Unable to get thumbnail id from endpoint /rest/api/3/attachment/thumbnail/{id}

[v-mchette]

I used to read the thumbnail id of an attachment in a Jira workitem. From couple of weeks, I am not getting thumbnailid from the response headers from above rest endpoint. Suggest an alternate to find get thumbnail id, so that I can update jira workitem with the thumbnails in the adf content. Currently our application is breaking since we don't get thumbnail from API.

[Joseph Chung Yin]

@v-mchette -

I have not experience this issue at this time.  I would recommend you to contact Atlassian Support team (https://support.atlassian.com) for assistance as the documentation page still showing the REST API (v3) are valid -

https://developer.atlassian.com/cloud/jira/platform/rest/v3/api-group-issue-attachments/#api-group-issue-attachments

For your REST APIs call - the account that you use to authenticate connection - Does it have all the proper permissions (as stated in REST APIs documentation)?

Permissions required: For the issue containing the attachment:

• Browse projects project permission for the project that the issue is in.
• If issue-level security is configured, issue-level security permission to view the issue.
• If attachments are added in private comments, the comment-level restriction will be applied.

Hope this helps.  Sorry.

Best, Joseph Chung Yin

[v-mchette]

No, that might not be due to lack of user permissions. I have admin privileges on the Jira instance. And the application used to receive the thumbnail id from jira rest api. I need to update the Jira workitem using rest api, so I need the thumbnail so that image preview is available when I update workitem using rest api. Without thumbnail, if the jira workitem is updated thumbnail is not updated and image is broken