The standard Eaglercraft server (often called “EaglercraftServer.jar”) is based on an old version of Bukkit/BungeeCord. This means it supports plugins – which are a form of server-side mod.
How to install:
Important caveat: Not all Bukkit plugins work. Plugins that rely on modern Minecraft features (1.16+), complex particle effects, or custom entities might crash or do nothing. Stick to simple, command-based plugins (Essentials, WorldEdit, PermissionsEx). can i add mods to eaglercraft
This is where client-side modding gets interesting. Because Eaglercraft runs on JavaScript, you can manipulate the game in real-time using your browser’s Developer Console (F12).
Simple example: Open console and type:
player.setHealth(1000);
Or to give yourself 64 diamonds:
player.inventory.addItem(264, 64);
Is this a “mod”? Technically, yes. It’s a live modification of the game’s code. However, it’s temporary. Refresh the page, and everything resets. To make it permanent, you’d need to save the modified HTML or create a userscript (using Tampermonkey or Greasemonkey) that runs the script every time the game loads. How to install:
The catch: Many public Eaglercraft servers have anti-cheat systems that detect console commands or unusual client behavior. You might get banned on a public server, but on a single-player world or your own server, it’s fine.
The original Eaglercraft project’s source code (Java that compiles to JS) is available on GitHub.
You can: Important caveat: Not all Bukkit plugins work
This is the closest thing to “making a mod” for Eaglercraft, but it requires Java development skills.