API Reference

Realtime

Client Secrets

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Create client secret

realtime.client_secrets.create(ClientSecretCreateParams**kwargs) -> ClientSecretCreateResponse

POST/realtime/client_secrets

Create a Realtime client secret with an associated session configuration.

Client secrets are short-lived tokens that can be passed to a client app, such as a web frontend or mobile client, which grants access to the Realtime API without leaking your main API key. You can configure a custom TTL for each client secret.

You can also attach session configuration options to the client secret, which will be applied to any sessions created using that client secret, but these can also be overridden by the client connection.

Learn more about authentication with client secrets over WebRTC.

Returns the created client secret and the effective session object. The client secret is a string that looks like ek_1234.

ParametersExpand Collapse

expires_after: Optional[ExpiresAfter]

Configuration for the client secret expiration. Expiration refers to the time after which a client secret will no longer be valid for creating sessions. The session itself may continue after that time once started. A secret can be used to create multiple sessions until it expires.

session: Optional[Session]

Session configuration to use for the client secret. Choose either a realtime session or a transcription session.

ReturnsExpand Collapse

class ClientSecretCreateResponse: …

Response from creating a session and client secret for the Realtime API.

expires_at: int

Expiration timestamp for the client secret, in seconds since epoch.

formatunixtime

session: Session

The session configuration for either a realtime or transcription session.

value: str

The generated client secret value.

Create client secret

Python

HTTP

Python

TypeScript

Go

Ruby

Java

CLI Tool

import os
from openai import OpenAI

client = OpenAI(
    api_key=os.environ.get("OPENAI_API_KEY"),  # This is the default and can be omitted
)
client_secret = client.realtime.client_secrets.create()
print(client_secret.expires_at)

{
  "value": "ek_68af296e8e408191a1120ab6383263c2",
  "expires_at": 1756310470,
  "session": {
    "type": "realtime",
    "object": "realtime.session",
    "id": "sess_C9CiUVUzUzYIssh3ELY1d",
    "model": "gpt-realtime",
    "output_modalities": [
      "audio"
    ],
    "instructions": "You are a friendly assistant.",
    "tools": [],
    "tool_choice": "auto",
    "max_output_tokens": "inf",
    "tracing": null,
    "truncation": "auto",
    "prompt": null,
    "expires_at": 0,
    "audio": {
      "input": {
        "format": {
          "type": "audio/pcm",
          "rate": 24000
        },
        "transcription": null,
        "noise_reduction": null,
        "turn_detection": {
          "type": "server_vad",
        }
      },
      "output": {
        "format": {
          "type": "audio/pcm",
          "rate": 24000
        },
        "voice": "alloy",
        "speed": 1.0
      }
    },
    "include": null
  }
}

Returns Examples

{
  "value": "ek_68af296e8e408191a1120ab6383263c2",
  "expires_at": 1756310470,
  "session": {
    "type": "realtime",
    "object": "realtime.session",
    "id": "sess_C9CiUVUzUzYIssh3ELY1d",
    "model": "gpt-realtime",
    "output_modalities": [
      "audio"
    ],
    "instructions": "You are a friendly assistant.",
    "tools": [],
    "tool_choice": "auto",
    "max_output_tokens": "inf",
    "tracing": null,
    "truncation": "auto",
    "prompt": null,
    "expires_at": 0,
    "audio": {
      "input": {
        "format": {
          "type": "audio/pcm",
          "rate": 24000
        },
        "transcription": null,
        "noise_reduction": null,
        "turn_detection": {
          "type": "server_vad",
        }
      },
      "output": {
        "format": {
          "type": "audio/pcm",
          "rate": 24000
        },
        "voice": "alloy",
        "speed": 1.0
      }
    },
    "include": null
  }
}