kalshi-mcp 0.1.0

MCP server for Kalshi prediction markets - search, analyze, and trade prediction markets through Claude Desktop

Kalshi MCP Server

Model Context Protocol server for Kalshi prediction markets. Search, analyze, and trade prediction markets directly through Claude Desktop.

Built with production-grade authentication and rate limiting from a live trading system with 4+ months of uptime.

Features

Tools (6)

• search_markets - Search by keyword, get prices/volume
• get_market_details - Full market info + orderbook depth
• get_portfolio - Account balance + open positions
• get_trending_markets - Top markets by 24h volume
• place_order - Execute limit orders
• get_series_markets - All markets in a series (e.g., Fed events)

Resources (2)

• kalshi://balance - Current account balance
• kalshi://positions - Open positions list

Installation

Prerequisites

1. Kalshi API credentials: Get from kalshi.com/profile/api-keys

   • Download your API key ID
   • Download the RSA private key (.pem file)

2. Python 3.10+

Setup

# Clone repository
git clone https://github.com/yakub268/kalshi-mcp.git
cd kalshi-mcp

# Install dependencies
uv pip install -e .

# Configure credentials
cp .env.example .env
# Edit .env with your API key and private key path

Claude Desktop Configuration

Add to your Claude Desktop config file:

macOS: ~/Library/Application Support/Claude/claude_desktop_config.json Windows: %APPDATA%\Claude\claude_desktop_config.json

{
  "mcpServers": {
    "kalshi": {
      "command": "uv",
      "args": [
        "--directory",
        "/ABSOLUTE/PATH/TO/kalshi-mcp",
        "run",
        "kalshi_mcp.py"
      ],
      "env": {
        "KALSHI_API_KEY": "your-api-key-here",
        "KALSHI_PRIVATE_KEY_PATH": "/path/to/kalshi_private_key.pem"
      }
    }
  }
}

Important: Replace /ABSOLUTE/PATH/TO/kalshi-mcp with the actual path where you cloned the repository.

Test the Connection

Restart Claude Desktop, then try:

What's my Kalshi balance?

or

Search for bitcoin prediction markets

Usage Examples

Search for Markets

Search for markets about the Federal Reserve

Get Market Analysis

Show me details for ticker KXFED-26MAR19-B5.25

Check Portfolio

What's my current Kalshi portfolio?

Place an Order

Buy 10 contracts of KXHIGHNYC-26FEB20-B34.5 YES at 25 cents

Authentication

This server uses RSA-PSS signature authentication:

1. Each request is signed with your private key
2. Kalshi verifies the signature with your public key
3. Thread-safe rate limiting (150ms between requests)
4. Automatic retry on 429 rate limit errors

Security: Your private key never leaves your machine. The server only signs requests locally.

Rate Limiting

• Built-in 150ms spacing between requests (~6.6 req/s)
• Automatic exponential backoff on 429 errors (0.5s → 1s → 2s)
• Safe for concurrent use across multiple Claude conversations

Architecture

Built on production code from a live Kalshi trading bot:

• Authentication: Reused from kalshi_client.py (4+ months uptime)
• Rate limiting: Shared across all client instances
• Error handling: Battle-tested retry logic
• Market discovery: Liquidity scoring from scanner.py

Contributing

Issues and PRs welcome! This is an open-source project built to fill a gap in the MCP ecosystem.

License

MIT License - see LICENSE file

Acknowledgments

• Built with FastMCP
• Kalshi API documentation: docs.kalshi.com
• Production code from my trading bot arsenal

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Questions? Open an issue or reach out on GitHub.