Example

curl https://api.openai.com/v1/conversations \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $OPENAI_API_KEY" \
  -d '{
    "metadata": {"topic": "demo"},
    "items": [
      {
        "type": "message",
        "role": "user",
        "content": "Hello!"
      }
    ]
  }'

Response

{
  "id": "conv_123",
  "object": "conversation",
  "created_at": 1741900000,
  "metadata": {"topic": "demo"}
}