About uSkyBlock
From HangarOpen-source Skyblock plugin for Paper and Spigot. Island progression, challenges, and deep customization - since 2013.
uSkyBlock is an open-source Skyblock plugin for Paper and Spigot.
Start on a small floating island, build it into something thriving, complete challenges, and team up with other players to push your island further.
Why uSkyBlock
uSkyBlock gives you a complete Skyblock foundation with island progression, deep customization, and a maintained open-source codebase you can build on long term.
Complete Skyblock gameplay. Build your server around islands, progression, challenges, and party play.
Deep customization. Shape the experience with focused configuration including challenge design, biome options, custom islands, and more.
Integrates with your server. Extend uSkyBlock through its public API and placeholder support so it fits cleanly into your server.
Open source with proven lineage. uSkyBlock is fully open source under GPLv3, free to run, and backed by more than a decade of project history.
Maintained for modern servers. Continues to evolve for current Paper and Spigot versions, with new features, docs, support, and maintenance.
International by default. Support international player communities with bundled translations into 53 languages.
Project links
- Homepage and documentation: https://uskyblock.github.io/
- Source code and releases: https://github.com/uskyblock/uSkyBlock
- Issue tracker: https://github.com/uskyblock/uSkyBlock/issues
Documentation
Detailed documentation is available on the official site, including guides for Players, Admins, Developers, and Contributors.
Support and bug reports
We welcome any feedback, suggestions, and bug reports on GitHub:
https://github.com/uskyblock/uSkyBlock/issues
When reporting a problem, please include your server version (/version), uSkyBlock version (/usb version), relevant logs, and clear reproduction steps.
Highlights
From source dataGame versions
Supports 24 Minecraft versions, the newest being 26.3.
Loaders
Runs on Paper.
Footprint
Rated a light load on a server.
uSkyBlock on Nxeon
From our catalogue- One-click install
- Supported on Nxeon Minecraft servers, for Paper servers. We download it from Hangar, place it, and restart the server.
- Server side
- Required on the server
- Server type needed
- Paper
- Server load
- light
- Smallest plan we suggest
- Minecraft — 2 GB (2 GB RAM). This follows our own load rating above, not a benchmark.
- Latest build
- 3.7.1, released 2026-10-25
Game versions by loader
| Loader | Game versions | Newest |
|---|---|---|
| Paper | 1.21.10 to 26.3 (7 versions) | 26.3 |
From 7 recorded builds of uSkyBlock.
Recent builds
| Build | Released | Game versions | Loaders |
|---|---|---|---|
| 3.7.1 | 2026-10-25 | 1.21.10 to 26.3 (7 versions) | Paper |
| 3.7.0 | 2026-10-25 | 1.21.10 to 26.3 (7 versions) | Paper |
| 3.6.1 | 2026-08-18 | 1.21.10 to 26.3 (7 versions) | Paper |
| 3.6.0 | 2026-07-15 | 1.21.10 to 26.2 (6 versions) | Paper |
| 3.5.0 | 2026-06-19 | 1.21.10 to 26.1.2 (5 versions) | Paper |
| 3.4.2 | 2026-03-29 | 1.21.10 to 26.1.2 (5 versions) | Paper |
Run uSkyBlock on a Minecraft server
Pick a server or deploy a new one above; it is installed in one click.
What kind of mod it is
From the catalogMaps & scenarios
Custom maps, arenas and scenarios to play on.
Runs on your server
From source side supportHangar lists uSkyBlock as required on the server. Check its Hangar page to see whether players need it too.
Compatibility
- Game
- Minecraft
- Loaders
- Paper
- Runs on
- Serverrequired on the server
- Game versions
- 26.3 and 23 earlier
- Requires
- One-click install needs a Paper server.
Verified at the source
- ✓HangarOfficial listing, checked 2026-10-26Open ↗
- ✓AuthoruSkyBlock, as published on Hangar
- ✓LicenseGPLFree
