WP Twitch Status is a free plugin for WordPress that uses the API from Twitch to retrieve the data of a specified Twitch stream to show its status on your website.
You can configure it by going to Settings > General > WP Twitch Status and filling in all the details. The fields are all required. Click on the links “Learn more” in the description of the fields to learn how to get the necessary data.
This plugin is available for download to be used on your WordPress self-hosted installation.