attachment in Job conversation through API

We have an account with you and want to do some activities, We e-mail and submit tickets a couple of time but never get a valid response, so I would like to get this done if you providing such kind of permissions, my comment is below:

We wanted to show the attachment in Job conversation through API, We able to send the attachment to you and it's showing in JSON format that you receive but we want to show this attachment in Job history Detail Box, so could you help us to get this attachment in details Box through APIs.

Also, I attached the screenshots where you can see where we want to show our submitted attachment via your API. So, Again I am asking: we need another API to show this attachment in the Job history conversation BOX.

Hope to hear from you soon!