Slack Schedule Message

• textstring
  This sends raw text only, use markdown_text field for formatting. Primary text of the message; formatting with `mrkdwn` applies. Required if `blocks` and `attachments` are not provided.
• parsestring
  Message text treatment: `full` for special formatting, `none` otherwise (default). See Slack's `chat.postMessage` docs for options.
• blocksstring
  **DEPRECATED**: Use `markdown_text` field instead. JSON array of structured blocks as a URL-encoded string for message layout and design. Required if `text` and `attachments` are not provided.
• channelstring
  Channel, private group, or DM channel ID (e.g., C1234567890) or name (e.g., #general) to send the message to. Bot must be a member of the target channel; missing membership returns `not_in_channel` error. **IMPORTANT:** org-wide (Enterprise Grid) tokens cannot resolve channel na…
• post_atstring
  Unix EPOCH timestamp (integer seconds since 1970-01-01 00:00:00 UTC) for the future message send time. Must be strictly greater than current time (past values return `time_in_past` error). Always convert local times to UTC epoch seconds before use; Slack evaluates in UTC only.
• thread_tsstring
  Timestamp of the parent message for the scheduled message to be a thread reply. Must be float seconds (e.g., `1234567890.123456`).
• link_namesboolean
  Pass true to automatically link channel names (e.g., #general) and usernames (e.g., @user). NOTE: This parameter is deprecated by Slack; the linking behavior is primarily controlled by Slack's default message parsing. For explicit control, use the 'parse' parameter instead (set…
• attachmentsstring
  This is Slack's legacy 'secondary attachments' field for adding rich formatting elements like colored sidebars, structured fields, and author info. Pass as a JSON string array. NOT for file/image uploads. To send files or images, use 'SLACK_UPLOAD_OR_CREATE_A_FILE_IN_SLACK' inst…
• unfurl_linksboolean
  Pass false to disable automatic link unfurling. Defaults to true. NOTE: Due to a known Slack API limitation, this parameter may not be respected for scheduled messages (works correctly for chat.postMessage but may be ignored by chat.scheduleMessage).
• unfurl_mediaboolean
  Pass false to disable automatic media unfurling. Defaults to true. NOTE: Due to a known Slack API limitation, this parameter may not be respected for scheduled messages (works correctly for chat.postMessage but may be ignored by chat.scheduleMessage).
• markdown_textstring
  **PREFERRED**: Write your scheduled message in markdown for nicely formatted display. Supports headers (#), bold (**text**), italic (*text*), strikethrough (~~text~~), code (```), links ([text](url)), quotes (>), and dividers (---). Your message will be posted with beautiful for…
• reply_broadcastboolean
  With `thread_ts`, makes reply visible to all in channel, not just thread members. Defaults to `false`.

• data

  Required
  Data from the action execution
• errorstring
  Error if any occurred during the execution of the action
• successfulboolean

  Required
  Whether or not the action execution was successful or not

No verified related use cases are linked yet.

No published Skills explicitly reference this Action yet.