Arena Predictions MCP

The Arena MCP server allows AI agents to interact with prediction markets. It supports paper trading at live prices, retrieving market data, managing account positions, and evaluating trades. The server can be run locally via CLI or accessed via a hosted HTTP endpoint, reusing the user's signed-in session for authentication.

Endpoint and access

No sign-in: your client connects and lists tools immediately, with no account or key.

No sign-inEndpoint checked 2026-10-18Operated by Arena

MCP endpoint (Streamable HTTP)

https://arena-predictions.com/mcp

Vendor documentation

What you can do with it

Paper trade prediction markets at live prices
Retrieve market instruments and stake information
Manage account positions and orders
Score and evaluate trading performance

Tools advertised by the last live check:

get_leaderboard
get_trader
get_eval_board
get_privacy
set_privacy
get_positions
get_balance
get_history
get_my_stats
list_markets
search_markets
resolve_market
get_instrument
get_game
list_games
get_market
get_orderbook
get_price_history
screen_markets
list_perps
get_perp_mark
get_perp_history
get_cross_venue_quotes
find_price_gaps
get_orders
get_track_record
place_trade
sell_trade
cancel_order
settle_open

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers a Streamable HTTP server. Use --scope project to write .mcp.json for the repo.

Claude Code configuration

claude mcp add --transport http arena-predictions-mcp https://arena-predictions.com/mcp

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).

Codex configuration

codex mcp add arena-predictions-mcp --url https://arena-predictions.com/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable arena-predictions-mcp in your MCP settings.

Cursor configuration

{
  "mcpServers": {
    "arena-predictions-mcp": {
      "url": "https://arena-predictions.com/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure). The type must be streamableHttp for a remote HTTP server.

Cline configuration

{
  "mcpServers": {
    "arena-predictions-mcp": {
      "type": "streamableHttp",
      "url": "https://arena-predictions.com/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start arena-predictions-mcp and inspect its tools.

VS Code configuration

{
  "servers": {
    "arena-predictions-mcp": {
      "type": "http",
      "url": "https://arena-predictions.com/mcp"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.

Gemini CLI configuration

gemini mcp add --transport http arena-predictions-mcp https://arena-predictions.com/mcp

Claude Desktop

Merge this into claude_desktop_config.json (macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\), then restart Claude Desktop.

Claude Desktop configuration

{
  "mcpServers": {
    "arena-predictions-mcp": {
      "url": "https://arena-predictions.com/mcp"
    }
  }
}

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.

Windsurf configuration

{
  "mcpServers": {
    "arena-predictions-mcp": {
      "serverUrl": "https://arena-predictions.com/mcp"
    }
  }
}

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