Minecraft: Your Server, Your Magic
Paste one prompt. Get a server your friends can join tonight — plus a wand that shoots fireballs and a boss mob you invented. No mods to download, no Java degree needed.
Renting a Minecraft server is easy. Making it YOURS is the hard part — custom content normally means mod loaders, Java tutorials, and forum threads from 2014. Not here. This is a Minecraft AI server: your Pocketcorp comes with an AI that codes, living on the same machine as the game. Tell it what should exist: a wand that throws fireballs? A frost boss that stalks the night and drops diamonds? Say it, and it’s in the world minutes later. Your friends join with completely normal Minecraft — nothing to install on their side.
Hermes lives on your server, right next to Minecraft. You say what should exist in the game — it writes the Java, builds the plugin, loads it into the running world and reads the log when something breaks. And its learning loop means the third plugin ships faster than the first: every build teaches it your server.
First: flip on auto-approval
The agent asks your permission for every privileged command — normally a feature, but during setup you don’t want to click approve twenty times. Before you paste the prompt, open your server dashboard and enable “Auto-approve requests” behind the bell icon in the top right:
Once the server is up, you can switch it off again — then every privileged command waits for your click, like before.
Start Here: One Prompt
Copy this prompt and send it to the agent on your Pocketcorp. It sets up everything in this guide and reports back when it’s done. The steps below explain what your agent is doing — and how to check its work.
Set up a Minecraft server on this machine and add my first custom
magic.
1. Install Java 21 (openjdk-21-jre-headless). In ~/minecraft,
download the newest stable Paper build — get the version and
build number from the PaperMC API
(https://api.papermc.io/v2/projects/paper), never guess the URL.
Accept the EULA.
2. Run the server as a systemd service with 2–3 GB of RAM so it
survives reboots.
3. IMPORTANT, before anything else: turn the whitelist ON and add my
Minecraft name: <YourMinecraftName>. Then tell me the address my
friends will join (this server’s IP, port 25565).
4. Install the PlugManX plugin so we can reload plugins without
kicking anyone.
5. Create a plugin called ArcaneCraft — a Gradle project in
~/minecraft/plugins-src, built against the Paper API matching our
server version — with:
a) /wand — gives me the “Arcane Wand” (a blaze rod with a glowing
name). Right-click: shoots a fireball that cannot break
blocks. Sneak + right-click: lightning where I’m looking.
3-second cooldown so it can’t be spammed.
b) The Frost King — a rare boss: a zombie with a custom name over
its head, 60 health, full iron armor, a slowness aura around
it, spawning at most once per night near a random player, and
dropping 3 diamonds when defeated.
6. Build it, put the jar in plugins/, load it with PlugManX, and
show me the log lines proving it loaded with zero errors.
7. Wait while I test in game — then ask me what we invent next.The Stack
Send the prompt, watch it build
The prompt above does the whole boring part: Java, the Paper server (the fast one every serious server runs), a service that restarts after reboots, and your first plugin — compiled from Java the agent writes while you watch. Your part takes five minutes — deploy, paste, done. The agent needs ten-ish more on its own, most of it downloads.
Will it run well? Yes: the €15 base plan (4 GB RAM, €12 billed annually) comfortably runs a Paper server for a friend group. If you go heavy-modpack later or your Discord grows past ~15 players, switch to the High Performance plan — your world files just stay where they are.
Friends in, randoms out
The prompt turns the whitelist on before the server is reachable, and that order matters: bots scan for open Minecraft servers around the clock, and an unprotected world gets found in minutes. Adding friends is one line each:
whitelist add Steve_your_friend
whitelist add Alex_your_other_friendShare the address only after the whitelist is on. With it on, the open port is safe — that’s its job. Without it, you’re hosting a public server whether you meant to or not.
Test your magic
Join the server, type /wand, and try both spells. Then do the thing this whole setup exists for — change the magic while the server is running:
The fireball is awesome. Can the lightning also freeze water where it strikes?
Done — rebuilt and reloaded with PlugManX, nobody got kicked. Lightning now turns water to ice in a 3-block radius for 10 seconds. Try it on the lake by your spawn.
That loop — say it, test it 30 seconds later, while your friends are online — is what a Pocketcorp adds over a normal game host. The server, the code and the AI live on one machine. Yours.
Make the Frost King yours
The Frost King from the prompt is a starting point. Describe what players should SEE and FEEL — the agent translates it into code:
When the Frost King drops below half health, he should summon two zombie minions and the sky should flash.
Added — at 30 health he roars (thunder sound), lightning flashes without damage, and two “Frozen Servant” zombies spawn at his side. Reloaded; a Frost King will spawn tonight. Log is clean.
You never need to say “use an EntityDeathEvent”. Describe the moment like you’d describe it to a friend — “he explodes into snow when he dies” — and let the agent pick the code. That’s its half of the deal.
Never lose the world
Your world will soon hold months of your friends’ builds. Two sentences to your agent protect all of it:
“Back up the world folders every night at 5:00 and keep the last 7.
Once a week, check if there’s a newer Paper build for our version —
tell me what changed before you update anything.”That’s the entire operation: a whitelisted server, magic no other server has, nightly backups, and an AI that reads Minecraft changelogs so you never have to.
What you end up with
A server with your name on the door and spells nobody else has — friends playing on it tonight, new ideas going live between rounds, and a world that gets backed up while you sleep.
More stories to build
Frequently asked questions
What is a Minecraft AI server?
A Minecraft server with an AI agent living on the same machine. The agent sets the server up, keeps it running, and — the real difference — writes custom plugins on request while you play: you describe a wand, a boss, or a minigame in plain language and it codes, builds and hot-loads the plugin into the running world.
Can AI run a Minecraft server?
Yes. On a Pocketcorp the AI installs Java and Paper, configures the whitelist, runs the server as a systemd service that survives reboots, watches the logs, and fixes what breaks — you talk to it in chat instead of reading tutorials.
Can the AI write Minecraft plugins and mods?
It writes real server-side Paper plugins in Java — compiled against your exact server version and loaded without kicking anyone. Because the content is server-side, nobody needs to install mods.
Do my friends need mods to join?
No. All custom content runs on the server, so friends join with completely normal vanilla Minecraft — just the server address.
How much does a Minecraft AI server cost?
The Base Pocketcorp starts with a 14-day free trial, then €15/month — or €12/month billed annually — server and AI agent included. The agent works on prepaid tokens you top up, so there are never surprise API bills.