Somewhere to start
An empty world, and Cog.
Nothing built yet. Just a place, and someone standing in it waiting to be asked.
Minecraft worlds, hosted
Cubelings is your own Minecraft world with a builder already in it. Tell Cog what you want — a canyon with a waterfall down it, a walk-in house shaped like SpongeBob, a pirate galleon out on the open sea — and they get on with it while you stand there and watch the blocks go down.
Ask them for a game instead and they write one, and it is live in the world you are standing in before you have put your pickaxe away.
Somewhere to start
Nothing built yet. Just a place, and someone standing in it waiting to be asked.
Ask for something
And they go and do it. Not a loading bar — you stand there and watch the blocks go down, one after another, until there is a road where there was grass.
Ask for more
Windows that light up when it gets dark. Water running down the middle of the wheat. Lamps along the road because they thought you would want them.
Ask for something silly
Not a decoration. There is a lever at the bottom. Flip it and the whole thing goes round, and the seats stay level all the way over the top.
And they tell you the truth
When Cog finishes something they go back over it and count. If a wall has a hole in it, they say so. You will never find out three days later that half a bridge is missing.
road 357 columns · 1 piece · 0 holes · 0 stray fence
wheel 92/92 parts · radius 12.000 · gaps < 1 block
lever on → frames advance · off → frozen · cleanThings they have actually made
Nothing below came out of a cupboard. Each one started as one line typed into the chat, and each one is standing in a world right now — every block of it read back out of the world afterwards to check it really is. 126,733 blocks between them, none wrong.
"And I want to go inside it."
24,688 blocks · they walked inside, 14 blocks past the wall
"Cannons run out, flag up top."
30,263 blocks
"Rope bridges between the huts."
35,252 blocks · they walked inside, 22 blocks past the wall
"Wings folded, head up, mouth open."
36,530 blocks
Getting started
Your world is up a few minutes later, with Cog already standing in it. Nothing to install, no server to configure, no router to argue with.
In the chat box, in your own words. "Build a lighthouse on that headland." "Make us a soccer game." they ask if they are not sure, and then they get on with it.
They open the copy of Minecraft they already own and join. No mod, no launcher, no download. However many of them there are, they play free.
Make it yours
It arrives called Cog because something has to be called something. What it really is, is yours — so name it, dress it, and tell it how you want it to behave.
Bramble. Pickle. Your dog. Whatever your world decides. That is the name it answers to in the chat and the name on everything it builds.
Drop in any Minecraft skin and that is who turns up. Same as skinning your own character — no file wrangling, no launcher, and everybody in the world sees it.
Chatty or quiet. Cheeky or straight down the line. Ask before big builds, or just get on with it. It is a setting, not a personality you have to put up with.
Every world gets its own. Two Cubelings worlds have never had to have the same one.
Who it is for
Who wants a pirate ship, and a rollercoaster, and a house shaped like SpongeBob, and does not want to spend a fortnight placing blocks one at a time to find out whether it was a good idea.
Who wants to know who is in the world, what got built, and that somebody sensible is in there — without having to learn what a datapack is or run a server on the family laptop.
Who want one world that is always up, that nobody has to host on their own machine, and that has something new in it every time they log on.
Pricing
One person pays for the world. Everybody they invite joins free, with the game they already own. Cancel whenever you like, and take the whole world with you if you go.
What you can ask for
Not a menu of settings. You say it the way you would say it to a friend, and they go and do it while you watch.
Your world
A Cubelings world does not pause when you log off. It keeps running on an ordinary Minecraft server underneath, so it is exactly where you left it — mid-build, mid-farm — the next time anyone signs in.
Cog lives on the server itself, joining your world as a player, never on a player's machine. Nobody needs to install anything to see them work.
No waiting around
On most servers, adding anything new means everyone gets thrown out while it restarts. Not here. Cog can put a new machine — or a whole new game, with its own rules and its own scoreboard — into the world you are standing in, and the first you know about it is that it is there.
Creative 0/7 · instant Survival 0/7 · they fetch every block
Two ways to play
Ask for a building in creative and it appears, finished, in the time it takes to describe it. Ask for the same thing in survival and they go and earn the materials first — the same rules that apply to you.
Places blocks directly — no gathering, no crafting, no travel time. This is the mode for a village, a road across the map, a ferris wheel that has to actually turn: builds where the point is the finished structure.
Cog gathers, crafts and mines under the same rules you do, and can come back with less than they hoped for. Cog fights when something attacks, retreats when they are hurt, and leaves ore alone when their pickaxe would only destroy it.
Building
A road is not a straight line dropped between two points. The route reads the ground it crosses: it widens at corners so the shoulder does not read as a trench, and bridges water instead of stopping dead at the bank.
Structures are placed to the block, from a description in plain English — no schematic file to prepare, no in-game commands to type.
"cobblestone road from the well to the farm, three wide"
Things that move
Ask for a secret door and you get a real one: sticky pistons, wire and a lever, laid block by block the way you would lay it yourself. Flip the lever and a solid wall slides across the doorway. Flip it back and the doorway is simply there again. It works the first time, and the hundredth.
Getting redstone right is the part that beats everyone. Wiring is fiddly, one wrong block kills the whole circuit, and on an independent benchmark every frontier AI model tested gets it right about a quarter of the time.
So Cog does not work the wiring out on the spot. Cog builds from circuits that have already been made and tested — which is why their lever does what a lever should. See how a circuit gets checked →
Click the pitch to take a shot
New rules, while you are standing in it
Ask for soccer and you do not get a field and a shrug. Cog lays the pitch — markings, centre circle, goal frames in red and blue glass, a pad at each end — and then writes the rules that make it a game. Stand on your team's pad and it hands you snowballs and a bit of speed. Put one through the goal mouth and the score goes up, the whistle goes, and everyone gets told. First to five and the fireworks go off.
Then it goes into the running server. Nobody is kicked, nothing restarts, no plugin gets installed, and your friends carry on playing the ordinary game they already own. The server simply did not know how to play soccer a second and a half ago, and now it does.
Why you can trust them near your world
Anyone can show you a photo of a finished build. When Cog finishes one they walk back over it and count what is actually there — and then tells you, in the chat, in words. Not "done". The numbers they found.
CogRoad's finished. 357 columns, all one connected piece, no holes in it, and nothing along it you can't walk straight up.
CogWheel's up. All 92 parts, and every seat is exactly twelve blocks out from the middle — I measured them rather than trusting the drawing.
CogHouse is done, and you can get inside it — I know because I walked in: sixteen blocks past the wall, standing in the middle of him.
That is the whole difference. You will never find out on Saturday that the bridge you crossed on Tuesday had a gap in the middle of it.
Actual transcript, unedited
go mine me some iron
I'm heading down to mine some iron! Should be back up in a couple minutes with the ore.
what are you up to?
I was just about to head underground to mine iron! Want me to grab anything else while I'm down there?
Done! I mined 1 iron ore from Y:56 and made it back safely — found 4 total but only had room for 1.
The last line arrived on its own, two minutes later.
Cog talks back
Cog is not a command line with extra steps. Cog holds a real conversation, they will follow you if you ask, and they have a personality rather than a script of canned lines.
Ask them for something that takes a while and they say so straight away, then comes back once the job is actually done — not silence, and not a progress bar.
refused
For parents
A refusal does not depend on who is asking or how the request is phrased. Cog will not break someone else's build, they tell you what they did after every job, and anything they build can be undone. A whitelist keeps a family world to exactly the people invited into it.
Early access
We are opening a small number of worlds to begin with. Put your name down and we will tell you when yours is ready — one email, nothing else.
Questions
Plans start at $12 a month for one world with Cog in it, and everybody you invite joins free. You need your own copy of Minecraft Java Edition, the same as you always have. Cancel any time, and you can download your world and keep it.
Yes, and it is built that way on purpose. Cog refuses anything inappropriate no matter who asks, they will not break other people’s builds, and everything they do is written down and can be undone. You decide who is allowed in the world.
That is rather the point. Cog is only the name and face it arrives with — rename it, drop in any Minecraft skin, and set how it behaves. Every world gets its own, and no two have to be alike.
No. Nothing, no mods, no launcher. They open Minecraft the way they always do and join. Cog lives on the server, not on your computer.
No. There is no server to set up, no port forwarding, no config file. You pick a plan, your world appears, and you tell Cog what you want in the chat box, in ordinary words.
A road or a house goes up in seconds while you stand there. Something they have to design from scratch — a dragon, a house shaped like a cartoon character — takes a few minutes of thinking first, and then goes up in seconds. Asking for a second copy of something they have already made takes about three seconds.
they tell you. Cog checks their own work when they finish and say what they found, including when it did not go to plan. And anything they build can be undone.
Only if you want them to. In creative they place things instantly, which is handy when you have asked for a castle. In survival they play by the same rules you do — they have to go and find the wood, and sometimes they come back with less than they hoped.
Minecraft Java Edition today. Hytale is next — it opened up in January 2026 and was built for exactly this kind of thing.