Open url with attachment button

Troubleshooting
1

Hello

How can I add a button attachment that opens a link? This can be done in Slack and Teams, I wonder if there is a way to accomplish it in Mattermost. Currently it sends an HTTP POST request.

{
	"attachments": [
    {
      "actions": [
        {
          "name": "Ephemeral Message",
          "integration": {
            "url": "http://mattermost.org"
          }
        }
      ]
    }
  ]
}