
About the mod
Astro Sync is an auto modpack updater mod that uses github to do so.
The use case
My server has mods that I'm still testing and haven't published yet, so common launchers won't include them in the modpack download. With Astro Sync I can ensure players get the latest version of my unreleased mods to play on the server automatically, removing the need to share files or Google Drive links.
How it works
It has a config file where you setup the github repository. All players that will download the server modpack need to have its config. Once a player starts Minecraft with the config and the mod installed, it will check with github if the mods have updates and if yes, will automatically download it and warn the player a new version was installed, requiring it to restart the game to apply changes. After this the player is good to go! If the server owner updates the repository with a new version, it will be automatically installed when the game is loaded again!
Warning!
Since this mod download files from github and puts it in your Minecraft folder, only use it with SERVERS YOU TRUST, as the server owner can put ANY file to run into your Minecraft installation. Saves and Resourcepacks folders are blocked to be changed by the mod. Astro Sync was designed to help updating and downloading mods for servers, however be extremely careful if someone else tells you to download it.
- Edition: Minecraft Java
- File type: .jar
- Minecraft version listed: 1.21.11
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
- Ships as astrosync-3.0.0.jar — drop this file into the mods folder
- Download size: 35 KB
- Download link checked 6 Sept 2026 — working
These come from our own check of the pack file, not from the source page.