Slack

Send, update, delete messages, add reactions in Slack or trigger workflows from Slack events

Usage Instructions

Integrate Slack into the workflow. Can send, update, and delete messages, create canvases, read messages, and add reactions. Requires Bot Token instead of OAuth in advanced mode. Can be used in trigger mode to trigger a workflow when a message is sent to a channel.

Tools

`slack_message`

Send messages to Slack channels or direct messages. Supports Slack mrkdwn formatting.

Input

Parameter	Type	Required	Description
`authMethod`	string	No	Authentication method: oauth or bot_token
`botToken`	string	No	Bot token for Custom Bot
`channel`	string	No	Target Slack channel (e.g., #general)
`userId`	string	No	Target Slack user ID for direct messages (e.g., U1234567890)
`text`	string	Yes	Message text to send (supports Slack mrkdwn formatting)
`thread_ts`	string	No	Thread timestamp to reply to (creates thread reply)
`files`	file[]	No	Files to attach to the message

Output

Parameter	Type	Description
`message`	object	Complete message object with all properties returned by Slack
`ts`	string	Message timestamp
`channel`	string	Channel ID where message was sent
`fileCount`	number	Number of files uploaded (when files are attached)

`slack_canvas`

Create and share Slack canvases in channels. Canvases are collaborative documents within Slack.

Input

Parameter	Type	Required	Description
`authMethod`	string	No	Authentication method: oauth or bot_token
`botToken`	string	No	Bot token for Custom Bot
`channel`	string	Yes	Target Slack channel (e.g., #general)
`title`	string	Yes	Title of the canvas
`content`	string	Yes	Canvas content in markdown format

Output

Parameter	Type	Description
`canvas_id`	string	ID of the created canvas
`channel`	string	Channel where canvas was created
`title`	string	Title of the canvas

`slack_message_reader`

Read the latest messages from Slack channels. Retrieve conversation history with filtering options.

Input

Parameter	Type	Required	Description
`authMethod`	string	No	Authentication method: oauth or bot_token
`botToken`	string	No	Bot token for Custom Bot
`channel`	string	No	Slack channel to read messages from (e.g., #general)
`userId`	string	No	User ID for DM conversation (e.g., U1234567890)
`limit`	number	No	Number of messages to retrieve (default: 10, max: 15)
`oldest`	string	No	Start of time range (timestamp)
`latest`	string	No	End of time range (timestamp)

Output

Parameter	Type	Description
`messages`	array	Array of message objects from the channel

`slack_list_channels`

List all channels in a Slack workspace. Returns public and private channels the bot has access to.

Input

Parameter	Type	Required	Description
`authMethod`	string	No	Authentication method: oauth or bot_token
`botToken`	string	No	Bot token for Custom Bot
`includePrivate`	boolean	No	Include private channels the bot is a member of (default: true)
`excludeArchived`	boolean	No	Exclude archived channels (default: true)
`limit`	number	No	Maximum number of channels to return (default: 100, max: 200)

Output

Parameter	Type	Description
`channels`	array	Array of channel objects from the workspace
`ids`	array	Array of channel IDs for easy access
`names`	array	Array of channel names for easy access
`count`	number	Total number of channels returned

`slack_list_members`

List all members (user IDs) in a Slack channel. Use with Get User Info to resolve IDs to names.

Input

Parameter	Type	Required	Description
`authMethod`	string	No	Authentication method: oauth or bot_token
`botToken`	string	No	Bot token for Custom Bot
`channel`	string	Yes	Channel ID to list members from
`limit`	number	No	Maximum number of members to return (default: 100, max: 200)

Output

Parameter	Type	Description
`members`	array	Array of user IDs who are members of the channel (e.g., U1234567890)
`count`	number	Total number of members returned

`slack_list_users`

List all users in a Slack workspace. Returns user profiles with names and avatars.

Input

Parameter	Type	Required	Description
`authMethod`	string	No	Authentication method: oauth or bot_token
`botToken`	string	No	Bot token for Custom Bot
`includeDeleted`	boolean	No	Include deactivated/deleted users (default: false)
`limit`	number	No	Maximum number of users to return (default: 100, max: 200)

Output

Parameter	Type	Description
`users`	array	Array of user objects from the workspace
`ids`	array	Array of user IDs for easy access
`names`	array	Array of usernames for easy access
`count`	number	Total number of users returned

`slack_get_user`

Get detailed information about a specific Slack user by their user ID.

Input

Parameter	Type	Required	Description
`authMethod`	string	No	Authentication method: oauth or bot_token
`botToken`	string	No	Bot token for Custom Bot
`userId`	string	Yes	User ID to look up (e.g., U1234567890)

Output

Parameter	Type	Description
`user`	object	Detailed user information

`slack_download`

Download a file from Slack

Input

Parameter	Type	Required	Description
`authMethod`	string	No	Authentication method: oauth or bot_token
`botToken`	string	No	Bot token for Custom Bot
`fileId`	string	Yes	The ID of the file to download
`fileName`	string	No	Optional filename override

Output

Parameter	Type	Description
`file`	file	Downloaded file stored in execution files

`slack_update_message`

Update a message previously sent by the bot in Slack

Input

Parameter	Type	Required	Description
`authMethod`	string	No	Authentication method: oauth or bot_token
`botToken`	string	No	Bot token for Custom Bot
`channel`	string	Yes	Channel ID where the message was posted (e.g., C1234567890)
`timestamp`	string	Yes	Timestamp of the message to update (e.g., 1405894322.002768)
`text`	string	Yes	New message text (supports Slack mrkdwn formatting)

Output

Parameter	Type	Description
`message`	object	Complete updated message object with all properties returned by Slack
`content`	string	Success message
`metadata`	object	Updated message metadata

`slack_delete_message`

Delete a message previously sent by the bot in Slack

Input

Parameter	Type	Required	Description
`authMethod`	string	No	Authentication method: oauth or bot_token
`botToken`	string	No	Bot token for Custom Bot
`channel`	string	Yes	Channel ID where the message was posted (e.g., C1234567890)
`timestamp`	string	Yes	Timestamp of the message to delete (e.g., 1405894322.002768)

Output

Parameter	Type	Description
`content`	string	Success message
`metadata`	object	Deleted message metadata

`slack_add_reaction`

Add an emoji reaction to a Slack message

Input

Parameter	Type	Required	Description
`authMethod`	string	No	Authentication method: oauth or bot_token
`botToken`	string	No	Bot token for Custom Bot
`channel`	string	Yes	Channel ID where the message was posted (e.g., C1234567890)
`timestamp`	string	Yes	Timestamp of the message to react to (e.g., 1405894322.002768)
`name`	string	Yes	Name of the emoji reaction (without colons, e.g., thumbsup, heart, eyes)

Output

Parameter	Type	Description
`content`	string	Success message
`metadata`	object	Reaction metadata

Triggers

`slack_webhook`

Trigger workflow from Slack events like mentions, messages, and reactions

Output

Parameter	Type	Description
`event.event_type`	string	Type of Slack event (e.g., app_mention, message)
`event.channel`	string	Slack channel ID where the event occurred
`event.channel_name`	string	Human-readable channel name
`event.user`	string	User ID who triggered the event
`event.user_name`	string	Username who triggered the event
`event.text`	string	Message text content
`event.timestamp`	string	Message timestamp from the triggering event
`event.thread_ts`	string	Parent thread timestamp (if message is in a thread)
`event.team_id`	string	Slack workspace/team ID
`event.event_id`	string	Unique event identifier

Notes

Category: tools
Type: slack

Slack

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