Kalshi API

Kalshi API offers developers access to the Kalshi Exchange's real-time market data and trade execution features. It is designed for financial institutions, DeFi developers, and analytics teams who require programmatic access to event-driven markets for trading and data analysis. The API supports REST and WebSocket protocols, enabling both historical data retrieval and live streaming of market updates.

The API includes comprehensive documentation, an OpenAPI specification for easy integration, and a demo environment for safe testing. Developers can generate API keys to authenticate requests and use the trading console for manual interaction. Kalshi also provides AsyncAPI specifications for WebSocket integration, facilitating real-time data streaming.

What sets Kalshi API apart is its focus on event-based trading markets, allowing users to build applications that trade on real-world event outcomes. This differentiates it from traditional financial APIs by combining prediction market mechanics with exchange-grade infrastructure. The platform's detailed changelog and glossary help developers stay informed and understand domain-specific terminology.

To get started, developers should review the quick start guides, generate API credentials, and test their integration in the demo environment. The API supports both synchronous REST calls and asynchronous WebSocket streams, making it flexible for various trading and data use cases.