curl --request GET \
  --url https://{your-subdomain}.neetoform.com/api/external/v2/themes/{id} \
  --header 'X-Api-Key: <x-api-key>'

const options = {method: 'GET', headers: {'X-Api-Key': '<x-api-key>'}};

fetch('https://{your-subdomain}.neetoform.com/api/external/v2/themes/{id}', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://{your-subdomain}.neetoform.com/api/external/v2/themes/{id}"

headers = {"X-Api-Key": "<x-api-key>"}

response = requests.get(url, headers=headers)

print(response.text)

{
  "theme": {
    "id": "3b0d5c1e-2f7a-4c4e-9d1b-6a8f2e7c9b10",
    "name": "Brand",
    "is_system_theme": false,
    "properties": [
      {
        "key": "background_color",
        "kind": "color",
        "value": "#ffffff"
      }
    ],
    "has_background_image": false
  }
}

{
  "error": "NeetoThemesEngine::Theme does not exist."
}