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Kalshi

Kalshi MCP — US-regulated prediction-market data (no auth on public reads).

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MCP Server Kalshi

This is an MCP server for the Kalshi REST API

Configuration

Claude Desktop

Setting up with UVX

"mcpServers": {
  "kalshi": {
    "command": "uvx",
    "args": ["mcp-server-kalshi"],
    "env": {
        "KALSHI_PRIVATE_KEY_PATH": "PATH TO YOUR RSA KEY FILE",
        "KALSHI_API_KEY": "<YOUR KALSHI API KEY>",
        "BASE_URL": "https://api.elections.kalshi.com"
    }
  }
}

Setting up with Docker

Build the container from root directory docker build -t mcp-server-kalshi .
Configure client to run the container (ensure the bind command gives the container access to your rsa key files)

"mcpServers": {
  "kalshi": {
    "command": "docker",
    "args": ["run", "--rm", "-i", "--mount", "type=bind,src=/Users/username,dst=/Users/username", "-e", "KALSHI_PRIVATE_KEY_PATH", "-e", "KALSHI_API_KEY","-e", "BASE_URL", "mcp-server-kalshi"],
    "env": {
        "KALSHI_PRIVATE_KEY_PATH": "PATH TO YOUR RSA KEY FILE",
        "KALSHI_API_KEY": "<YOUR KALSHI API KEY>",
        "BASE_URL": "https://api.elections.kalshi.com"
    }
  }
}

Local Development

Create a .env file in the root directory with the following variables
- BASE_URL The kalshi API URL
- KALSHI_API_KEY The API key for the corresponding environment
- KALSHI_PRIVATE_KEY_PATH A filepath to a file containing your Kalshi RSA private key
Install deps via uv pip install -e . Dev deps can be installed with uv pip install -e .[dev]
Run with uv run start

Getting Kalshi API Creds

To get Kalshi API creds, follow the instrictions here

Getting a Test Account

You may want to run the server against a kalshi demo account. To get an account, follow the instructions here

Then, set BASE_URL=https://demo-api.kalshi.co for this MCP server and update your KALSHI_API_KEY and KALSHI_PRIVATE_KEY_PATH to point towards credentials generated in the testing environment

UVX

To run in MCP inspector

npx @modelcontextprotocol/inspector uv --directory /path/to/your/mcp-server-kalshi run start

To run in claud desktop, update your MCP config to:

{
    "mcpServers": {
        "kalshi": {
            "command": "uv",
            "args": [ 
            "--directory",
            "/<path to repo root directory>",
            "run",
            "start"
            ],
            "env": {
                "KALSHI_PRIVATE_KEY_PATH": "PATH TO YOUR RSA KEY FILE",
                "KALSHI_API_KEY": "<YOUR KALSHI API KEY>",
                "BASE_URL": "https://api.elections.kalshi.com"
            }
        }
    }
}