> ## Documentation Index
> Fetch the complete documentation index at: https://www.voiceflow.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Start session (specific environment)

> This endpoint still works but is no longer documented. The Voiceflow REST API at /v1/stable is where current integrations should start.

> [!NOTE]
>
> **This endpoint still works, but it is no longer documented.**
>
> `POST /v4/project/{projectID}/environment/{environmentID}/session` is not deprecated and continues to function. It has
> no equivalent on the [Voiceflow REST API](/docs/api-reference/api-overview.md) yet, so this
> page is kept reachable for anyone already calling it. New integrations should start
> from the REST API.


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