Three major deprecations you may be impacted by beginning February 24, 2021

Hello! You are here because three monumental things changed on the Slack platform today, February 24, 2021.

What changed

These deprecation and retirements are rolling out gradually on February 24, 2021. Your apps or integrations may work fine in one workspace but break in another. Stay tuned to our Twitter account for live updates about the retirement.

Retired Web API methods

We retired every Web API method in the channels.*, im.*, mpim.*, and groups.* namespaces. Requests to these methods now return a method_deprecated error.

• Here's everything you need to know.
• This is the list of the deprecated methods and their replacements
• Upgrading to the latest Slack SDKs and tools may not be enough. You should review all your Web API method executions to verify you aren't using retired APIs like channels.list.

Events API event envelope changes

In the Events API, authed_users & authed_teams are now truncated to a single entry.

• Here's what to consider about the Events API changes.
• The new apps.event.authorizations.list method replaces relying on authed_users and authed_teams in the Events API.
• SDKs and tools don't use these fields by default. If you've written code that uses them directly, you'll want to investigate.
• If your app only uses bot/app subscriptions and is only installed on one workspace, you shouldn't have anything to worry about.

Web API method authentication changes

Newly created Slack apps and custom integrations may no longer send token as a query string parameter and must send it instead as a POST parameter or better yet, a HTTP Authorization header. Existing apps may continue doing what they already do.

• Here's what you need to know.
• If you create a new app or legacy custom integration-based bot (or hubot), you'll need to send token to us the preferred way.
• If you use a rare kind of blueprint-based app, newly created apps from that blueprint must also follow this rule.
• There is no impact to existing apps.

Need help?

We hope this is enough information for you to help yourself should any of this have taken you by surprise.

However, if you still need our help we are ready to assist you!