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Yandex AI Studio
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          • Overview
          • realtime.server.error
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  • Quotas and limits
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In this article:

  • HTTP request
  • Body parameters
  • RealtimeSession
  • Response
  1. API references
  2. OpenAI-compatible APIs
  3. Realtime
  4. Server events
  5. realtime.server.session.created

REST: session.created

Written by
Yandex Cloud
Updated at December 30, 2025
  • HTTP request
  • Body parameters
  • RealtimeSession
  • Response

HTTP requestHTTP request

POST https://ai.api.cloud.yandex.net/v1/realtime/server-events/session.created

Body parametersBody parameters

Request schema: application/json

{
  "type": "string",
  "event_id": "string",
  "session": {
    "type": "string",
    "object": "string",
    "id": "string",
    "model": "string",
    "output_modalities": [
      "string"
    ],
    "instructions": "string",
    "tools": [
      {}
    ],
    "turn_detection": {},
    "input_audio_transcription": {},
    "voice": "string | null",
    "audio": {}
  }
}

Returned when a Session is created. Emitted automatically when a new connection is established as the first server event. Contains the default Session configuration.

Field

Description

type

enum

Required field. The event type, must be session.created.

  • session.created

event_id

string

Required field. The unique ID of the server event.

session

RealtimeSession

Required field. Realtime session configuration object.

RealtimeSessionRealtimeSession

Realtime session configuration object.

Field

Description

type

enum

Required field. The type of session. Always realtime for the Realtime API.

  • realtime
  • transcription

object

string

Object type identifier (e.g., realtime.session).

id

string

Unique identifier of the Realtime session.

model

string

Model used to generate responses during the session. Currently, only gpt://{YANDEX_CLOUD_FOLDER_ID}/speech-realtime-250923 is supported.

output_modalities[]

string

instructions

string

Default system instructions prepended to model calls. Used to guide response content, format, and audio behavior.

tools[]

ToolsItem

turn_detection

TurnDetection

Server-side turn detection (VAD) configuration for audio input.

input_audio_transcription

InputAudioTranscription

Configuration for transcribing input audio.

voice

string | null

Voice identifier for audio output.

audio

Audio

Configuration for input and output audio.

ResponseResponse

HTTP Code: 200

OK

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