v19.0.0

[19.0.0] - revision 2026-04-15

Added

• Conversations API
  • Send an outbound message to a profile with $klaviyo->Conversations->createConversationMessage(). Supports SMS and WhatsApp — the channel is determined automatically from the
    conversation. Conversation message endpoints use the SMALL rate limit tier (3 requests/second burst, 60 requests/minute steady).
  • Retrieve the conversation thread for a given profile with $klaviyo->Profiles->getConversationForProfile(), or include it inline on profile retrievals using include: ['conversation'] on getProfile / getProfiles.

Changed

• Drag-and-drop templates
  • Create drag-and-drop email templates programmatically by setting editor_type: SYSTEM_DRAGGABLE and providing a definition body (mutually exclusive with html) via
    $klaviyo->Templates->createTemplate(). DnD template endpoints use the SMALL rate limit tier (3 requests/second burst, 60 requests/minute steady).
  • List and retrieve drag-and-drop templates with $klaviyo->Templates->getTemplates() and $klaviyo->Templates->getTemplate(). Use additional_fields_template: ['definition'] to
    include the full template definition in the response.
  • Update an existing drag-and-drop template's definition, name, or text independently via $klaviyo->Templates->updateTemplate().