Breaking changes are already here for the stars and reminders APIs

Published:Thursday, July 6, 2023

Starting in March 2023, Slack began rolling out a new collection of features collectively called Save it for Later. It gives you a new Later section on Slack where things you save for later (with or without a reminder attached to it) are kept.

This new collection of features replaces our previous Saved Items (also known as starred items, or just stars) and Reminders features.

As part of this new feature roll out, the existing APIs to interface with saved items and reminders have become degraded or useless. There are no direct APIs for Save it for Later to integrate with. With the current suite of built-in functions, web API methods, events, and triggers offered by Slack it is possible to recreate some (but certainly not all) use cases the impacted APIs supported.

We aim to give ample notice for every platform feature developers would consider a β€œbreaking change.” We apologize we were unable to provide this information to developers ahead of the Save it for Later release.

What changed?

Beginning March 2023, a number of APIs around saved items and reminders began to degrade as the new Save it for Later feature was made available to workspaces.

  • reminders.add - Reminders can only be set for another user with a bot token. The user argument is ignored and is effectively retired for user tokens.
  • stars.list - Users no longer can create stars or saved items in the same way previously supported. This method is somewhat frozen in time and will not accurately reflect items the user would find in their Later tab. We will retire this method in September 2023.
  • stars.add and stars.remove - They will function but every act performed will have no user-facing impact. We will retire these methods in September 2023.

How do I prepare?

If your app relies on these methods, we recommend retiring the functionality in your app. APIs for Save it for Later are not yet available and we don’t have a timeline for when or if they'll be made available.

To create reminders for users, use the scheduled trigger functionality built into workflow builder and our new developer automation platform.

What if I do nothing?

The stars.* Web API methods will continue responding to your requests until they are retired on September 2023. The Saved Items your app or integration work with using these methods won't be user-visible or impact the Later feature on Slack. Items a user stores with Later will not be returned to your app. Beginning September 2023, the API methods will return a method_deprecated error.

If you try to specify a user with reminders.add it will ignore the argument unless your app is using a bot token. Reminders will always be created for the same user who owns the token used to call reminders.add.

When does this happen?

Save it for Later began gradually rolling out to users in March 2023. Everyone has it now. Expect the APIs mentioned above to be marked deprecated and set for retirement in September 2023.


If you have questions or concerns about this surprise deprecation and retirement, please contact us. We'll do better next time!

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