Box Developer Documentation
 

    Create Reply

    Create Reply

    To create a reply to a previous comment, call the POST /comments API with the message of the new comment, as well as the ID of the previous comment to leave the reply on.

    A reply's message can also mentions users using the @ sign. To do so, add the string @[userid:name] anywhere within the message. The user_id is the target user's ID, where the name can be any custom phrase. In the Box UI this name will link to the user's profile.

    Then, pass this string as the tagged_message instead of the message.