Best practice for retrieving comments including Attachments and URL's with API

[Ward Schwillens_ Schwillie]

What is the best practice for retrieving comments including Attachments and URL's with API. I'm setting up integration between Jira and our Customer Support system. 

Whenever a ticket in the customer support system is to be assigned to our department, a Jira issue is created using API. We are sending back updates on the Jira issue to the Customer Support system using Jira automation and the Support's system API.

Now, when a user of our department add a comment to the issue, and the comment contains, an attachment of some type or an URL, the API call fails. 

What is the best practice to retrieve a comment that contains file attachments or URL's? 

Thank you for your insights!