Kalshi APIs & SDKs

Kalshi APIs and SDKs give developers programmatic access to the exchange. The Kalshi Trading API exposes markets, order books, portfolios, and real-time updates over REST and WebSocket, with a FIX gateway for latency-sensitive institutional flow. SDKs wrap those endpoints in typed clients so you can authenticate, place orders, and stream data without hand-rolling HTTP.

These tools are the foundation for everything else in the catalog — bots, terminals, trackers, and data pipelines all sit on top of them. Because Kalshi is CFTC-regulated, the API enforces the same rules as the UI: USD balances, position limits, and compliant order handling, so anything you build inherits that guardrail.

This category collects official and community client libraries, API wrappers, code samples, and developer utilities for building on Kalshi in Python, TypeScript, and beyond.