Calculate SMS credits for a number and message

posthttps://api.expiryedge.com/v1/calculateSMSCost

Public - no API key60/min

Request

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."
}'

Response

{
  "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
  }
}

Resolves the destination country tier from phone_number and counts segments in message (160 GSM / 70 Unicode chars). Only POST is accepted.

Body parameters

application/json

phone_numberstringrequired
E.164 phone number.
messagestring
Message text. Defaults to an empty string.

Returns

200

Credit calculation.

successboolean
dataobject

Errors

`400`	The request is missing required fields or contains invalid values.
`405`	The endpoint does not accept this HTTP method.
`429`	Too many requests for this endpoint from your IP. Wait `Retry-After` seconds.
`500`	Unexpected server error. Retry later; quote `requestId` to support.