A full development environment to build Twitch Extensions. Currently only supports panel extensions but video overlay coming soon.
Switch branches/tags
Nothing to show
Clone or download
Fetching latest commit…
Cannot retrieve the latest commit at this time.
Failed to load latest commit information.


Muxy Extension Rig

Muxy Logo

The Muxy Extension Rig combined with the Muxy Extension SDK can greatly speed up the development of Twitch Extensions.

See also:

Muxy Extension JavaScript Library

Overlay App Rig


The Rig simulates the Twitch environment that extension run in. Combined with the Muxy SDK it allows extensions to safely be sandboxed away from production data and any hiccups that can happen on Twitch's site. When running in the rig the Muxy SDK also provides a pubsub system that works exactly like the production one on Twitch.

Managing Twitch Extension Secrets

Before you can use the Muxy Extension SDK you will have to create a new extension on https://dev.twitch.tv.

Once you have done that take the Client ID from Overview and Secret from the Settings section and submit them to https://u.muxy.io/dashboard/developers. This will allow the automatic sandbox credentials to work for your extension.

Software Requirements

The skeleton runs as a NodeJS web server, and as such a globally accessible version of NodeJS must be available. The LTS version (currently 6.11) is used to test against. NodeJS may be downloaded here.

This documentation is bundled with the App Skeleton. The code can always be found on its GitHub page with specific tagged releases available.

The NodeJS libraries required to run the skeleton can be installed by running npm install on the command line.

Developing with the Rig

You can develop an extension directly in the rig by adding a folder under the src folder and creating a manifest.

If you are planning developing with an asset pipeline or bundler (gulp, webpack, etc.) you'll want to create a new folder in the Rig source folder and set that as your output folder. The webserver shipped with the Rig will then serve those assets.

There are two example apps under the src folder that show off the absolute minimum for an Extension with the Muxy Extension SDK. For documentation on the Muxy Extension SDK visit https://github.com/muxy/extensions-js


Putting a manifest.json file in the root of your app lets us know what files we should load into the rig. Along with any other configuration settings that are available.

  "viewer_path": "viewer.html",
  "config_path": "config.html",
  "live_config_path": "live.html",
  "panel_height": 100


To run the rig, simply run PORT=4000 npm run dev. This will start the server running on port 4000 on your local machine. You may change the port to suite your environment.

Once running, visit http://localhost:4000 to see the extension rig.