Go fill it.
We're onboarding a group at a time so we can support each build properly. Tell us what you're making and we'll send a key.
The browser sandbox is open to everyone. try it without a key →
Ask Claude to fill it. Genji is an MCP server that drops a living crowd into whatever you're building. No assets, no rigging, no Blender.
You're vibe coding a game. The mechanics work. The streets are bare. One prompt later, a hundred people are walking through them.
Add it once and your agent can fill a scene from inside the conversation. Claude Code, Cursor, anything that speaks MCP. Or plain REST if you'd rather hold the wheel yourself.
See it before you wire it. Drag the odds, reshuffle the seed, spin the camera: a live glimpse of your world in the browser. No account, no install, no key.
A curated library of garments, faces and hair. Every piece is built on one shared skeleton, so any part fits any body. Mix them and the combinations run into the millions.
You can prompt your way to a working game loop in an afternoon. Then you hit the wall nobody warns you about: it's empty. Characters mean modelling, rigging, texturing, animating: the one part an LLM can't hand you. Genji is that part, delivered the same way everything else is: you ask, it appears.
Add the Genji MCP server once. From then on your agent can browse the library, compose a crowd and wire it in without you leaving the conversation. No downloads, no import step, no tab switching. It's a tool your assistant already knows how to use.
Every scene below is the same character set with a different mix, a different formation and a different seed. Change the odds, change the world.
Open the sandbox and your world is right there in the browser. Drag the odds (more merchants, fewer guards), reshuffle the seed, spin the camera, watch it recompose live. It's the glimpse you need before you commit a line of code.
When it looks right, take the seed with you. The API returns that exact crowd, forever.
Every garment, face and hairstyle is built on the same rig, so any piece fits any body without a single manual adjustment. That's the whole trick: a curated library where nothing needs fitting, and every combination is already valid.
Which is why the numbers get silly fast. Five hundred outfits against the faces and hair is millions of unique people, and you'll never see the same one twice in a crowd unless you ask for it.
Prototyping in the browser is one thing. Shipping is another. Export a production-ready GLB (rigged, dressed, animation-ready) and drop it straight into your engine. Same crowd, same seed, no cleanup.
Crowd size is unlimited on every plan. You're billed on monthly crowd operations, not how many people are in the scene.
Prices in USD. Billed monthly, cancel anytime.
Yes. Anything you compose and export is yours to use, including on paid plans that remove the watermark. Crowd size is unlimited on every plan. Pricing is based on monthly API operations, not how many characters are in a crowd.
The editor runs entirely in the browser. Exported crowds come back as GLB assets with per-character transforms, so they drop into Unity, Three.js, or any engine that can load a GLB. No proprietary format.
Every layout, terrain, and character type, with saved and shareable crowds, plus 1 API key and a monthly allowance of crowd operations to try the API. Assets are watermarked / limited on Free. Upgrade to Creator for clean assets and a much larger monthly quota.
Yes. Genji ships an MCP server, so tools like Claude and Cursor can list, fetch, and save your crowds directly as part of a conversation, no separate script required.
No. Compose and simulate crowds directly in the browser at any time. Nothing to download for the editor itself. The API and MCP server are for pulling a crowd into your own project.
We're onboarding a group at a time so we can support each build properly. Tell us what you're making and we'll send a key.