Actions23
- Channel Actions
- Direct Message Actions
- Message Actions
- Scheduled Message Actions
- User Actions
Message → Send Reply
AI-generatedSummary
Reply to a message in a channel.
Inputs
- channelId (required) — Choose from the list, or specify an ID using an expression.
- messageId (required) — The ID of the parent message to reply to (thread root).
- text (required) — The text content of the reply.
- asBot — Whether to post the reply as the Addon Bot identity instead of the authenticated user. Note: bots cannot reply in private channels.
- additionalFields — A JSON array of attachment objects to include with the reply.
Output shape
Execution metadata array containing the API response from the /sendReply endpoint, structured as returnJsonArray(responseData) by n8n.
Both channelId and messageId are mandatory; text must be non-empty. Attachments, if provided, must be a valid JSON array.
Examples
Example 1: Reply in a thread with attachments
channelId: 'C123', messageId: 'MSG456', text: 'Thanks!', attachments: [{name: 'file.pdf', size: 1024}], asBot: false