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Changelog

July 28, 2025

Workspaces

  • Service account API key management: Added comprehensive API endpoints for managing service account API keys, including creation, retrieval, updating, and deletion capabilities. See Service Accounts documentation.

Conversational AI

  • Post-call webhook migration: The post call webhook format is being migrated so that webhook handlers can be auto generated in the SDKs. This is not a breaking change, and no further action is required if your current handler accepts additional fields. Please see more information here.
  • Agent transfer improvements: Fixed system variable system_agent_id to properly update after agent-to-agent transfers, ensuring accurate conversation context tracking. Added new system_current_agent_id variable for tracking current active agent. Learn more about dynamic variables.
  • Enhanced public agent page: Added text input functionality and dynamic variable support to the public talk-to-agent page. You can now pass dynamic variables via URL parameters (e.g., ?var_username=value) and use text input during voice conversations. See dynamic variables guide.
  • Voicemail detection: Added voicemail detection as a built-in tool for conversational AI agents to improve call handling. Learn about voicemail detection.
  • Conversation filtering: Added user_id query parameter to conversation list endpoint for filtering conversations by initiating user.

Speech to Text

  • Multi-channel transcription: Added use_multi_channel parameter to transcription endpoint for processing audio files with multiple speakers on separate channels. Supports up to 5 channels with per-channel transcription results. See multichannel guide.

Studio

  • Caption support: Added caption functionality to Studio projects with new captions_enabled and caption_style properties for both podcasts and general projects. Learn more about Studio.

SDKs

API Schema Updates

New Endpoints

  • Service Account Management: Added 5 new endpoints for service account API key management:
    • GET /v1/service-accounts/{service_account_user_id}/api-keys - Retrieve service account API keys
    • POST /v1/service-accounts/{service_account_user_id}/api-keys - Create service account API key
    • DELETE /v1/service-accounts/{service_account_user_id}/api-keys/{api_key_id} - Delete service account API key
    • PATCH /v1/service-accounts/{service_account_user_id}/api-keys/{api_key_id} - Update service account API key
    • GET /v1/service-accounts - Get workspace service accounts

Removed Endpoints

  • Legacy Project Endpoints: Removed 22 deprecated project management endpoints as part of Studio API consolidation:
    • All /v1/projects/* endpoints (replaced by /v1/studio/projects/*)
    • Legacy Text to Voice endpoints (/v1/text-to-voice/create-voice-from-preview, /v1/text-to-voice/remixing-sessions/*)
    • Legacy ConvAI knowledge base endpoints

Updated Endpoints

Speech to Text

  • Multi-channel support: Updated /v1/speech-to-text endpoint:
    • Added use_multi_channel parameter for processing multi-speaker audio files
    • Modified response structure to include optional language_code, language_probability, text, and words properties

Conversational AI

  • Enhanced agent configuration: Updated agent creation and management endpoints:
    • Added voicemail detection to built-in tools
    • Improved RAG configuration with max_retrieved_rag_chunks_count parameter
    • Enhanced conversation token endpoint with source and version parameters
    • Added user_id filtering to conversations list endpoint

Studio Projects

  • Caption support: Updated Studio project endpoints to include:
    • captions_enabled property for enabling/disabling captions
    • caption_style property for global caption styling configuration

Text to Voice

  • Improved voice generation: Enhanced voice creation endpoints with:
    • loudness control (-1 to 1 range, 0 corresponds to -24 LUFS)
    • quality parameter for balancing output quality vs variety
    • guidance_scale parameter for controlling AI creativity vs prompt adherence