Changelog

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

Updated Endpoints

Voices

  • Get all voices v2
    • Added saved option to voice_type query parameter for filtering voices added to collections

Agents Platform

  • Get agent, Update agent
    • Added version_id (string, nullable) for agent version identification
    • Added branch_id (string, nullable) for agent branch identification
    • Added main_branch_id (string, nullable) for main branch reference
  • Get conversation
    • Added version_id (string, nullable) with description “The ID of the agent version used for this conversation”
  • Get batch call, Submit batch call
    • Added total_calls_finished (integer, default 0) to batch call response models
    • Expanded BatchCallRecipientStatus enum to include dispatched status
    • Made signed_url nullable for video assets

Phone Numbers