Introducing 67js A 3D engine that any AI agent can drive, through 23 MCP tools (and counting) It's open source, so you can use it right away

repo here and docs at

i'd love people to contribute to this young but ambitious project, contribution guide here

A useful reliability test would be: ask the agent to change one object, then check that the rest of the scene is unchanged. Stable object IDs plus before/after scene diffs would make accidental edits much easier to catch. Do the MCP tools expose that kind of state inspection?

there's a scene_inspect tool that reads the scene state back, so you can run it before and after an edit and compare the two

Open source and ready to use straight away, lovely.

thanks, go break it and tell me what's missing

67js letting any AI agent drive 3D through MCP tools sounds like a fun open breakthrough

thanks, hope you give it a spin and tell me what breaks

Looks great, thank you! How would you describe the benefits to telling Claude something like "make it in threejs"?

thanks! with plain "make it in threejs" the agent writes code and hopes it works, here it calls mcp tools on a scene that is just data (geometry, matrix, material), so it edits things directly, and a lit box is about 2.6x smaller gzipped than three.js

Superb. Can the MCP be hooked up to say GPT-Image-2.6 for scene or character image references, to build close matches?

love the idea, very well done buddy!

thanks duy

Fantastic works 👏 Let me look, interested in adding export format.

thanks peekee, a new export format would be welcome

6 7

lmao 6 7 to you too

can you do one for vulcan or opengl or directx

it's built for the browser so no vulkan or directx for now, noted it though

woah! love this, gonna try it out 🙌

thanks angelo

Giỏi

thanks brother

Damn brotha

thanks jack, glad it landed

@grok how is this related to 3js ?

congrats for the launch!

thanks daniel

3D场景能直接交给Agent操作 这把边界又推远了 开源出来 大家很快能玩出新东西

thanks, can't wait to see what you build with it, tell me which tool is missing

Can we use this alongside three js or this replaces it?

alongside, it's made for agents to drive over mcp tools, not to replace three.js

Is this for real or just another bait post?

real, the engine is public on npm as @codepawlhq/67js, hook it to claude and see for yourself

Haters will see this and refuse to play anything that uses this in any fashion because they were told to hate all things AI and can't think for themselves

haha let them, the work speaks for itself in the end

very cool, i will try it out!

thanks updog

Curious which of the 23 MCP tools agents end up using the most.

haven't counted yet, i should log the calls and see which ones agents lean on

Love it. Going to try to do things with it

thanks brother, let me know what you build

why webgl?

does it bring any optimization compared to three.js or just AI adaptability?

67js is brilliant a 3D engine any AI agent can drive with MCP tools, open source and ready to build with!

23 tools is a lot for an agent to pick from. Does it get a render back after each call, or does it mostly work off the scene graph?

Does it use hella tokens?

haven't measured the tokens yet but will do soon

Phoenix - 1901

know a technical founder running an agent harness that already has MCP connections and a Blender connector. sent you a dm about an intro.

Disgusting 67. Fuck yourself to hell zoomer.

Agents driving 3D scenes directly—this is a wild unlock.

23 个工具听着不少，想看看代理实际搭场景能有多顺手。

With 23 tools, the descriptions are the interface: the model picks by what they say. One habit that helped us: generate the tool docs from the running server, so the docs and what the model actually sees can't drift apart.

1K+ bookmarks means people plan to come back and actually build with it. Shipping 23 MCP tools on day one shows it’s real, not a demo

@loktar00