curl --request PATCH \
  --url https://{your-subdomain}.neetoform.com/api/external/v2/forms/{form_id}/email_notifications/{kind} \
  --header 'Content-Type: application/json' \
  --header 'X-Api-Key: <x-api-key>' \
  --data '
{
  "email_notification": {
    "is_enabled": true,
    "subject": "New submission",
    "message": "<div>Someone submitted</div>",
    "notify_emails": [
      "oliver@example.com"
    ],
    "notify_cc_emails": [
      "jsmith@example.com"
    ],
    "notify_bcc_emails": [
      "jsmith@example.com"
    ],
    "reply_to_question_id": "<string>",
    "reply_to": "jsmith@example.com",
    "send_to_question_id": "<string>"
  }
}
'

const options = {
  method: 'PATCH',
  headers: {'X-Api-Key': '<x-api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    email_notification: {
      is_enabled: true,
      subject: 'New submission',
      message: '<div>Someone submitted</div>',
      notify_emails: ['oliver@example.com'],
      notify_cc_emails: ['jsmith@example.com'],
      notify_bcc_emails: ['jsmith@example.com'],
      reply_to_question_id: '<string>',
      reply_to: 'jsmith@example.com',
      send_to_question_id: '<string>'
    }
  })
};

fetch('https://{your-subdomain}.neetoform.com/api/external/v2/forms/{form_id}/email_notifications/{kind}', 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/forms/{form_id}/email_notifications/{kind}"

payload = { "email_notification": {
        "is_enabled": True,
        "subject": "New submission",
        "message": "<div>Someone submitted</div>",
        "notify_emails": ["oliver@example.com"],
        "notify_cc_emails": ["jsmith@example.com"],
        "notify_bcc_emails": ["jsmith@example.com"],
        "reply_to_question_id": "<string>",
        "reply_to": "jsmith@example.com",
        "send_to_question_id": "<string>"
    } }
headers = {
    "X-Api-Key": "<x-api-key>",
    "Content-Type": "application/json"
}

response = requests.patch(url, json=payload, headers=headers)

print(response.text)

{
  "email_notification": {
    "kind": "admin",
    "is_enabled": true,
    "subject": "New submission",
    "notify_emails": [
      "oliver@example.com"
    ],
    "notify_cc_emails": [],
    "notify_bcc_emails": [],
    "message": "<div>Someone submitted</div>",
    "reply_to_question_id": "<string>",
    "reply_to": "<string>",
    "send_to_question_id": "<string>"
  }
}

{
  "error": "<string>"
}

{
  "error": "Form does not exist."
}

{
  "error": "Notify emails is invalid"
}