Private Replies

Private Replies allows Businesses to reply to comments made on their posts with a single message on Instagram. When using this feature, the user will get a message with a reference link to the comment that is getting the reply. Private replies are allowed within 7 days of the creation date of the comment and may only be sent by a human agent.

This API will need a reference to comment id. Those references are typically obtained via webhook subscriptions to the Instagram feed field, to get this subscription the instagram_manage_comments permission is needed. See Instagram Webhooks.

curl -X POST -H "Content-Type: application/json" -d '{
  "recipient": {
    "comment_id": "17865799348089039"
  },
  "message": {
    "text": "Thanks for liking our logo! How can I help?"
  },
  "tag": "HUMAN_AGENT"     
}' "https://graph.facebook.com/v7.0/me/messages?access_token=PAGE_ACCESS_TOKEN"

Limitations

Private replies are currently not supported for Instagram live and Instagram ads comments.