A API oficial do WhatsApp para o seu sistema

import requests

url  = "https://api.covercut.com.br/api/v1/messages/send"
headers = {
    "X-API-Key":    "sua_api_key",
    "X-API-Secret": "seu_api_secret",
    "Content-Type": "application/json"
}
payload = {
    "to":   "5547999999999",
    "type": "text",
    "text": { "body": "Olá! Como posso ajudar?" }
}

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

const res = await fetch(
  "https://api.covercut.com.br/api/v1/messages/send",
  {
    method: "POST",
    headers: {
      "X-API-Key":    "sua_api_key",
      "X-API-Secret": "seu_api_secret",
      "Content-Type": "application/json",
    },
    body: JSON.stringify({
      to:   "5547999999999",
      type: "text",
      text: { body: "Olá! Como posso ajudar?" }
    }),
  }
);
const data = await res.json();