IQAIcom/mcp-polymarket

📊 Polymarket MCP Server

📖 Overview

The Polymarket MCP Server enables AI agents to interact with Polymarket, a leading prediction market platform on Polygon. This server provides comprehensive access to market data, real-time pricing, order books, and trading capabilities through the Polymarket API.

By implementing the Model Context Protocol (MCP), this server allows Large Language Models (LLMs) to discover prediction markets, analyze odds (probabilities), execute trades, and track portfolio positions directly through their context window, bridging the gap between AI and decentralized prediction markets.

✨ Features

• Market Discovery: Search and filter prediction markets by keywords, tags, and status.
• Real-time Pricing: Access live price data, implied probabilities, and depth-of-market (order books) for any outcome token.
• Trading Capabilities: Place limit orders, market orders, and manage open orders (requires private key).
• Portfolio Tracking: Monitor user positions, trade history, and balances for specific wallet addresses.
• Order Management: View, cancel, and manage open orders across all markets.

📦 Installation

🚀 Using npx (Recommended)

To use this server without installing it globally:

npx @iqai/mcp-polymarket

🔧 Build from Source

git clone https://github.com/IQAIcom/mcp-polymarket.git
cd mcp-polymarket
pnpm install
pnpm run build

⚡ Running with an MCP Client

Add the following configuration to your MCP client settings (e.g., claude_desktop_config.json).

📋 Minimal Configuration (Read-Only)

{
  "mcpServers": {
    "polymarket": {
      "command": "npx",
      "args": ["-y", "@iqai/mcp-polymarket"]
    }
  }
}

⚙️ Advanced Configuration (With Trading)

{
  "mcpServers": {
    "polymarket": {
      "command": "npx",
      "args": ["-y", "@iqai/mcp-polymarket"],
      "env": {
        "POLYMARKET_PRIVATE_KEY": "your_private_key_here",
        "POLYMARKET_RPC_URL": "https://polygon-mainnet.g.alchemy.com/v2/<YOUR_KEY>"
      }
    }
  }
}

🔐 Configuration (Environment Variables)

💡 Usage Examples

🔍 Market Discovery

• "What are the most active prediction markets on Polymarket right now?"
• "Search for markets related to 'Bitcoin' or 'BTC'."
• "Find markets in the 'Crypto' category."
• "What events are trending on Polymarket today?"

📊 Analytics & Pricing

• "Show me the order book for the 2024 election market."
• "What is the current probability implied by the price of the 'Yes' token?"
• "Get detailed information about the 'will-trump-win-2024' market."

💼 Portfolio & Trading (Requires Private Key)

• "What's my current USDC balance and allowance?"
• "Show me all my open orders across all markets."
• "Place a buy order for 100 shares at 0.65 price."
• "Cancel all my open orders on this market."

🛠️ MCP Tools

approve_allowances

Grant the USDC and Conditional Tokens approvals required to trade on Polymarket. Automatically approves only the contracts that don't already have approvals set. Includes both regular and NegRisk markets. These approvals are standard ERC20/ERC1155 approvals, revocable at any time in your wallet.

cancel_all_orders

Cancel all open orders for the authenticated account.

No parameters

cancel_order

Cancel a specific order by its ID.

get_all_tags

Get a list of all available tags for categorizing markets.

No parameters

get_balance_allowance

Get balance and allowance information for the authenticated account. Can check COLLATERAL or CONDITIONAL tokens.

get_event_by_slug

Get detailed information about a specific event by its slug identifier. Events group multiple related markets.

get_market_by_slug

Get detailed information about a specific market by its slug identifier. The slug can be extracted from the Polymarket URL.

get_markets_by_tag

Get markets filtered by a specific tag ID. Useful for finding markets in specific categories.

get_open_orders

Get all open orders for the authenticated account. Can optionally filter by market.

get_order

Get details of a specific order by its ID.

get_order_book

Get the current order book for a specific market token. Shows all active buy and sell orders.

get_positions

Get all positions for a wallet address with current values. Returns position details including size, current price, current value, and P&L. Uses the Polymarket Data API for accurate position valuation.

get_trade_history

Get trade history for the authenticated account. Can optionally filter by market or maker address.

list_active_markets

List all currently active markets with pagination. Returns markets that are not yet closed.

place_market_order

Place a market order that executes immediately at current market price. IMPORTANT: For BUY orders, amount is the dollar amount ($USD) you want to spend. For SELL orders, amount is the number of shares to sell. Example: amount=5, side=BUY means 'spend $5 to buy shares at market price'. Minimum $1 for BUY orders.

place_order

Place a limit order on Polymarket at a specific price. Specify the number of shares (size) and price (0-1). For both BUY and SELL, you specify the number of shares you want to trade. Example: size=10, price=0.6 means buy/sell 10 shares at $0.60 per share (total: $6).

redeem_positions

Redeem (claim) winnings from a resolved Polymarket prediction market. Use this to collect USDC from positions in markets that have been settled. For regular markets, you need the conditionId. For negative risk markets, you also need the tokenId and should set negRisk=true. The market must be resolved before redemption is possible.

search_markets

Search for markets, events, and profiles using text search.

update_balance_allowance

Update balance and allowance for the authenticated account. Required before trading.

👨‍💻 Development

🏗️ Build Project

pnpm run build

👁️ Development Mode (Watch)

pnpm run watch

✅ Linting & Formatting

pnpm run lint
pnpm run format

📁 Project Structure

• src/tools/: Individual tool definitions
• src/services/: API client and business logic
• src/index.ts: Server entry point

📚 Resources

• Polymarket API Documentation
• Model Context Protocol (MCP)
• Polymarket Platform

⚠️ Disclaimer

This project is an unofficial tool and is not directly affiliated with Polymarket. It interacts with financial and prediction market data. Users should exercise caution and verify all data independently. Trading in prediction markets involves risk.

📄 License