Hopper

Hopper downloads plugin dependencies from Hangar, Modrinth, SpigotMC, and GitHub Releases at runtime so you don't need to shade them.

48 Downloads

java-agentlibrary

Rent Server with this Mod

About this Mod

Hopper
Plugin Dependency Loader for Minecraft Servers

Hopper downloads plugin dependencies from Hangar, Modrinth, SpigotMC, and GitHub Releases at runtime so you don't need to shade them.

Features:
Download from Hangar, Modrinth, SpigotMC, GitHub, or direct URLs
Smart version resolution with exact, minimum, or range constraints
Auto-load plugins at runtime without server restart
Auto-detects server platform (Folia, Paper, Spigot, Velocity, etc.)
Auto-detects Minecraft version for dependency filtering
Lockfile support for reproducible builds
Multi-plugin coordination with shared dependencies
Minimal footprint - uses only JDK built-ins

Supported Platforms: Bukkit, Spigot, Paper, Purpur, Folia, Velocity, BungeeCord, Waterfall

Available Versions

1.4.0release

MC 1.19, 1.19.1, 1.19.2, 1.19.3, 1.19.4, 1.20, 1.20.1, 1.20.2, 1.20.3, 1.20.4, 1.20.5, 1.20.6, 1.21, 1.21.1, 1.21.2, 1.21.3, 1.21.4, 1.21.5, 1.21.6, 1.21.7, 1.21.8, 1.21.9, 1.21.10, 1.21.11java-agent

December 28, 2025

How to Install Hopper on Your Server

Order Server

Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).

Set java-agent Loader

In the panel under "Egg", select the java-agent loader and matching Minecraft version (1.21.11).

Install Mod

Open the mod browser in the dashboard and search for "Hopper". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.

Compatibility

Mod Loaders

java-agent

Minecraft Versions

1.21.11, 1.21.10, 1.21.9 (+21 more)

Server-side

✓ Required

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

Hopper server crashes on startup – what to do?

Most common cause: wrong java-agent 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 Hopper compatible with java-agent?

Hopper officially supports java-agent for Minecraft 1.21.11, 1.21.10, 1.21.9. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with Hopper – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Hopper 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.