Integration Service Activities

Last updated Feb 19, 2026

Send Message to Channel

Project compatibility

Windows | Cross-platform

Overview

Description	API Method	API Path
Send messages to public or private Slack channels.	POST	/send_message_to_channel_v2

Input

Parameter	Description	Data Type
Channel name / ID	The names or IDs of the channel(s)	string
Message	The formatted text of the message to be sent	string
Send as	Whether to send the message as the app or as the user	string
Message fields	Key-value pairs formatted as specified	string
Button actions	Comma-separated button action properties	string
Image URL	URL of a secondary image attachment	string
Formatting options (parse)	Controls message parsing behavior (e.g., none, full)	string
Link names	Whether to automatically link and mention names	boolean
Unfurl links	Whether to show rich previews for posted links	boolean
Bot name	Name of the bot (Bot Token only)	string
Bot icon	Icon for the bot (Bot Token only)	string
Attachment image URL	URL of an image to display in the attachment	string
Attachment Title	Title of the message attachment	string
Attachment Color	Color for the attachment sidebar	string
Message Timestamp	Timestamp used to update an existing message	string
Metadata Event Type	The metadata event type for the message	string
Mrkdwn	Whether to enable markdown formatting	boolean
Unfurl Media	Whether to show previews of media links	boolean
Metadata Event Payload Title	Title field inside metadata payload	string
Metadata Event Payload ID	ID field inside metadata payload	string
Reply Broadcast	Whether a reply should also broadcast to the channel	boolean
Attachment Title Link	URL for the attachment title link	string

Output

Parameter	Description	Data Type
Channel	The output chat message object	object
Message timestamp	The ID (timestamp) of the message sent	string

In API workflows, a single response object is returned as the output. Any required fields can be extracted directly from this object.
In RPA workflows, some output parameters may differ, but the necessary values can still be retrieved from the response object even if they are not explicitly exposed.

Example

You can provide the following input for Buttons actions and Message fields:

The final Slack button message looks as follows:

When you click the Reject button, a confirmation dialog box is displayed:

You can configure the response to the above button clicks in a separate workflow using the Button Clicked event. To ensure the button is clicked only once, use Send Button Response in the workflow along with Button Clicked to replace or delete the button message after first click.

For a detailed user guide, see Use Slack Buttons when an opportunity is won in the CRM system.

On this page