Calculate SMS credits for a number and message

curl -X POST 'https://api.expiryedge.com/v1/calculateSMSCost' \
  -H "Content-Type: application/json" \
  -d '{
  "phone_number": "+14155550123",
  "message": "Reminder: Northwind Dental business license expires on 2026-10-15."
}'

{
  "success": true,
  "data": {
    "phone_number": "+14155550123",
    "country": "US",
    "country_name": "United States",
    "message_length": 68,
    "segments": 1,
    "credits_per_segment": 1,
    "total_credits": 1,
    "has_unicode": false
  }
}