Alerts Use-Case: Raw Output Type

The Slack destination type requires you to select between Structured and Raw output type.

For maximum customization, Go to Integrations > Notification Center > Presets > New alert preset, then open the Advanced tab in Message to view or edit the underlying template schema and variables. In this mode, the message schema is configured directly using a JSON payload. The templates within the payload are rendered, and the resulting message is sent as-is to the Slack API.

To create a custom Raw Slack message, paste the required fields from your Slack app’s Block Kit or existing notification templates into a clean JSON file.