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Slack is a leading business communication platform that brings teams together with real-time messaging, channels, and integrations. Cargo’s native integration with Slack allows you to send messages, notifications, and alerts directly to channels or users as part of your workflows.

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How to set up Slack

Slack uses OAuth to establish the connection with Cargo. During connection, you’ll be asked to authorize Cargo to access your Slack workspace. Once redirected and the connector is created, you can:
  • Send messages from workflows — Send notifications, alerts, and updates to Slack channels or users directly from your Plays, Tools, or Agents.
  • Keep teams informed — Automate real-time notifications for important events like new leads, deal updates, or workflow completions.
  • Talk to Cargo agents in Slack — Mention the Cargo app in a watched channel, or DM it, and the agent replies in thread with Slack’s native thinking state, stop button, and streamed text.
Slack’s Agents & Tools directory lists Cargo as one app. Each Cargo agent still shows its own name and icon in the thread. Reconnect the Slack connector to pick up native thinking, stop, and streamed replies; until then the previous placeholder-then-edit behaviour stays in place.

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Slack actions

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Send message to channel

Post a message to a public or private Slack channel. Use cases
  • Team notifications – Alert your sales team when a high-value lead enters the pipeline
  • Deal updates – Post to a deals channel when opportunities progress through stages
  • Workflow alerts – Notify teams when automated workflows complete or require attention
Use Slack’s Block Kit formatting to create rich, interactive messages with buttons, sections, and more.

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Send direct message

Send a private message directly to a Slack user. Use cases
  • Personal notifications – Notify a specific rep when they’re assigned a new lead
  • Task reminders – Send individual reminders for follow-ups or pending actions
  • Escalations – Alert managers directly when deals need attention

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Post threaded reply

Reply to an existing message in a thread. Use cases
  • Conversation continuity – Keep related updates organized in threads
  • Status updates – Add progress updates to existing notification threads
  • Collaborative workflows – Build context over time within a single thread
To post a threaded reply, you’ll need the thread_ts (timestamp) of the parent message. This can be captured from a previous Send message action.

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Message formatting

Slack supports rich text formatting using markdown-like syntax:
Ensure the Cargo app has been invited to private channels before attempting to post messages. The bot cannot access channels it hasn’t been added to.