The most reliable way to create a multiplayer OneBlock server is to run Minecraft Java Edition on Paper, install a trusted OneBlock plugin, create a separate OneBlock world, and then initialize each player’s island. A plugin install alone is not enough: the world must be generated and the OneBlock starting point must be set before players join.
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You can use a standalone OneBlock plugin, or install AOneBlock as an addon to BentoBox. The first option has fewer moving parts; the BentoBox option provides a deeper island-management framework and editable phase and loot files. This guide covers both paths, including commands, dependencies, configuration, security, testing, and the fixes for common failed loads.
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What a OneBlock server actually does
OneBlock is a SkyBlock-like Minecraft mode in which a player begins on a single block suspended over the void. Breaking that block replaces it with another block, and the sequence gradually unlocks resources, mobs, structures, and new progression phases. The player expands a safe island around the block instead of exploring a normal overworld.
A multiplayer server normally gives every player or team its own protected island. Players can invite teammates, reset an island, and progress independently while sharing the same Paper server. AOneBlock’s project description says one run contains about 12,000 blocks and lists 12 gameplay phases; those are project-page figures that can change as the project is updated.
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There are three separate jobs involved:
- Run the server: Paper provides the Java server software and plugin API.
- Install the game logic: a OneBlock plugin supplies block replacement, phases, island commands, and protection.
- Initialize a world: you create a dedicated world and set the location that acts as the OneBlock starting point.
Keeping those jobs separate makes troubleshooting much easier. A plugin can load correctly while the world is missing, and a world can exist while no OneBlock reference point has been configured.
Choose an implementation
Both supported approaches work on Paper. Select one before copying files, because their folder locations, dependencies, and administration commands differ.
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|---|---|---|---|---|
| Standalone OneBlock plugin | Install the plugin JAR in plugins/; install any dependencies required by its project page first. |
/ob join or /ob |
/ob set, with documented offset and coordinate forms; configure invites, resets, spacing, protection, borders, physics, and progress-bar behavior according to the plugin’s configuration. |
A smaller, simpler installation with fewer framework components. |
| AOneBlock on BentoBox | Install BentoBox first, then place AOneBlock.jar in plugins/BentoBox/addons/. |
/ob |
/oba for administration; phase and loot YAML files allow deeper progression customization. Regeneration is required when documentation says a changed file affects existing worlds. |
Servers that already use BentoBox or need more extensive island and phase control. |
| Server compatibility | The standalone project lists Bukkit, Paper, Purpur, and Spigot compatibility. Always match the plugin’s currently listed Minecraft and server versions rather than assuming a newer Paper build will work. | |||
The standalone project page had recorded 249.8K downloads when it was crawled in 2026. That number indicates usage, not a guarantee that a particular release supports your server version.
Requirements and preparation
Use Java Edition and Paper
These plugin implementations target the Java server ecosystem. Bedrock-only servers cannot load Java Bukkit/Paper plugins. Download a Paper build that matches the Minecraft version named by the OneBlock project, then use the Java runtime version required by that Paper build.
Prepare an isolated test instance
Do not experiment first on a production world. Copy the entire server directory to a separate test folder, including the world folders, plugins/, configuration files, and the server’s startup script. Stop the live server before copying so region files are not being written during the backup.
- Keep a dated backup before installing a new plugin or changing phase and loot data.
- Reserve a dedicated world name such as
OneBlock; do not reuse the ordinary survival world. - Make sure you can read
logs/latest.logand have console access. - Download only from the plugin’s official Modrinth or CurseForge project page, or another repository you already trust.
Paper’s documentation warns that plugins receive “full and unrestricted access to not only your server but also the machine that it runs on.” Treat a plugin JAR like executable server software: verify its source, restrict operating-system permissions, and remove files you cannot identify.
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Install and start the Paper server
- Create a server directory. Put the Paper JAR, startup script, and server files in a folder dedicated to this Minecraft instance.
- Start Paper once. The first launch creates configuration files and stops when it needs you to accept the Minecraft EULA. Open
eula.txt, review the terms, and change only the EULA setting required to accept them. - Start again and confirm a clean boot. Wait for the console to report that the server is ready. Stop it with the console’s normal stop command before adding plugins.
- Check the version. Record the Minecraft version and Paper build. Compare those values with the OneBlock project’s supported versions before downloading anything.
- Back up the empty server. This gives you a clean rollback point if a plugin changes generated files or creates an incompatible configuration.
If the server does not reach a ready state before plugin installation, fix the Paper or Java problem first. A OneBlock plugin cannot correct a server that is already failing during startup.
Option A: install the standalone OneBlock plugin
1. Download and place the JAR
Stop the test server. Download the standalone plugin release from its project page and keep the original filename so it is easy to identify later. Put the JAR directly in the server’s plugins/ folder, not in a nested folder. Install every dependency listed by that release before starting Paper; dependency order matters when one plugin provides services another plugin needs.
2. Restart and verify the load
Start Paper and run /plugins from the console or as an operator. A green entry means Paper loaded the plugin. A red entry means it failed and should be treated as an installation problem, not as permission to continue creating worlds.
Read logs/latest.log after every failed load. Look for the first error involving the OneBlock plugin; later stack traces are often consequences of that initial failure.
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3. Create a dedicated OneBlock world
The project’s documented example uses:
/mv create OneBlock normal -g OneblockThis creates a world named OneBlock with the OneBlock generator. The /mv command must be available in your server; if it is not, install the trusted world-management dependency that supplies that command, following its own version requirements. Do not run the command in the normal survival world unless you intentionally want to replace that world’s generator behavior.
4. Set the reference block
Stand at the location where the first block should appear and run:
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/ob setThe plugin also documents optional offset and coordinate forms. Use those when the OneBlock block must be placed at a precise location rather than where you are standing. Record the coordinates in your server notes so you can reproduce the setup after a reset.
5. Test player entry
With an ordinary test account, run /ob join or /ob. Confirm that the player receives an island, appears at the intended height, can break the active block, and cannot fall into or build outside another player’s protected area. Test a second account before inviting real players.
Option B: install AOneBlock on BentoBox
1. Install BentoBox first
Stop Paper and install the BentoBox plugin in the normal plugins/ directory. Start and stop the server once so BentoBox creates its folders, then stop it again before adding the addon. Installing the addon before BentoBox exists will leave AOneBlock without its required framework.
2. Add AOneBlock to the addon directory
Place AOneBlock.jar in:
plugins/BentoBox/addons/Do not put this JAR beside ordinary plugins in plugins/; AOneBlock is loaded by BentoBox as an addon. Confirm that the AOneBlock release supports your Minecraft and Paper versions.
3. Restart and inspect the log
Start Paper and run /plugins. BentoBox and its AOneBlock addon should load without an exception. If either component is missing, read logs/latest.log before changing files. A missing BentoBox dependency, an incompatible server version, an invalid JAR, or a duplicate plugin name are common causes of a failed load.
4. Create and join an island
Use /ob as a player to open the OneBlock flow. Use /oba for administration. Follow the addon prompts to create an island and verify that the block, protection, and progression appear in the intended world.
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5. Edit phases and loot safely
AOneBlock exposes phase and loot YAML files for customization. Stop the server before editing them; never modify YAML while Paper is writing it. Preserve indentation, make one logical change at a time, and keep the original file in your backup. Some changes affect only newly generated islands. When the documentation requires regeneration, remove or regenerate the affected test world rather than expecting an existing island to rebuild itself automatically.
Configure the multiplayer experience
Island creation and invites
Decide whether a player starts an island immediately on first join or must use a command. Test the invite flow with two accounts: the owner creates an island, invites the second account, and the invited player accepts. Check that a player cannot join two islands at once and that removing a member does not grant access to another island.
Reset behavior
Define who may reset an island and what a reset destroys. A reset can remove inventories, chests, farms, and progress, so require confirmation if the plugin provides it and take a backup before testing administrative reset commands. Test both an owner reset and a staff-initiated reset.
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Spacing, borders, and protection
Set enough distance between islands that bridges, entity cramming, and accidental block placement cannot cross into a neighbor’s area. Verify these boundaries at the edge of an island, at the maximum build height, and below the island. Check that containers, doors, redstone, and mobs obey the same ownership rules as ordinary blocks.
Physics and progression displays
OneBlock gameplay depends on predictable block replacement. Test sand and gravel, fluids, redstone, falling entities, explosions, and fire; physics settings that are harmless in a normal world can destroy a small void island. If the plugin provides a progress bar or boss-bar display, confirm that it updates after each break and remains readable when multiple players are online.
World access and spawn
Keep the OneBlock world separate from the server lobby and survival worlds. Set a safe spawn or portal route, then test death, re-entry, and teleportation. A player who dies in the void should return to a valid island location or a controlled spawn, not remain trapped in a repeated fall loop.
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Use a short acceptance test instead of relying on a single successful login:
- Join with a new account and create an island.
- Break the active block repeatedly and confirm replacement and phase progress.
- Place storage, a workbench, a farm, and redstone; verify that each survives the next block cycle.
- Invite a second account, have both players break blocks, and verify ownership permissions.
- Leave and rejoin from the server list; confirm the player returns to the same island.
- Reset the test island and verify that the reset scope matches your warning to players.
- Attempt to reach a neighbor’s island and the void; protection and borders should stop both paths.
- Restart Paper and repeat the join test to catch data that was never saved.
Only after this test should you copy the configuration to the production instance. Keep the test world until the first production update has been stable.
Troubleshooting failed installs
| Symptom | Likely cause | What to do |
|---|---|---|
The plugin is absent from /plugins. |
The JAR is in the wrong directory, has an invalid filename, or Paper rejected it before registration. | Stop the server, place the standalone JAR directly in plugins/ or AOneBlock in plugins/BentoBox/addons/, then restart and inspect logs/latest.log. |
| The entry is red. | Missing dependency, unsupported Minecraft/Paper version, malformed JAR, or a startup exception. | Read the first related error in logs/latest.log. Install the named dependency, use a matching release, or replace the download with a trusted copy. |
/mv create OneBlock normal -g Oneblock is unknown. |
The world-management plugin that supplies /mv is not installed or did not load. |
Install and verify that dependency, or use the world-creation method documented by your selected OneBlock project. |
| The world exists but no OneBlock appears. | The generator was not selected, or the OneBlock reference point was never initialized. | Confirm the world was created with the OneBlock generator and run /ob set at the intended coordinates. |
| AOneBlock commands are missing. | BentoBox did not load, or AOneBlock.jar is outside the addon directory. |
Stop Paper, verify both JAR locations, check version compatibility, and restart. Do not move files while the server is running. |
| Players can enter another island. | Protection, island spacing, or world-border settings are too permissive. | Test the boundary with a non-owner account, tighten protection and spacing, and restart if the plugin requires a reload. |
| Edited phases or loot do nothing. | The file was edited while the server was running, YAML formatting is invalid, or existing worlds retain generated data. | Restore the backup, edit while stopped, validate indentation, then regenerate the affected test world when the addon documentation requires it. |
| The server stops during startup after an update. | Version incompatibility, duplicate plugin names, or a corrupted download. | Roll back to the dated backup, remove the new JAR, read the log, and upgrade Paper and the plugin only as a matched set. |
Security, updates, and operations
Trust every plugin file
Paper’s unrestricted plugin access means a malicious or compromised JAR could read files, open network connections, or alter the operating system account running the server. Download from the project’s official page, keep the server account unprivileged, avoid running the process as an administrator, and do not install “fix” JARs posted in random chat messages.
Back up data that matters
Back up the OneBlock world, player data, plugin configuration, and BentoBox or standalone-plugin data before updates and resets. A world-only backup may not preserve island ownership if that information is stored in plugin data. Test at least one restore on a non-production copy so you know which folders are required.
Update deliberately
Read the release notes for Paper and the OneBlock project before updating. Confirm the supported Minecraft version, make a backup, update the test instance first, and review logs/latest.log. Do not assume that a plugin marked compatible with Bukkit will support every Paper build without testing.
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Check disk space, startup logs, crash reports, and backup completion. A full disk can prevent island data from saving even though players can still connect. Keep the server’s operating system and Java runtime patched, and restrict console and file access to trusted administrators.
Run it at home or use Minecraft server hosting?
A home computer can run a Paper OneBlock server if its network, power, upload bandwidth, and firewall are reliable. You must keep the machine on, forward the server port safely, apply updates, and perform backups yourself. This is useful for a private group and a test instance.
Minecraft server hosting is more practical when players need continuous access. A host can provide an always-on machine, data-center connectivity, automated backups, and a control panel, but you still remain responsible for plugin compatibility, permissions, and the integrity of downloaded JARs. Before choosing a plan, check that it permits Paper, lets you upload custom plugins, exposes console logs, supports scheduled backups, and allows the Java and Minecraft versions your OneBlock project requires.
Final launch checklist
- Paper runs the Minecraft Java version required by the selected project.
- The plugin came from a trusted source and is in the correct folder.
- All dependencies load green in
/plugins. - The OneBlock world is separate from ordinary survival worlds.
- The generator and
/ob setreference point have both been initialized. - Join, invite, reset, protection, border, physics, and progression behavior passed a two-account test.
- Phase and loot files, if edited, were changed while the server was stopped and tested on a disposable world.
- A restorable backup includes worlds, player data, and plugin data.
- Administrators know where
logs/latest.logis and will read it before replacing files.
Once those checks pass, open the server to players. The standalone plugin is the shortest route to a working OneBlock world; AOneBlock on BentoBox is the better fit when you need its island framework and phase or loot customization. In either case, world initialization, version matching, backups, and log review determine whether the server remains playable after the first restart.
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