curl --request POST \
  --url http://localhost:8080/v1/batches \
  --header 'Content-Type: application/json' \
  --data '
{
  "provider": "<string>",
  "model": "<string>",
  "input_file_id": "<string>",
  "requests": [
    {
      "custom_id": "<string>",
      "method": "<string>",
      "url": "<string>",
      "body": {}
    }
  ],
  "endpoint": "/v1/chat/completions",
  "completion_window": "24h",
  "metadata": {}
}
'

{
  "id": "<string>",
  "object": "<string>",
  "endpoint": "<string>",
  "input_file_id": "<string>",
  "completion_window": "<string>",
  "status": "validating",
  "request_counts": {
    "total": 123,
    "completed": 123,
    "failed": 123
  },
  "created_at": 123,
  "expires_at": 123,
  "extra_fields": "<unknown>"
}