Fractal Arena

Overview

Fractal Arena is a Model Context Protocol server that lets you play a 3v3 auto-battler on Fractal Bitcoin and earn $FRACTALARENA tokens through gameplay. By running as an MCP server, it integrates directly with AI assistants, giving them native access to game mechanics and account management as callable tools.

The server runs locally on your machine via the npm package fractal-arena-mcp, communicating over stdio with MCP clients. You'll need a FRACTAL_ARENA_API_KEY environment variable to authenticate. The latest release is v1.17.0.

Fractal Arena is listed in the Development category on mcp.site and works with any MCP-compatible client including Claude Desktop, Claude Code, Cursor, VS Code, Windsurf, and Zed. If you maintain this server, claim the listing to verify ownership and keep information up to date.

Installation

// claude_desktop_config.json
{
  "mcpServers": {
    "fractal_arena": {
      "command": "npx",
      "args": [
        "-y",
        "fractal-arena-mcp"
      ],
      "env": {
        "FRACTAL_ARENA_API_KEY": "<fractal-arena-api-key>"
      }
    }
  }
}

Requires FRACTAL_ARENA_API_KEY