Polymer
Library for creating better server side content!
About this Mod
Polymer
It's a library for creating server side content, that work for player's without mods or (required) resource packs!
You can create blocks, items and entities, that not only will work fully on server side (and singleplayer), but also
are represented on server the same as normal (vanilla/modded) ones (unlike bukkit/spigot ones, that are stored as vanilla block).
This library also should work correctly with other, non-polymer mods and PolyMC!
For players:
This library/mod includes few small utilities that can be useful for playing on servers using Polymer.
Few things it does on the client:
- Added compatibility to multiple client side mods (EMI, Just Enough Items, Roughly Enough Items, WTHIT, Jade, AppleSkin)
- Correct information on F3 debug screen
- Full support for Polymer item picking
- Creative item tabs synced with server
- Fixes for server resource pack while using Canvas or Iris
For server owners/mod pack makers:
Any mod using this library shouldn't be required on the client side! However, as stated above, there
are few small quality of life things added with it. So you might want to recommend it or include with
your mod pack.
If you have a server and polymer based mods you are using include a resource pack, you might want since version 0.2.5
"packed/all" version of polymer contains AutoHost module, allowing you to setup automatic building and sending of packs
to clients.
If you use 1.18.x or older, use this instead: https://github.com/aws404/polypack-host
For mod developers:
All information about usage can be found at https://polymer.pb4.eu!
What this library/mod doesn't do
This mod doesn't convert existing mods to server side ones. While it's possible to do so with manual coding,
for that you might want to use PolyMC as long as you don't
need to use regular mods on the client (for example with a modpack).
Commands
/polymer- Display about/polymer creative- Opens list of Polymer/Server-Side creative tabs (Available to anyone with creative)/polymer generate- Generates polymer resourcepack as<server/client directory>/polymer-resourcepack.zip
Download
Check list of known mods using Polymer
Available Versions
How to Install Polymer 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 (26.2).
Install Mod
Open the mod browser in the dashboard and search for "Polymer". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
26.2, 26.2-rc-2, 26.1.2 (+60 more)
Server-side
✓ RequiredRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
Polymer 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 (26.2). You can switch loaders with one click in the panel.
Is Polymer compatible with fabric and quilt?
Polymer officially supports fabric, quilt for Minecraft 26.2, 26.2-rc-2, 26.1.2. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with Polymer – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Polymer 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.
Similar Mods
Rent Modded Server
Install Polymer with just one click on your server.