Unlock your productivity potential with Slack Platform
Build Slack apps
Customize your Slack experience with apps using a wide range of APIs.
Your work just works, on any device
Block Kit lets you build interfaces without a UI designer. It's available for use in surfaces across all devices without any extra code.
Stay up-to-date
The Slack Web API featured workflows methods are now available! Use the workflows.featured.add, workflows.featured.list, workflows.featured.remove, and workflows.featured.set methods to manage featured workflows programatically.
Version 3.5.1 of the developer tools for the Slack Platform has arrived! The install scripts now prompt you for feedback if an error occurs during the installation process.
We're making some changes to the entry requirements for apps submitting to the Slack Marketplace. Currently, we require that apps submitting to the Slack Marketplace have at least 10 installations on active workspaces. The goal behind this requirement is to ensure that all apps are thoroughly tested on a workspace other than the one they were built on. However, starting August 11th we will be reducing this requirement from 10 to 5 active workspaces! As part of this change, after this date we will automatically block submissions that don't meet this requirement. Please note: this requirement will not apply to apps that are already approved for the Slack Marketplace or submissions from apps that are not yet approved but are in the review process.
Version 3.5.0 of the developer tools for the Slack platform is here!
- The Bolt for JavaScript and Bolt for Python sample apps referenced in the documentation are now included in prompts of the
slack samples command, and can be filtered using the --language flag.- Samples can now be created with a provided app name using the
slack samples command with the provided app name.- We fixed a bug where the
slack run command exited with an error if activity logs failed to stream. Now, retries are attempted for those missed logs.Version 3.4.0 of the developer tools for the Slack platform is here!
- The install script and the
slack upgrade command will now automatically detect your macOS architecture and install an Intel or an Apple Silicon binary.- Outputs from erroring hook scripts, such as those found when gathering an abnormal app manifest, are no longer hidden in verbose outputs but are instead shown with invocation errors.
v2.15.1 of the Deno Slack SDKv1.4.0 of the Deno Slack Hooksv1.1.3 of the Deno Slack RuntimeWe want to update you about our previous announcement regarding the retirement of our old documentation experience on api.slack.com. We have moved the date from the end of June 2025 to the end of August 2025.