curl "https://app.tatango.com/api/v2/transactional_messages" -d '{"phone_number":"2141234567","content":"Hello from Tatango!"}' -X POST \
  -H "Accept: application/json" \
  -H "Content-Type: application/json" \
  -u emailaddress@mydomain.com:my_api_key \
  -H "Host: example.org" \
  -H "Cookie: "

{
  "status": "Message successfully sent.",
  "transactional_message": {
    "id": 1,
    "number": "2835550430",
    "content": "Message content required. Max-size 5000 if is_mms",
    "status": "pending"
  }
}