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

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

fetch('https://{your-subdomain}.neetoform.com/api/external/v2/custom_domains/{hostname}', 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/custom_domains/{hostname}"

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

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

print(response.text)

{
  "notice": "The custom domain is successfully deleted."
}

{
  "error": "NeetoCustomDomainsEngine::Domain does not exist."
}