Stylo Docs

slack/send-message — Send a message to a Slack channel.

Where it appears

The Send Slack Message block lives in the Integrations group of the Workflow Builder. Connect the Slack integration before adding it.

Field	Type	Required	Default	Description
`slackChannel`	text (supports references)	Yes	—	Target Slack channel, given as a `#channel-name` or a channel ID (e.g. `C01234567`). Use literal text or <StepName.field>.
`slackMessage`	text (multi-line, supports references)	Yes	—	Text of the Slack message to post. Supports Slack mrkdwn formatting. Use literal text or <StepName.field> to reference upstream content.

Inputs are the configurable fields above. The block produces these outputs:

Outputs

Reference an output downstream with <Send Slack Message.field>.

Name	Type	Description
`success`	boolean	Whether message was sent successfully
`ts`	string	Timestamp of the message
`channel`	string	Channel where message was sent
`error`	string	Error message if sending failed

A minimal configuration for this block:

{
  "type": "slack/send-message",
  "config": {
    "slackChannel": "<PreviousStep.field>",
    "slackMessage": "<PreviousStep.field>"
  }
}

Requires a connected Slack integration. Calls fail if that integration is disconnected or its authorization has expired.
Required fields (slackChannel, slackMessage) must be set, or the block fails validation before it runs.
On failure the error output is populated; downstream blocks that reference other outputs may not receive values.