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Use Slack when you want a workflow step to send messages, read channel history, list channels, search messages, or manage related Slack activity from a connected account.

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Configuration

Before you configure this step, connect Slack in Integrations for your workspace using the OAuth flow. If no active connection is available, the step shows a warning with a link to Integrations instead of the account selector.

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Arguments form

When you select an action, the Arguments section automatically renders a form driven by the action’s input schema. Each field includes:
  • A label and description from the action’s schema.
  • An Insert Variable button next to eligible fields that injects references like {{step_1.output.id}} at the cursor position.
  • Validation feedback inline if a required field is left empty.
Switch to the Raw JSON tab for power users or when you prefer to write the full arguments object by hand. Changes in either tab stay in sync. Channel fields often support a picker populated from your connected workspace. Prefer channel IDs when the action requires them.

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Common actions

Destructive actions such as deleting messages, deleting channels, or removing users are not exposed in the workflow action picker.

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Output

This step stores the Slack API response as the step output. The shape of the response depends on the action. Use the full output reference in later steps:
For example, after a Send Message step you might reference fields from the returned payload:

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Example

  1. Open Integrations and connect Slack if you have not already done that.
  2. Add a Slack step to your workflow.
  3. Select a connected account in Authentication.
  4. Choose Fetch Conversation History in Action to collect channel messages, or Send Message to post.
  5. In the Arguments form, fill in the channel and any message text. Use Insert Variable to reference an earlier step’s output for any field value.
  6. Click Run in the step header to test the action, then review the returned payload in Output.

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Notes

  • This step depends on a connected Slack integration in your workspace.
  • The workflow action picker shows a curated subset of Slack actions. Agents with the Slack tool can access additional safe actions.
  • OAuth may show third-party authorization branding during the connect flow.
  • If you previously connected Slack before the multi-action update, reconnect Slack in Integrations so the account can use the expanded action set.

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Using Slack as an Agent Tool

You can also add Slack as a tool in the Agent Editor. Open the agent, click Add tool, and select Slack. In the tool settings panel, choose the connected account the agent should use. The agent will call Slack actions automatically during conversations when relevant. See also: Integrations, Creating and Editing, and Testing and Iteration