Datadash Polymarket MCP server

Polymarket analytics for AI assistants. This package connects any MCP client that launches a local command (Claude Desktop, Windsurf, Cline, Zed and others) to the hosted Datadash MCP server, so your assistant can answer questions about Polymarket traders, Smart Money, Signals, positions and market holders with live data.

Website: datadash.xyz/mcp · Docs: docs.datadash.xyz/mcp-server

What your assistant can do with it

• Rank Polymarket wallets by realized PnL, volume, win rate or ROI, overall or per category
• See which side Smart Money holds on an event, and which markets carry the biggest Smart Money edge
• Find unusually sized bets through Signals scores
• Pull a wallet's open and closed positions, PnL and trade history
• List a market's holders, current and exited
• Create cohorts of wallets and ask what they are holding

The tools come from the hosted server, so they stay current without updating this package.

Requirements

• Node.js 20 or later
• A Datadash API key: create one at datadash.xyz/settings/api-keys. The limits of your Datadash plan apply.

Setup

Add the server to your client's MCP configuration. For Claude Desktop, that is claude_desktop_config.json:

{
    "mcpServers": {
        "datadash": {
            "command": "npx",
            "args": ["-y", "@datadashxyz/mcp"],
            "env": {
                "DATADASH_API_KEY": "<your-api-key-here>"
            }
        }
    }
}

Other clients take the same command, args and env. Restart the client and datadash appears in its list of MCP servers.

Clients that speak Streamable HTTP, such as Claude Code, Cursor, Codex and VS Code, do not need this package: point them straight at https://api.datadash.xyz/mcp with your key in the X-Api-Key header. The setup guide has a configuration for each.

Environment

| Variable | Required | Description | | ------------------ | -------- | ---------------------------------------------------------- | | DATADASH_API_KEY | Yes | Your Datadash API key | | DATADASH_MCP_URL | No | Server address. Defaults to https://api.datadash.xyz/mcp |

Try these first

• Who are the top 10 wallets by realized PnL in crypto markets?
• What is smart money positioned on in the biggest active politics markets?
• Which markets resolving in the next 30 days have the biggest smart money edge among the top 1,000 traders?
• Build a cohort of wallets with over $100k in volume and a win rate above 60%, then tell me what they are holding.

Your key

The key can do anything your Datadash account can, including creating and deleting your cohorts. Create a separate key for each MCP client so you can revoke it on its own. The server cannot place trades.