Arena Predictions MCP Server

com.arena-predictions/arenav0.5.0

MCP server for Arena Predictions, paper trading for prediction markets at live prices. Look up games and instruments, read quotes, place paper trades and grade your own trading from Claude, Cursor or any MCP client.

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Active11d ago

Install Arena Predictions MCP server

claude mcp add arena -- npx -y arena-mcp-server

{
  "mcpServers": {
    "arena": {
      "command": "npx",
      "args": [
        "-y",
        "arena-mcp-server"
      ]
    }
  }
}

Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (project).

{
  "mcpServers": {
    "arena": {
      "command": "npx",
      "args": [
        "-y",
        "arena-mcp-server"
      ]
    }
  }
}

Settings → Developer → Edit Config (claude_desktop_config.json), then restart.

{
  "servers": {
    "arena": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "arena-mcp-server"
      ]
    }
  }
}

Add to .vscode/mcp.json in your workspace.

{
  "mcpServers": {
    "arena": {
      "command": "npx",
      "args": [
        "-y",
        "arena-mcp-server"
      ]
    }
  }
}

Add to ~/.codeium/windsurf/mcp_config.json.

Configuration

Variable	Required	Secret	Description
ARENA_MCP_ALLOW_TRADE	—	—	Set to 1 to register the paper-trade tools (place_trade, sell_trade, get_orders, cancel_order, settle_open). Any other value leaves trading off.
ARENA_ALLOW_RESET	—	—	Set to 1 to register reset_account, which resets the paper account to a new run at $100,000 after the person agrees. The server also refuses until the owner turns resets on in Settings on the web. Any other value leaves it out.
ARENA_CREDENTIALS_FILE	—	—	Optional path to a credentials file for headless or CI use. By default the server reads the credentials that `arena login` stored.