Endpoint: /v2/video/generate
Reference: https://docs.heygen.com/reference/create-an-avatar-video-v2#subtitles-object

You can now customize subtitles in avatar videos using the new subtitles object on the /v2/video/generate endpoint. This gives you more flexible, dynamic subtitle options—including preset styles, custom font sizes, position control, alignment, and highlight toggles.

Endpoint: /v1/streaming.new
Reference: https://docs.heygen.com/reference/new-session

A new parameter activity_idle_timeout has been added to the streaming.new endpoint.
It specifies the maximum idle time (in seconds) after the last user interaction before the session is marked as inactive.Default: 120 seconds, Range: 30 to 3600 seconds. This gives you greater control over session lifecycle management and resource usage.

Endpoint: /v1/streaming.keep_alive
Reference: https://docs.heygen.com/reference/keep-alive

A new /v1/streaming.keep_alive endpoint has been introduced to reset the idle timeout counter for an active streaming session. Use this endpoint to keep the session alive and prevent it from timing out due to inactivity.

Endpoint: /v1/streaming/knowledge_base/*
Reference: https://docs.heygen.com/reference/list-knowledge-bases

We’ve added new Knowledge Base Management endpoints! You can now list, create, update, and delete knowledge bases for your interactive avatars.

Endpoint: /v2/avatar/{avatar_id}/details
Reference: https://docs.heygen.com/reference/retrieve-avatar-details

We’ve added the Retrieve Avatar Details endpoint! Retrieve detailed information for a specific avatar by providing its avatar_id.

Endpoint: /v2/voices/locales
Reference: https://docs.heygen.com/reference/list-all-locales-for-voices

We’ve added the List All Locales for Voices endpoint! Retrieve a full list of available voice locales (like en-US, pt-BR, etc.) that you can use with multilingual voices when generating videos. Before using, check if the voice supports locales via the support_locale attribute from /v2/voices.

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Endpoint: /v2/streaming.list
Reference: https://docs.heygen.com/reference/list-sessions-v2

We have introduced a new v2 endpoint for listing sessions. This endpoint supports pagination and allows you to retrieve a list of all sessions with optional filtering by date range and status.

We've add support for choosing between Eleven Lab models such as eleven_flash_v2_5 or eleven_multilingual_v2. To see the trade offs either model, see: https://elevenlabs.io/docs/models

We've excited to partner with Gladia: a new speech to text provider, providing strong multi lingual support on speech recognition side.

More details here on how to configure these, see: https://docs.heygen.com/reference/new-session

Endpoint: /v1/video/share
Reference: https://docs.heygen.com/reference/retrieve-sharable-video-url

We’ve added the Retrieve Sharable Video URL endpoint! This allows you to make a video public and retrieve a public URL for easy sharing.