Update Message Template
Update Message Template for SMSGatewayCenter APIs
Introduction to SMSGatewayCenter APIs
Welcome to SMSGatewayCenter’s API documentation hub! This guide helps you update message templates using our powerful Update Message Template API, part of our messaging suite including SMS API for bulk messaging, WhatsApp Business API for customer engagement, Voice Call API for automated alerts, and Two-Way SMS API for interactive communication. Our API supports only POST methods over HTTP, offering a secure way to modify DLT-approved templates. Ideal for developers in India, start integrating with our SMS gateway at unify.smsgateway.center/signup/!
Update your message templates (e.g., with typed DLT variable tags such as {#numeric#}) to reflect changes, ensuring DLT compliance for bulk SMS campaigns. This endpoint enhances your bulk SMS management with real-time updates and Unicode support, perfect for maintaining standardized, compliant messaging.
Mandatory DLT variable tagging
For templates created after 14 January 2026, operator DLT platforms require every variable to declare its data type. Do not register new templates with the legacy generic {#var#} placeholder.
Approved tags:
{#numeric#}for OTPs, amounts, and numbers{#alphanumeric#}for names, reference IDs, and ticket numbers{#url#}for website links{#urlott#}for OTT or app download links{#cbn#}for callback numbers{#email#}for email addresses
Example: Your OTP is {#numeric#}. Track order {#alphanumeric#} at {#url#} or call {#cbn#}. Validate drafts with the free DLT Template Format Validator and confirm match with the Validate DLT Template API before send.
API Endpoint
https://unify.smsgateway.center/SMSApi/template/update
| Key | Value | Description |
|---|---|---|
| Login Credentials (Required) | ||
| Authenticate your API request using userid-password or apiKey—choose one method. | ||
| userid | Your Registered Username | Your registered username; use if apiKey isn't provided. Signup for User ID |
| password | Your Password | URL-encoded password (for special characters); use if apiKey isn't provided. Signup for API Key |
| Header (optional) Parameters | ||
| apiKey | Your unique apiKey | apiKey needs to be sent as HTTP header when you are not using userid-password method. You can avail this from your user control panel and use instead of userid-password HTTP Request parameter. Please do not disclose this to anyone. |
| Required Parameters | ||
| message | Message Template Content. | Updated DLT template body with typed variable tags ({#numeric#}, {#alphanumeric#}, {#url#}, {#urlott#}, {#cbn#}, {#email#}). Re-tagging may require a new DLT Template ID on the operator portal. |
| id | Message Template's ID. | Enter Message Template's ID which needs to be edited. |
| output | plain|json|plain | Value for response format.System default is plain. If you need responses in json or plain then you have to give value as json or plain. |
<?php
$curl = curl_init();
curl_setopt_array($curl, array(
CURLOPT_URL => "https://unify.smsgateway.center/SMSApi/template/update",
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING => "",
CURLOPT_MAXREDIRS => 10,
CURLOPT_TIMEOUT => 30,
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_CUSTOMREQUEST => "POST",
CURLOPT_POSTFIELDS => "userid=YourUsername&password=YourPassword&message=Dear%20%7B%23alphanumeric%23%7D%2C%20your%20OTP%20is%20%7B%23numeric%23%7D.%20Valid%20for%2010%20minutes.%20-%20SMSGAT&id=123&output=json",
CURLOPT_HTTPHEADER => array(
"cache-control: no-cache",
"content-type: application/x-www-form-urlencoded"
),
));
$response = curl_exec($curl);
$err = curl_error($curl);
curl_close($curl);
if ($err) {
echo "cURL Error #:" . $err;
} else {
echo $response;
}
{
"response": {
"api": "template",
"action": "update",
"status": "success",
"msg": "Template updated successfully and given for approval.",
"code": "200"
}
}
