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POST
/
{locale}
/
sms
/
send
curl -X POST "https://api.loyalty.lt/lt/sms/send" \
  -H "Content-Type: application/json" \
  -H "X-API-Key: your_api_key" \
  -H "X-API-Secret: your_api_secret" \
  -d '{
    "source": "MyBrand",
    "destination": "+37061234567",
    "message": "Sveiki! Jūsų užsakymas #12345 išsiųstas."
  }'

{
  "success": true,
  "message": "SMS sent successfully",
  "data": {
    "message_id": "msg_abc123def456",
    "source": "MyBrand",
    "destination": "+37061234567",
    "status": "queued",
    "parts": 1,
    "cost": {
      "amount": 0.0556,
      "currency": "EUR",
      "parts_charged": 1
    },
    "scheduled": null,
    "validity": "2025-01-16T10:30:00Z",
    "marketing_consent_registered": false
  },
  "code": 200
}

Documentation Index

Fetch the complete documentation index at: https://docs.loyalty.lt/llms.txt

Use this file to discover all available pages before exploring further.

​
Send SMS

Send an SMS message to a mobile phone number. Messages are queued and processed asynchronously with delivery status tracking.
This endpoint requires an approved sender name. See SMS Overview for setup instructions.

​
Path Parameters

​
locale
string
required
Language code (e.g., lt, en)

​
Authentication

​
X-API-Key
string
required
API key from Partners Portal
​
X-API-Secret
string
required
API secret from Partners Portal

​
Request Body

​
Required Fields

​
source
string
required
Origin sender name (alphatag). Must be pre-approved in Partners Portal.Requirements:
  • Alphanumeric only (letters, numbers, spaces)
  • Maximum 11 characters
  • Must be approved for your account
Example: "Loyalty", "MyBrand"
​
destination
string
required
Target mobile number in E.164 format (with country code).Example: "+37061234567", "37061234567"
​
message
string
required
Message text to send. Maximum 1600 characters.
Long messages are split into multiple parts and billed accordingly.

​
Optional Fields

​
receipt
boolean
default:"false"
Request delivery receipt. If true, status updates will be sent to receiptURL.
​
receiptURL
string
Callback URL for delivery receipt webhook. Required when receipt: true.
There is no default webhook URL. You must provide receiptURL with every request to receive delivery updates.
Example: "https://your-site.com/sms-webhook"
​
scheduled
string
Schedule message for future delivery. ISO 8601 format.Example: "2025-01-15T10:30:00Z"
​
validity
string
Message expiry time. If not delivered by this time, message is discarded. ISO 8601 format.Example: "2025-01-15T23:59:59Z"
​
validityMinutes
integer
Alternative to validity. Number of minutes until message expires.Range: 1-10080 (7 days max)Example: 1440 (24 hours)
​
marketing_consent
boolean
If true, registers that the recipient has consented to receive marketing messages from you.
​
client_ip
string
The actual IP address of the end user/client who gave consent. Required for GDPR compliance.Example: "192.168.1.100"
​
client_user_agent
string
Browser/device user agent string of the person who gave consent.Example: "Mozilla/5.0 (Windows NT 10.0; Win64; x64)..."
​
consent_page_url
string
URL of the page where consent was obtained.Example: "https://example.com/subscribe"

​
Response

​
success
boolean
Whether the message was queued successfully
​
message
string
Status message
​
data
object
curl -X POST "https://api.loyalty.lt/lt/sms/send" \
  -H "Content-Type: application/json" \
  -H "X-API-Key: your_api_key" \
  -H "X-API-Secret: your_api_secret" \
  -d '{
    "source": "MyBrand",
    "destination": "+37061234567",
    "message": "Sveiki! Jūsų užsakymas #12345 išsiųstas."
  }'

{
  "success": true,
  "message": "SMS sent successfully",
  "data": {
    "message_id": "msg_abc123def456",
    "source": "MyBrand",
    "destination": "+37061234567",
    "status": "queued",
    "parts": 1,
    "cost": {
      "amount": 0.0556,
      "currency": "EUR",
      "parts_charged": 1
    },
    "scheduled": null,
    "validity": "2025-01-16T10:30:00Z",
    "marketing_consent_registered": false
  },
  "code": 200
}

​
Message Parts Calculation

Messages are split based on character encoding:

​
GSM-7 (Standard Latin Characters)

Characters: A-Z, a-z, 0-9, space, and: @£$¥èéùìòÇØøÅåΔ_ΦΓΛΩΠΨΣΘΞ^{}\\[~]|€ÆæßÉ!"#¤%&'()*+,-./:;<=>?¡ÄÖÑܧ¿äöñüà
Message LengthParts
1-160 chars1 part
161-306 chars2 parts
307-459 chars3 parts

​
Unicode (Non-Latin Characters, Emoji)

Message LengthParts
1-70 chars1 part
71-134 chars2 parts
135-201 chars3 parts
To minimize costs, keep messages short and use GSM-7 compatible characters when possible.

Check Status

Get delivery status of sent message

Register Consent

Register marketing consent separately