Sinch Developer Documentation release notes The RSS feed for Sinch Developer Documentation release notes https://developers.sinch.com 2026 Sinch. All rights reserved Tue, 12 May 2026 00:00:01 GMT 1800 Conversation API release notes The release notes for Conversation API https://developers.sinch.com/docs/conversation/release-notes Tue, 12 May 2026 00:00:01 GMT