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Use parentId to create a reply to an existing message. The reply still targets the same subChannelId; parentId links it to the parent message for threaded rendering and reply queries.
Replies are created with the same message-type APIs as top-level messages. Set parentId before sending the text, media, or custom message.

Parameters

Reply With Text

Create a text reply by setting parentId to the message being replied to.

Reply With Media Or Custom Data

Use the same reply pattern with media or custom payloads when the reply is not plain text.

Query Reply Threads

After creating replies, query messages by parentId when you need to render a thread. See Query & Filter Messages for platform-specific query examples.

Text Message

Create text messages and text replies.

Query Messages

Query top-level messages and replies.