Mailchimp Export API 1.0 and 2.0
Mailchimp retired Export API 1.0 and API 2.0 on June 1, 2023. These endpoints now return HTTP 410 status messages. Applications must migrate to Marketing API 3.0, which was originally announced as the replacement when Export API 1.0 and 2.0 were deprecated on December 31, 2016.