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Rally Studio for AI apps

Make a multiplayer game with your AI

Describe a game to the AI you already use. It builds it on Rally’s multiplayer engine, playtests it with bots and fixes what breaks, and you share a link anyone can play.

  1. 1Connect your AI

    Add Rally Studio to Claude, ChatGPT or any app that supports MCP. It uses the plan you already pay for.

    Rally Studio’s address

    https://rally.place/api/mcp
    • Claude: Customize › Connectors › Add custom connector, then paste the address. Works on claude.ai and in the desktop app.
    • ChatGPT: Turn on Developer mode in settings, then add a custom MCP server with the address and keep OAuth sign-in.
    • Claude Code, Codex, Cursor, VS Code, Grok…: Any app that supports remote MCP servers over HTTP works. The docs have the exact command or setting for each.

    Step by step for Claude and ChatGPT.

    Sign in to Rally when your app asks, and allow it to read and edit your games. Step-by-step for every app

  2. 2Describe your game

    Say what you want to make. Your AI builds it in Rally Studio, playtests it with bots and fixes what breaks while you watch.

    Start with one of these

    Make a 3D lava-rise obby on Rally for up to 8 players: the lava climbs every 10 seconds, checkpoints every few platforms, and the last one standing wins.

    Make a 2D platformer race on Rally for 4 players with coins, moving platforms and a timer. Show a leaderboard at the end of each round.

    Make a 3D team capture-the-flag game on Rally, red versus blue, with a small castle on each side and respawns after 5 seconds.

    Make a cozy 3D fishing game on Rally where friends fish from a shared dock, rare fish are worth more, and the best catch of the day is shown on a board.

    Or start from a ready-made template. Your AI gives you a Rally Studio link: open it to watch the game being built. What your AI can do in Rally

  3. 3Play it with everyone

    Ask your AI to publish it and share the link. Friends play right in the browser with no account, even inside a post on X.

    Say “publish it” when you’re happy with it (or press Publish in Rally Studio). Your game gets its own page and a link anyone can play. Make it public and it’s listed in Games once a few people have played it.

Open Rally Read the docs

Games people are playing

Questions

Is Rally free?
Yes. Making, publishing and playing games on Rally is free. Your AI app runs on the plan you already have with it, and Rally never asks for your Claude or ChatGPT login.
Do my friends need an account to play?
No. Anyone can play a published game from its link as a guest, right in the browser. Signing in lets them chat in the game and play under their own name.
Which AI apps work with Rally?
Claude (on the web and in the desktop app), ChatGPT with Developer mode, Claude Code, Codex, Cursor, VS Code, Grok, and any other app that supports remote MCP servers.
What kinds of games can I make?
2D and 3D multiplayer games that run in the browser: obbies, racing, shooters, sports, party and strategy games. They run on Rally’s servers, so multiplayer works without you hosting anything.
Can I change the game myself?
Yes. Every game opens in Rally Studio in your browser. You see your AI’s changes live, can edit objects and scripts yourself, and can undo any change.
Who owns the games I make?
You do. You keep ownership of what you make on Rally; publishing a game lets Rally host it and show it to players.