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io.github.yakub268/kalshi

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Search, analyze, and trade Kalshi prediction markets through Claude Desktop

Source code Documentation

What can you do with io.github.yakub268/kalshi?

  • 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)

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

PYPI package kalshi-mcp
Claude Code 
claude mcp add kalshi -e 'KALSHI_API_KEY=<your kalshi_api_key>' -e 'KALSHI_PRIVATE_KEY_PATH=<KALSHI_PRIVATE_KEY_PATH>' -- uvx kalshi-mcp==0.1.1
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "kalshi": {
            "command": "uvx",
            "args": [
                "kalshi-mcp==0.1.1"
            ],
            "env": {
                "KALSHI_API_KEY": "<your kalshi_api_key>",
                "KALSHI_PRIVATE_KEY_PATH": "<KALSHI_PRIVATE_KEY_PATH>"
            }
        }
    }
}

Environment variables

  • KALSHI_API_KEY required secret Your Kalshi API key ID
  • KALSHI_PRIVATE_KEY_PATH required Path to your Kalshi RSA private key file (.pem)

Documentation

From the project's README on GitHub, refreshed weekly. Links open on GitHub.

Contents
  1. Kalshi MCP Server
  2. Features
  3. Installation
  4. Usage Examples
  5. Authentication
  6. Rate Limiting
  7. Architecture
  8. Contributing
  9. License
  10. Acknowledgments

Kalshi MCP Server

mcp-name: io.github.yakub268/kalshi

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+
Quick Install (PyPI)
pip install kalshi-mcp
From Source
# Clone repository
git clone https://github.com/yakub268/kalshi-mcp.git
cd kalshi-mcp

# Install dependencies
pip install -e .
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": "python",
      "args": ["-m", "kalshi_mcp"],
      "env": {
        "KALSHI_API_KEY": "your-api-key-here",
        "KALSHI_PRIVATE_KEY_PATH": "C:\\Users\\YourName\\.trading_keys\\kalshi_private_key.pem"
      }
    }
  }
}

Note:

  • Replace your-api-key-here with your actual Kalshi API key
  • Update the private key path to where you saved your .pem file
  • On Windows, use double backslashes (\\) in paths
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

Questions? Open an issue or reach out on GitHub.

Frequently asked questions

What is io.github.yakub268/kalshi?

Search, analyze, and trade Kalshi prediction markets through Claude Desktop

How do I install io.github.yakub268/kalshi?

It runs on your machine. In Claude Code: claude mcp add kalshi -e 'KALSHI_API_KEY=<your kalshi_api_key>' -e 'KALSHI_PRIVATE_KEY_PATH=<KALSHI_PRIVATE_KEY_PATH>' -- uvx kalshi-mcp==0.1.1. For other clients, paste the JSON configuration from this page into their MCP settings.

Does io.github.yakub268/kalshi need an API key?

Yes. It expects KALSHI_API_KEY, KALSHI_PRIVATE_KEY_PATH, which you set in its configuration.

Is io.github.yakub268/kalshi open source?

Yes. Its code is on GitHub under the MIT license.

Who maintains io.github.yakub268/kalshi?

It is published by yakub268. AI.tn lists it but does not maintain or endorse it.

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