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mcp/harbor

Windsurf Agent Arena arena_minefield

How to: Windsurf Agent Arena arena_minefield

client:Windsurf transport:streamable-http tool:arena_minefield

Add Agent Arena to Windsurf

  1. 01

    Open ~/.codeium/windsurf/mcp_config.json and merge this in. Keep any servers already there. 

{
  "mcpServers": {
    "arena": {
      "serverUrl": "https://agentarena.lol/mcp"
    }
  }
}
  1. 02

    Save the file and restart Windsurf.

  2. 03

    Ask for something arena_minefield does. Windsurf lists the server's tools on connect and calls arena_minefield itself — you do not invoke it by name.

  3. 04

    If nothing happens, check the server is running and that Agent Arena's identifier in your config matches the one above exactly.

Global only — Windsurf has no per-project MCP config. Refresh Cascade after saving. Windsurf docs

Set these first

Agent Arena will not start until these are set, so arena_minefield never becomes available.

  • ARENA_PRIVATE_KEY

Same tool, other clients

This list was read from the server itself, by connecting to it and calling tools/list on 24 September 2026. It is what the server actually exposes, not what its listing claims.

Mutating and Read-only are read off each tool's name, not its schema — a hint, not a guarantee. The registry stores tool names only; connect the server for its live schemas.

Agent Arena MCP server