Client Functions on Your Server
Order Server
Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).
Set fabric Loader
In the panel under "Egg", select the fabric loader and matching Minecraft version (1.21.1).
Install Mod
Open the mod browser in the dashboard and search for "Client Functions". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
1.21.1, 1.21, 1.20.6 (+14 more)
Server-side
✓ RequiredRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
Client Functions server crashes on startup – what to do?
Most common cause: wrong fabric version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.21.1). You can switch loaders with one click in the panel.
Is Client Functions compatible with fabric?
Client Functions officially supports fabric for Minecraft 1.21.1, 1.21, 1.20.6. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with Client Functions – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Client Functions consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.
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