Quickstart | QuantumTec API reference

Before you begin

Get an API key from the Customer Portal or your account manager.
Replace YOUR_API_KEY with your key, INFO with your Sender ID, and the example phone number with your recipient's number, including the country code.

Check your balance

The response lists balances by currency. amount is the balance; currency is its currency code.

curl --get 'https://api.quantumtec.eu/v1/Common/balance' \
  --header 'Accept: application/json' \
  --data-urlencode 'X-ApiKey=YOUR_API_KEY'

[
  {
    "amount": 392.5,
    "currency": "EUR"
  }
]

Send an SMS

Send the request with your values. Save messageId from your response: you will use it to check delivery.

curl --request POST 'https://api.quantumtec.eu/v1/sms/single' \
  --header 'X-ApiKey: YOUR_API_KEY' \
  --header 'Content-Type: application/json' \
  --header 'Accept: application/json' \
  --data '{
  "to": "37250000000",
  "from": "INFO",
  "text": "Test message"
}'

{
  "messageId": "19905880-9404-4686-a8af-54af8888b96d",
  "sent": "2026-09-01T10:00:01.000Z",
  "partIds": [
    "300000005"
  ]
}

Check delivery

Replace messageId below with the ID from your own send response. The delivery report returns a state for each SMS part.

curl --request POST 'https://api.quantumtec.eu/v1/sms/report' \
  --header 'X-ApiKey: YOUR_API_KEY' \
  --header 'Content-Type: application/json' \
  --header 'Accept: application/json' \
  --data '{
  "messageId": "19905880-9404-4686-a8af-54af8888b96d"
}'

[
  {
    "messageId": "19905880-9404-4686-a8af-54af8888b96d",
    "to": 37250000000,
    "partId": "300000005",
    "state": 2,
    "delivered": "2026-09-01T10:00:02.000Z",
    "errorCode": "000"
  }
]