Does the metadata field in Response API appear in webhook payloads?

API
1

Hello everyone,

I’m integrating OpenAI’s Response API with the new webhook feature and I want to confirm an implementation detail.

According to the documentation, when creating a response, we can include a metadata object to store custom data (e.g., database IDs, session info).
This metadata is returned when fetching the response directly via API.

Question
Does this metadata object also appear in the webhook payload when the response is completed and sent to my endpoint?
If not, is there any setting or option to enable it?

Example request

POST https://api.openai.com/v1/responses
{
  "model": "gpt-4.1-mini",
  "temperature": 1,
  "max_output_tokens": 1000,
  "store": true,
  "background": true,
  "input": [
    {
      "role": "user",
      "content": "Hello"
    }
  ],
  "tools": [],
  "tool_choice": "auto",
  "metadata": {
    "chatId": 123
  }
}

What I currently receive on my webhook endpoint:

{
  "id": "evt_345",
  "object": "event",
  "created_at": 1755216471,
  "type": "response.completed",
  "data": {
    "id": "resp_123"
  }
}

Is it possible to also receive the metadata in the webhook payload?
Thanks!