Kalshi API Documentation

Complete API reference for Kalshi's prediction markets platform. Use this skill when:

• Building trading bots or integrations with Kalshi
• Working with market data, orders, or portfolio APIs
• Implementing WebSocket connections for real-time data
• Understanding authentication and rate limits

Documentation Structure

• api-reference/ - Complete REST API endpoints organized by category:

- api-keys/ - API key management - communications/ - RFQs and quotes - events/ - Event data and series - exchange/ - Exchange info, schedule, announcements - market/ - Market data, orderbooks, candlesticks - orders/ - Order placement and management - portfolio/ - Positions, fills, balance, settlements - multivariate/ - Multi-leg market operations

• getting_started/ - Quickstart guides and concepts
• websockets/ - WebSocket API for real-time streaming
• asyncapi.yaml - WebSocket API schema (AsyncAPI format)
• changelog.md - API changes and updates

Key Files

• gettingstarted/apikeys.md - API key setup and authentication
• gettingstarted/quickstartmarketdata.md - Fetching market data
• gettingstarted/quickstartcreateorder.md - Placing orders
• gettingstarted/quickstart_websockets.md - Real-time streaming
• gettingstarted/ratelimits.md - Rate limiting details
• api-reference/portfolio/ - Trading and position management
• api-reference/market/ - Market data endpoints

Usage Notes

• API base URL: https://api.kalshi.com/trade-api/v2
• WebSocket URL: wss://api.kalshi.com/trade-api/ws/v2
• Demo environment available at https://demo-api.kalshi.co
• All trading endpoints require authentication via API key
• Rate limits apply - see gettingstarted/ratelimits.md