curl --request POST \
  --url https://{your-subdomain}.neetoinvoice.com/api/external/v1/clients/{client_id}/recipients \
  --header 'Content-Type: application/json' \
  --header 'X-Api-Key: <x-api-key>' \
  --data '
{
  "recipient": {
    "name": "Tim Bradford",
    "email": "tim@example.com"
  },
  "email": "oliver@example.com"
}
'

const options = {
  method: 'POST',
  headers: {'X-Api-Key': '<x-api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    recipient: {name: 'Tim Bradford', email: 'tim@example.com'},
    email: 'oliver@example.com'
  })
};

fetch('https://{your-subdomain}.neetoinvoice.com/api/external/v1/clients/{client_id}/recipients', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://{your-subdomain}.neetoinvoice.com/api/external/v1/clients/{client_id}/recipients"

payload = {
    "recipient": {
        "name": "Tim Bradford",
        "email": "tim@example.com"
    },
    "email": "oliver@example.com"
}
headers = {
    "X-Api-Key": "<x-api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

{
  "notice_code": "<string>"
}