January 5, 2026

Agents Platform Conversation ID in Twilio/SIP webhooks: The conversation_id is now included in webhook payloads when fetching conversation initiation client data for Twilio, SIP, and WhatsApp integrations. This enables real-time monitoring without polling the API to retrieve conversation IDs.Agent versioning fields: Agent response models now include version_id, branch_id, and main_branch_id fields (nullable strings) for tracking agent versions and branches.Conversation version tracking: Added version_id field to conversation models to identify the agent version used for each conversation.Batch call enhancements: The BatchCallRecipientStatus enum now includes dispatched status, and batch call responses include total_calls_finished field with improved defaults for tracking. Voices Collection IDs: Voice models now include a collection_ids field (array of strings, nullable) indicating which collections a voice belongs to.Voice type filter expansion: The GET /v2/voices endpoint now supports saved as a voice_type filter value for retrieving non-default voices that have been added to a collection. SDK Releases Python SDK v2.28.0 - Updated API schema with agent versioning fields, voice collection IDs, batch call enhancements, and phone number labels JavaScript SDK v2.29.0 - Updated API schema with agent versioning fields, voice collection IDs, batch call enhancements, and phone number labels API