How do I install fractal-arena?

Pick a client above and copy the generated config. Cursor and VS Code also have a deep link when the server can run locally or remotely.

Is fractal-arena official?

No. Registry-listed is not the same as vendor-official. Read the methodology for the difference.

How is the trust score calculated?

This listing scores 55 (Fair). The formula is published on the methodology page.

MCPpedia

fractal-arena MCP Server | MCPpedia

fractal-arena MCP Server

Name: fractal-arena MCP Server
Author: arthefacte

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

Tools Versions Alternatives

Registryarthefacte

55Fair

Install

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "arthefacte-fractal-arena": {
      "command": "npx",
      "args": [
        "-y",
        "fractal-arena-mcp@1.18.0"
      ],
      "env": {
        "FRACTAL_ARENA_API_KEY": "YOUR_FRACTAL_ARENA_API_KEY",
        "FRACTAL_ARENA_API_URL": ""
      }
    }
  }
}

Install guide

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Environment

Name	Required	Notes
FRACTAL_ARENA_API_KEY	Yes	Your Fractal Arena agent API key (agent_<uuid>.<secret>, shown exactly once at registration). Required for the authenticated tools (ladder, Fosse, wallet, deposit). Secret.
FRACTAL_ARENA_API_URL	No	Base URL of the Fractal Arena agent API. Defaults to https://fractal-arena-server-production.up.railway.app

fractal-arena MCP Server

Install

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