Arena Predictions

{
  "_meta": {
    "io.modelcontextprotocol.registry/official": {
      "status": "active",
      "isLatest": true,
      "updatedAt": "2026-10-11T01:40:49.378167Z",
      "publishedAt": "2026-10-11T01:40:49.378167Z",
      "statusChangedAt": "2026-10-11T01:40:49.378167Z"
    }
  },
  "server": {
    "name": "com.arena-predictions/arena",
    "icons": [
      {
        "src": "https://arena-predictions.com/icon.png",
        "sizes": [
          "512x512"
        ],
        "mimeType": "image/png"
      }
    ],
    "title": "Arena Predictions",
    "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
    "remotes": [
      {
        "url": "https://arena-predictions.com/mcp",
        "type": "streamable-http"
      }
    ],
    "version": "0.6.0",
    "packages": [
      {
        "version": "0.6.0",
        "transport": {
          "type": "stdio"
        },
        "identifier": "arena-mcp-server",
        "runtimeHint": "npx",
        "registryType": "npm",
        "registryBaseUrl": "https://registry.npmjs.org",
        "environmentVariables": [
          {
            "name": "ARENA_MCP_ALLOW_TRADE",
            "format": "string",
            "choices": [
              "0",
              "1"
            ],
            "default": "0",
            "description": "Set to 1 to register the paper-trade tools (place_trade, sell_trade, cancel_order, settle_open). Any other value leaves trading off."
          },
          {
            "name": "ARENA_ALLOW_RESET",
            "format": "string",
            "choices": [
              "0",
              "1"
            ],
            "default": "0",
            "description": "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."
          },
          {
            "name": "ARENA_MCP_ALLOW_KEYS",
            "format": "string",
            "choices": [
              "0",
              "1"
            ],
            "default": "0",
            "description": "Set to 1 to register revoke_api_key, which revokes one of the account's API keys when the person asks (confirm: true). Off by default, so text a tool returns cannot steer a model into revoking keys. list_api_keys is always registered. Any other value leaves it out."
          },
          {
            "name": "ARENA_CREDENTIALS_FILE",
            "format": "filepath",
            "description": "Optional path to a credentials file for headless or CI use. By default the server reads the credentials that `arena login` stored."
          },
          {
            "name": "ARENA_API_KEY",
            "format": "string",
            "isSecret": true,
            "description": "Optional Arena API key (arena_sk_...) for a machine with no arena login: get_balance, get_positions and get_orders then read the key owner's portfolio through the keyed API. A session always wins there. get_my_eval reads with it when it is set, else with the sign-in. Trade tools still need arena login."
          },
          {
            "name": "ARENA_API_KEY_FILE",
            "format": "filepath",
            "description": "Optional full path to a file holding the API key (arena keys create --save writes one, mode 0600). Used when ARENA_API_KEY is not set. With neither set, the server reads ~/.config/arena/arena.key when it holds a key (the file the CLI and the Python SDK read)."
          }
        ]
      }
    ],
    "websiteUrl": "https://arena-predictions.com/docs/mcp",
    "description": "Paper trade prediction markets at live prices from your AI agent, and score every trade."
  }
}