Send message to public channel - Automate.ax

slack.sendMessageToPublicChannel posts to a public channel even when the installed bot is not a member. Prefer slack.sendMessage when the bot already belongs to the destination because it needs only chat:write.

Example

automations/post-public-slack-update.automation.ts

import { automation, onDashboardRun } from "automate.ax"
import { slack } from "automate.ax/slack"

export default automation("Post public Slack update", () => {
  onDashboardRun({ title: "Post public Slack update" })

  slack.sendMessageToPublicChannel({
    channelId: "C01234567",
    text: "Deployment completed successfully.",
  })
})

Inputs

Input	Type	Required	Description
`channelId`	`string`	Yes	Stable public-channel ID.
`text`	`string`	One content field	Plain text or accessibility fallback.
`blocks`	`Record<string, JsonValue>[]`	One content field	Up to 50 Block Kit blocks.
`attachments`	`Record<string, JsonValue>[]`	One content field	Up to 100 legacy attachments.
`unfurlLinks`	`boolean`	No	Whether Slack unfurls links.
`unfurlMedia`	`boolean`	No	Whether Slack unfurls media.

Output

Returns conversationId, the stable message timestamp, and Slack’s normalized message object. This action requires both chat:write and chat:write.public.