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Slack

Send messages to Slack channels and DM users from any automation. React to messages, manage channels, upload files, and handle app mentions — all via the Slack Web API.

Authentication

Auth type: Bot token (OAuth 2.0) Create a Slack app at api.slack.com/apps. Add bot token scopes: chat:write, chat:write.public, im:write, channels:join, channels:manage, channels:read, reactions:write, files:write. Install the app to your workspace and copy the Bot User OAuth Token (xoxb-...).

Triggers

Triggers require configuring Slack Event Subscriptions in your app settings, pointing to your Collabase webhook endpoint.

Actions

Use the channel’s ID (e.g. C012AB3CD), not its display name, for reliable delivery. Right-click the channel in Slack → Copy link — the last URL segment is the ID.
Last modified on April 2, 2026