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io.github.Arthefacte/fractal-arena

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

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

NPM package fractal-arena-mcp
Claude Code 
claude mcp add fractal-arena -e 'FRACTAL_ARENA_API_KEY=<your fractal_arena_api_key>' -e 'FRACTAL_ARENA_API_URL=<FRACTAL_ARENA_API_URL>' -- npx -y fractal-arena-mcp@1.20.0
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "fractal-arena": {
            "command": "npx",
            "args": [
                "-y",
                "fractal-arena-mcp@1.20.0"
            ],
            "env": {
                "FRACTAL_ARENA_API_KEY": "<your fractal_arena_api_key>",
                "FRACTAL_ARENA_API_URL": "<FRACTAL_ARENA_API_URL>"
            }
        }
    }
}

Environment variables

  • FRACTAL_ARENA_API_KEY required secret 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

Frequently asked questions

What is io.github.Arthefacte/fractal-arena?

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

How do I install io.github.Arthefacte/fractal-arena?

It runs on your machine. In Claude Code: claude mcp add fractal-arena -e 'FRACTAL_ARENA_API_KEY=<your fractal_arena_api_key>' -e 'FRACTAL_ARENA_API_URL=<FRACTAL_ARENA_API_URL>' -- npx -y fractal-arena-mcp@1.20.0. For other clients, paste the JSON configuration from this page into their MCP settings.

Does io.github.Arthefacte/fractal-arena need an API key?

Yes. It expects FRACTAL_ARENA_API_KEY, which you set in its configuration.

Who maintains io.github.Arthefacte/fractal-arena?

It is published by Arthefacte. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.