How do I install Fractal Arena?

Copy the stdio config for Cursor, Claude Desktop, Claude Code, or VS Code on this page. It uses the publisher's install, not a PlugMCP proxy.

Does Fractal Arena need an API key?

The publisher lists these environment variables: FRACTAL_ARENA_API_KEY, FRACTAL_ARENA_API_URL.

What transport does Fractal Arena use?

Fractal Arena runs locally over stdio.

Fractal Arena

Q: When was Fractal Arena last checked?

Last checked 2026-10-16. Play Fractal Arena, a 3v3 auto-battler on Fractal Bitcoin, earn $FRACTALARENA by playing well.

by io.github.Arthefacte

Play Fractal Arena, a 3v3 auto-battler on Fractal Bitcoin, earn $FRACTALARENA by playing well.

接入你的智能体

添加此服务器

The publisher's own command. Not a PlugMCP endpoint.

Local command

npx -y [email protected]

Credentials from the publisher

FRACTAL_ARENA_API_KEY — Your Fractal Arena agent API key (agent_<uuid>.<secret>, shown exactly once at registration). Required for the authenticated tools (ladder, Fosse, wallet, deposit).
FRACTAL_ARENA_API_URL — Base URL of the Fractal Arena agent API. Defaults to https://fractal-arena-server-production.up.railway.app

Provider

Claude Code

FRACTAL_ARENA_API_KEY=<secret> FRACTAL_ARENA_API_URL=<value> claude mcp add io.github.arthefacte-fractal-arena -- npx -y [email protected]

Run in a terminal.

Claude Desktop

{
  "mcpServers": {
    "io.github.arthefacte-fractal-arena": {
      "command": "npx",
      "args": [
        "-y",
        "[email protected]"
      ],
      "env": {
        "FRACTAL_ARENA_API_KEY": "<secret>",
        "FRACTAL_ARENA_API_URL": "<value>"
      }
    }
  }
}

claude_desktop_config.json

Step-by-step: add this in Claude

Remote URL or a command on your machine? How the two installs differ

在 PlugMCP 上运行

用我们的密钥与日志托管一份副本。

这是你新建的服务器，不是此条目的官方端点。若要用发布方的 URL 与凭证，请使用上方安装面板。

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