This document explains what you have to do before using the Kakao Talk Message APIs.
Kakao Talk Share webhook is a function that informs you that the message has been successfully sent to the selected friends or chatroom through the specified webhook URL.
To use this function,
To see the details on the webhook request, refer to Reference Information > Kakao Talk Share webhook.
The Kakao Talk Message API returns the message send result in the response, so a separate webhook feature is not required.
If your service uses Kakao Talk Share webhook, you must allow Kakao IP addresses.
If you want to configure a preview page before sending a Kakao Talk Share message, you must allow firewall exceptions as described in DevTalk. Otherwise, it takes much time to send a Kakao Talk Share message or an image is not displayed because your service server blocks the Kakao scrapping server.