Schedule message - Automate.ax

scheduleMessage asks Slack to deliver a message later, up to 120 days in the future. It can schedule a top-level message or a thread reply.

Example

automations/schedule-slack-message.automation.ts

import { automation } from "automate.ax"
import { scheduleMessage } from "automate.ax/slack"

export default automation("Schedule Slack reminder", () => {
  scheduleMessage({
    conversation: "C01234567",
    postAt: new Date("2026-08-12T16:00:00Z"),
    text: "Time for the weekly review.",
  })
})

Inputs

Input	Type	Required	Description
`conversation` / `channel`	`string`	Yes	Destination aliases; if both are present, they must match.
`postAt`	`Date \| number`	Yes	Delivery time as a Date or Unix timestamp in seconds. Dates are floored to whole seconds.
`threadTimestamp`	`string`	No	Parent timestamp for a scheduled thread reply.
`text`, `blocks`, `attachments`	Slack message content	At least one	Message content.
`unfurlLinks`, `unfurlMedia`	`boolean`	No	Slack unfurl behavior.
`account`	`string \| IntegrationAccountReference<"slack">`	No	Slack binding.

Output

Returns conversationId, postAt, scheduledMessageId, and Slack’s optional provider-native message preview. Save scheduledMessageId with conversationId; Cancel scheduled message needs both.

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