curl --request POST \
  --url https://{your-subdomain}.neetoform.com/api/external/v2/forms/{form_id}/submissions/send_responses \
  --header 'Content-Type: application/json' \
  --header 'X-Api-Key: <x-api-key>' \
  --data '
{
  "ids": [
    "2c7f4a1e-6a0b-4d7e-9c55-1b3c9f0d8e21"
  ],
  "email_question_id": "<string>",
  "subject": "Thanks for your response",
  "body": "<p>Hi, we got your response.</p>",
  "cc_emails": [
    "oliver@example.com"
  ],
  "bcc_emails": [
    "jsmith@example.com"
  ]
}
'

const options = {
  method: 'POST',
  headers: {'X-Api-Key': '<x-api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    ids: ['2c7f4a1e-6a0b-4d7e-9c55-1b3c9f0d8e21'],
    email_question_id: '<string>',
    subject: 'Thanks for your response',
    body: JSON.stringify('<p>Hi, we got your response.</p>'),
    cc_emails: ['oliver@example.com'],
    bcc_emails: ['jsmith@example.com']
  })
};

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

payload = {
    "ids": ["2c7f4a1e-6a0b-4d7e-9c55-1b3c9f0d8e21"],
    "email_question_id": "<string>",
    "subject": "Thanks for your response",
    "body": "<p>Hi, we got your response.</p>",
    "cc_emails": ["oliver@example.com"],
    "bcc_emails": ["jsmith@example.com"]
}
headers = {
    "X-Api-Key": "<x-api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

{
  "queued": true,
  "submission_ids": [
    "<string>"
  ]
}

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

{
  "error": "None of the given submission_ids belong to this form."
}