MCP Server

Arena Predictions MCP Server

com.arena-predictions/arena

Registry

What is the Arena Predictions MCP server?

Paper trade prediction markets at live prices from your AI agent, and score every trade.

How to install Arena Predictions

Copy-paste configuration for popular MCP clients.

transport: stdio

Config generated by PluginBench — verify against the source before use.

Environment / auth

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.

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

{
  "mcpServers": {
    "arena": {
      "command": "npx",
      "args": [
        "-y",
        "arena-mcp-server"
      ],
      "env": {
        "ARENA_MCP_ALLOW_TRADE": "<YOUR_ARENA_MCP_ALLOW_TRADE>",
        "ARENA_ALLOW_RESET": "<YOUR_ARENA_ALLOW_RESET>",
        "ARENA_CREDENTIALS_FILE": "<YOUR_ARENA_CREDENTIALS_FILE>"
      }
    }
  }
}

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