Slack provides 1 trigger for automating workflows based on events.
Triggers
Slack Webhook
Trigger workflow from Slack events like mentions, messages, and reactions
Configuration
| Parameter | Type | Required | Description |
|---|---|---|---|
signingSecret | string | Yes | The signing secret from your Slack app to validate request authenticity. |
botToken | string | No | The bot token from your Slack app. Required for downloading files attached to messages. |
includeFiles | boolean | No | Download and include file attachments from messages. Requires a bot token with files:read scope. |
setupWizard | modal | No | Walk through manifest creation, app install, and pasting credentials. |
Output
| Parameter | Type | Description |
|---|---|---|
event | object | Slack event data |
↳ event_type | string | Type of Slack event (e.g., app_mention, message) |
↳ subtype | string | Message subtype (e.g., channel_join, channel_leave, bot_message, file_share). Null for regular user messages |
↳ channel | string | Slack channel ID where the event occurred |
↳ channel_name | string | Human-readable channel name |
↳ channel_type | string | Type of channel (e.g., channel, group, im, mpim). Useful for distinguishing DMs from public channels |
↳ user | string | User ID who triggered the event |
↳ user_name | string | Username who triggered the event |
↳ bot_id | string | Bot ID if the message was sent by a bot. Null for human users |
↳ text | string | Message text content |
↳ timestamp | string | Message timestamp from the triggering event |
↳ thread_ts | string | Parent thread timestamp (if message is in a thread) |
↳ team_id | string | Slack workspace/team ID |
↳ event_id | string | Unique event identifier |
↳ reaction | string | Emoji reaction name (e.g., thumbsup). Present for reaction_added/reaction_removed events |
↳ item_user | string | User ID of the original message author. Present for reaction_added/reaction_removed events |
↳ hasFiles | boolean | Whether the message has file attachments |
↳ files | file[] | File attachments downloaded from the message (if includeFiles is enabled and bot token is provided) |