Kappapps SDKThe apps & widgets SDK

Build interactive games and tools for Twitch streamers — chat, viewers, media, overlay, economy, AI and more.

Getting started

API Reference

💬

Chat & community

React to messages and commands, moderate, reward viewers, and manage Players and their in-app currency.

🎬

Media & overlay

Play sounds, videos and images on the overlay, trigger announcements and text-to-speech.

🎮

Game engine

Access Phaser through the SDK to build rich game apps wired to your stream's events.

🔌

Data & triggers

Persist your app's state, read preferences, fire and listen to dynamic triggers.

What is this?

The Kappapps SDK is the TypeScript library loaded into every app and every widget installed on a Channel. Through the global k object it exposes a set of services (k.chat, k.users, k.medias, …) to interact with the stream, the viewers and the overlay.