Slack notification policy parameters and customization options
Last updated: December 19, 2025
When configuring Slack notification policies, you have limited customization options available. Here's what you need to know about the supported parameters and formatting.
Supported Parameters
For Slack notification policies, only the following parameters are supported:
channel_id- The Slack channel where the notification will be sentmessage- The text content of the notification
Message Formatting
The message field only supports plain text content. Advanced Slack formatting options such as:
Slack blocks
Color customization (e.g.,
colorparameter)Rich text formatting
Interactive elements
are not supported in custom Slack notification policies.
Default Notifications vs Custom Messages
There's an important distinction between notification types:
Custom message notifications: When you specify a
messageparameter, only plain text is sentDefault notifications: When you don't specify a custom message, the system uses built-in formatting that may include interactive buttons and enhanced formatting
Example Configuration
Here's a basic example of a Slack notification policy:
slack contains {
"channel_id": "C1234567890",
"message": "Your deployment has completed successfully"
}Remember that additional parameters like color, blocks, or other Slack API features will not work in this context.