Reversi MCP App

What it does

Reversi MCP App embeds a full Reversi (Othello) board game inside any MCP Apps-compatible client. The game board is rendered as an interactive HTML UI via the ui:// resource protocol. Crucially, all rule logic executes inside the MCP server — not in the AI's context — making it structurally difficult for the AI to break or bend the rules of the game.

The user plays black; the AI plays white. Moves are made by clicking the board UI, and the AI responds with its best placement each turn.

Key features

• Cheat-resistant rules — Reversi logic runs server-side; AI has no direct access to rule execution
• Interactive board UI — Vue 3 rendered HTML delivered over ui:// resource, click-to-place for user moves
• Public hosted demo — Cloudflare Workers deployment available immediately, no local setup required
• Multi-client support — Works via mcp-remote (OAuth clients) or native streamable-http (Goose, Avatar-Shell)
• Standard MCP Apps spec — Compliant with @modelcontextprotocol/ext-apps for future client compatibility

Installation

Claude Desktop (public server):

{
  "mcpServers": {
    "reversi": {
      "command": "npx",
      "args": ["mcp-remote", "https://reversi-mcp-apps.daisycodes.workers.dev/mcp"]
    }
  }
}

Goose / Avatar-Shell / non-OAuth clients:

{
  "mcpServers": {
    "reversi": {
      "type": "streamable-http",
      "url": "https://reversi-mcp-apps.daisycodes.workers.dev/mcp"
    }
  }
}

Local (Wrangler dev):

pnpm install && pnpm run dev

Then point your client at http://localhost:8787/mcp.

Supported hosts

Confirmed: Claude Desktop (Windows), Goose. Likely compatible with any MCP Apps-supporting client.