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

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

fetch('https://{your-subdomain}.neetoinvoice.com/api/external/v2/clients', 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/v2/clients"

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

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

print(response.text)

{
  "total_count": 1,
  "page": 1,
  "page_size": 30,
  "total_pages": 1,
  "next_page": null,
  "prev_page": null,
  "clients": [
    {
      "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "identifier": "a8b90a464cad12b48e45",
      "name": "<string>",
      "secondary_name": "<string>",
      "status": "active",
      "currency": "USD",
      "default_invoice_due_in_days": 30
    }
  ]
}