To mention a user in a post, comment, or message, use <@member_id> in the content. Example:

{
  "title": "Daily standup",
  "content_markdown": "What did you work on today? cc <@3hvr0vv6fb75>, <@zwvznmxcpvel>",
  "channel_id": "7eokvf4jh5mr"
}

To get a teammate’s member ID:

  1. Click your organization name in the top left to open the dropdown.
  2. Click People.
  3. Click the ••• menu next to a user.
  4. Click Copy member ID.
IntroductionWebhooks