Kalshi Order Book Watcher: Websockets For Real-Time Data in Python

In this video, we discuss how to subscribe to Kalshi order book updates using Python and websockets. 0:00 Intro / Overview 1:00 Orderbook watcher demo, what we’re building 1:26 TUI version with keyboard shortcuts 2:00 Super Bowl prop bet order book observations 5:09 Getting and setting up Kalshi API key 6:18 Installing python dependencies 7:12 A simple unauthenticated websocket 8:07 How to authenticate the websocket connection 10:40 Subscribing to websocket channels 12:42 The structure of the subscribe message 13:38 What happens when you subscribe 14:32 Order book snapshots vs order book deltas 17:07 OrderBook class for storing local state of order book 20:03 Streaming the raw OrderBook dictionaries 20:26 Processing and displaying the OrderBook data 23:08 What’s next, what now Writeup / code (free with email): https://hackingthemarkets.com/building-a-live-order-book-watcher-for-kalshi/