> ## Documentation Index
> Fetch the complete documentation index at: https://heygen-1fa696a7.mintlify.app/llms.txt
> Use this file to discover all available pages before exploring further.

# More Legacy APIs

The **v1 and v2 endpoints** will remain fully supported until **October 31, 2026**. Our engineering roadmap and new feature development are focused exclusively on **v3**.

The primary distinction between the legacy endpoints and v3 lies in the [**Studio API**](https://developers.heygen.com/studio-api) and [**Template API**](https://developers.heygen.com/template-api), which are available in v2 but **not yet supported in v3**. Apart from these, the **v3 endpoints cover the full HeyGen API**, providing a unified platform for all new development. We recommend migrating all new and existing integrations to v3. Read more [**here**](https://developers.heygen.com/endpoint-version-comparison).\
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For questions about migration or enterprise support, please reach out to [HeyGen support.](https://help.heygen.com/en/)