The /bounces/tags endpoint is used to return all tags from bounced messages as a string array. This endpoint gets extremely low utilization, so we are deprecating it on December 2nd, 2019. We are reaching out to the few customers who use this endpoint directly to help them transition.
If you do have a need to filter bounces by a specific tag, a better approach is to use the /bounces endpoint with filtering, as outlined in our docs here.
If you have any questions about this, please contact our support team.
