curl --request POST \
  --url https://api.deepl.com/v2/admin/developer-keys \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "label": "developer key prod"
}
'

{
  "key_id": "ca7d5694-96eb-4263-a9a4-7f7e4211529e:20c2abcf-4c3c-4cd6-8ae8-8bd2a7d4da38",
  "label": "developer key prod",
  "creation_time": "2025-07-08T08:15:29.362Z",
  "deactivated_time": "2025-07-09T08:15:29.362Z",
  "is_deactivated": true,
  "usage_limits": {
    "characters": 5000,
    "speech_to_text_milliseconds": 3600000,
    "speech_to_speech_milliseconds": 3600000
  }
}

{
  "message": "<string>",
  "code": "invalid_content_type"
}

{
  "message": "<string>",
  "code": "invalid_content_type"
}

{
  "message": "<string>",
  "code": "invalid_content_type"
}

{
  "message": "<string>",
  "code": "invalid_content_type"
}