Slack

The Slack integration posts messages into a workspace, and is one of the two places a paused automation can ask a person a question.

What it gives you

Node	What it does
Slack Message action	Posts a message to a user or channel, written as rich text, markdown, Slack blocks, or raw Block Kit JSON.

Slack is also a human-in-the-loop provider. An AI step configured to pause pushes its question into Slack as an interactive message with the buttons or inputs the question calls for, and streams the agent's progress alongside it. Whoever answers, wherever they answer—in Slack, in another channel, or from the approvals inbox—the others update to show it has been resolved.

What it needs

A Slack connection, which is an app installed into your workspace. An administrator creates that app once; after that the connection is reused like any other.