
About this Mod
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.
Available Versions
How to Install Astro Sync 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 (1.21.11).
Install Mod
Open the mod browser in the dashboard and search for "Astro Sync". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
1.21.11, 1.20.1, 1.20
Server-side
✗ UnsupportedRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
Astro Sync 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 (1.21.11). You can switch loaders with one click in the panel.
Is Astro Sync compatible with fabric and forge?
Astro Sync officially supports fabric, forge for Minecraft 1.21.11, 1.20.1, 1.20. Note: Forge and Fabric mods are NOT cross-compatible – pick one loader and stick with it. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with Astro Sync – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Astro Sync 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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Rent Modded Server
Install Astro Sync with just one click on your server.