EventSub is our interface that defines the real-time Twitch events accessible to third-party developers such as hype trains, when a creator goes live, or when a viewer subscribes to a channel. Providing this information empowers creator tools, games, and other applications to build interactive experiences and provide those magic moments in live broadcasting that are compelling and meaningful.
When we launched EventSub, we started with Webhooks as our first supported transport protocol for receiving event information and we promised more protocols in the future to unlock further use cases. In January, we announced the closed beta for WebSockets in EventSub. We’ve been gathering feedback and improving the product since then and today it is available for everyone in open beta.
Developers have made it clear that there are certain scenarios where Webhooks aren’t the best solution. Many applications run on computers or devices that the developer does not have control of, for example, a browser application to manage Channel Points rewards or a game that triggers a boss fight when there’s a Hype Train. These applications need to create subscriptions and receive notifications from EventSub, but don’t always have a server available that can receive notifications over Webhooks. Ultimately, we think adding WebSockets to EventSub means you’ll be able to build applications that power new ways for creators and viewers to strengthen their communities on Twitch.
The EventSub documentation for WebSockets is now available on the Twitch developer website. There you’ll find a new guide for WebSockets and an updated API reference to support the new protocol. The Twitch CLI documentation has also been updated today to support reconnect testing for EventSub WebSockets. Additional CLI functionality is being considered as well for a future release.
Great question! We are updating our “beta” classification on the Product Lifecycle page today to indicate that, yes, you can now use Twitch developer products that are in open beta in a production environment. However, as also mentioned, it comes with the understanding that we may make breaking updates during the open beta period, which could negatively impact your implementation. While we do our best to give developers notice of changes during an open beta, it is not always a guarantee based on the type of changes necessary.
As you start testing WebSockets, we would love to hear your comments, questions, and feedback. To provide suggestions, please use the EventSub UserVoice forum. You can use the Twitch Developer Forums or the TwitchDev Discord server for questions and discussing WebSockets with other members of the community.
Many of the new subscription types we built this year were suggestions you asked for in UserVoice. Thank you for providing your feedback and helping us continue to improve EventSub.
We don’t have a firm end date to announce for the open beta at this time. At a minimum, we expect the open beta to run for several months as we continue to develop the product and as we incorporate your feedback from the open beta.