antics-mcp

Multiplayer for your game, in one prompt. An MCP server

that lets an AI agent generate a web game and deploy it to a playable multiplayer URL —

rooms, live state sync, and leaderboards — inside a single conversation.

AI can write a whole game — a single HTML file or a multi-file project — but it can't stand up

a server, so everything it builds is single-player. `antics-mcp` is the missing piece: your

agent writes the game, calls one tool, and hands you back a link your friends can open. No

backend, no player accounts.

→ antics.gg · full API in one file: antics.gg/llms.txt

Install

Claude Code:

claude mcp add antics -- npx -y antics-mcp

Claude Desktop / Cursor / any MCP client — add to your MCP config

(`claude_desktop_config.json`, Cursor's `mcp.json`, etc.):

{
  "mcpServers": {
    "antics": {
      "command": "npx",
      "args": ["-y", "antics-mcp"]
    }
  }
}

Then just ask: *“Make a 2-player game and deploy it.”* The agent writes it, calls `deploy_game`,

and returns a playable URL — no copy-paste, no site visit, no login.

Tools

`deploy_game` works without any login — it returns an ephemeral, keyless URL you can share

immediately (rooms hold 8 players and last 24h). To persist links + leaderboards and raise the

limits, sign in once with `npx antics-cli login` (GitHub), then the owner-scoped tools unlock and

`deploy_game` can target a project.

How the multiplayer works

Your agent doesn't need to know any of this up front — antics.gg/llms.txt

is the complete API in one file, written so an LLM can integrate it one-shot. In brief: a game

calls `joinRoom({})`, shared room state is host-authoritative with per-player slices, writes

coalesce to ~20 Hz, and a leaderboard is one `submitScore()` call. The deployed game runs at a

`/r/` URL with an invite link + QR built in.

Links

• Site: https://antics.gg
• Docs / API reference: https://antics.gg/docs · https://antics.gg/llms.txt
• Try a demo (no install): the four games on antics.gg were each generated

one-shot from the docs.