Quickstart: Send an SMS message

Important

SMS capabilities depend on the phone number you use and the country that you're operating within as determined by your Azure billing address. For more information, visit the Subscription eligibility documentation.

Currently, SMS messages can only be sent to received from United States phone numbers. For more information, see Phone number types.

Get started with Azure Communication Services by using the Communication module in Azure CLI to send SMS messages.

Completing this quickstart incurs a small cost of a few USD cents or less in your Azure account.

Prerequisites

Prerequisite check

  • In a terminal or command window, run az --version to check that Azure CLI is installed.

Setting up

Install the communication module

Run the following command in a terminal or command window to install the communication module.

az extension add --name communication

Sign in to Azure CLI

You'll need to sign in to Azure CLI. You can sign in running the az login command from the terminal and providing your credentials.

Make sure you're using the correct subscription

If you have multiple subscriptions in your account, make sure that you're using the correct one for this tutorial.

In a terminal or command windows, run the following command to check the current subscription.

az account show

If you need to change subscription, you can do that by running the following command.

az account set --subscription "<yourSubcriptionId>"

You need to replace <yourSubscriptionId> with your actual subscription ID, which you can find in the Subscriptions section in Azure portal.

(Optional) Use Azure CLI sms operations without passing in a connection string

You can configure the AZURE_COMMUNICATION_CONNECTION_STRING environment variable to use Azure CLI sms operations without having to use --connection_string to pass in the connection string. To configure an environment variable, open a console window and select your operating system from the below tabs. Replace <yourConnectionString> with your actual connection string.

Open a console window and enter the following command:

setx AZURE_COMMUNICATION_CONNECTION_STRING "<yourConnectionString>"

After you add the environment variable, you may need to restart any running programs that will need to read the environment variable, including the console window. For example, if you're using Visual Studio as your editor, restart Visual Studio before running the example.

Operations

Send a 1:1 SMS message

To send an SMS message to a list of recipients, call the send method from the sms module with a single recipient phone number.

az communication sms send --sender "<fromPhoneNumber>" --recipient "<toPhoneNumber>" --message "Hello world via SMS for Azure CLI!" --connection-string "<yourConnectionString>"

Make these replacements in the code:

  • Replace <fromPhoneNumber> with an SMS-enabled phone number that's associated with your Communication Services resource.
  • Replace <toPhoneNumber> with a phone number that you'd like to send a message to.
  • Replace <yourConnectionString> with your connection string.

Warning

Provide phone numbers in E.164 international standard format, for example, +14255550123. The value for <fromPhoneNumber> can also be a short code, for example, 23456.

Send a 1:N SMS message

To send an SMS message to a single recipient, call the send method from the sms module with multiple recipient phone numbers.

az communication sms send --sender "<fromPhoneNumber>" --recipient "<toPhoneNumber1>" "<toPhoneNumber2>" "<toPhoneNumber3>" --message "Hello world via SMS for Azure CLI!" --connection-string "<yourConnectionString>"

Make these replacements in the code:

  • Replace <fromPhoneNumber> with an SMS-enabled phone number that's associated with your Communication Services resource.
  • Replace <toPhoneNumberN> with the N'th phone number that you'd like to send a message to.
  • Replace <yourConnectionString> with your connection string.

Warning

Provide phone numbers in E.164 international standard format, for example, +14255550123. The value for <fromPhoneNumber> can also be a short code, for example, 23456.

Get started with Azure Communication Services by using the Communication Services C# SMS SDK to send SMS messages.

Completing this quickstart incurs a small cost of a few USD cents or less in your Azure account.

Note

Find the finalized code for this quickstart on GitHub.

Prerequisites

Prerequisite check

  • In a terminal or command window, run the dotnet command to check that the .NET SDK is installed.
  • To view the phone numbers that are associated with your Communication Services resource, sign in to the Azure portal and locate your Communication Services resource. In the navigation pane on the left, select Phone numbers.

Set up the application environment

To set up an environment for sending messages, take the steps in the following sections.

Create a new C# application

  1. In a console window, such as cmd, PowerShell, or Bash, use the dotnet new command to create a new console app with the name SmsQuickstart. This command creates a simple "Hello World" C# project with a single source file, Program.cs.

    dotnet new console -o SmsQuickstart
    
  2. Change your directory to the newly created app folder and use the dotnet build command to compile your application.

    cd SmsQuickstart
    dotnet build
    

Install the package

  1. While still in the application directory, install the Azure Communication Services SMS SDK for .NET package by using the following command.

    dotnet add package Azure.Communication.Sms --version 1.0.0
    
  2. Add a using directive to the top of Program.cs to include the Azure.Communication namespace.

    
    using System;
    using System.Collections.Generic;
    
    using Azure;
    using Azure.Communication;
    using Azure.Communication.Sms;
    
    

Object model

The following classes and interfaces handle some of the major features of the Azure Communication Services SMS SDK for C#.

Name Description
SmsClient This class is needed for all SMS functionality. You instantiate it with your subscription information, and use it to send SMS messages.
SmsSendOptions This class provides options for configuring delivery reporting. If enable_delivery_report is set to True, an event is emitted when delivery is successful.
SmsSendResult This class contains the result from the SMS service.

Authenticate the client

Open Program.cs in a text editor and replace the body of the Main method with code to initialize an SmsClient with your connection string. The following code retrieves the connection string for the resource from an environment variable named COMMUNICATION_SERVICES_CONNECTION_STRING. Learn how to manage your resource's connection string.

// This code retrieves your connection string
// from an environment variable.
string connectionString = Environment.GetEnvironmentVariable("COMMUNICATION_SERVICES_CONNECTION_STRING");

SmsClient smsClient = new SmsClient(connectionString);

Send a 1:1 SMS message

To send an SMS message to a single recipient, call the Send or SendAsync function from the SmsClient. Add this code to the end of the Main method in Program.cs:

SmsSendResult sendResult = smsClient.Send(
    from: "<from-phone-number>",
    to: "<to-phone-number>",
    message: "Hello World via SMS"
);

Console.WriteLine($"Sms id: {sendResult.MessageId}");

Make these replacements in the code:

  • Replace <from-phone-number> with an SMS-enabled phone number that's associated with your Communication Services resource.
  • Replace <to-phone-number> with the phone number that you'd like to send a message to.

Warning

Provide phone numbers in E.164 international standard format, for example, +14255550123. The value for <from-phone-number> can also be a short code, for example, 23456.

Send a 1:N SMS message with options

To send an SMS message to a list of recipients, call the Send or SendAsync function from the SmsClient with a list of recipient phone numbers. You can also provide optional parameters to specify whether the delivery report should be enabled and to set custom tags.

Response<IReadOnlyList<SmsSendResult>> response = smsClient.Send(
    from: "<from-phone-number>",
    to: new string[] { "<to-phone-number-1>", "<to-phone-number-2>" },
    message: "Weekly Promotion!",
    options: new SmsSendOptions(enableDeliveryReport: true) // OPTIONAL
    {
        Tag = "marketing", // custom tags
    });

IEnumerable<SmsSendResult> results = response.Value;
foreach (SmsSendResult result in results)
{
    Console.WriteLine($"Sms id: {result.MessageId}");
    Console.WriteLine($"Send Result Successful: {result.Successful}");
}

Make these replacements in the code:

  • Replace <from-phone-number> with an SMS-enabled phone number that's associated with your Communication Services resource.
  • Replace <to-phone-number-1> and <to-phone-number-2> with phone numbers that you'd like to send a message to.

Warning

Provide phone numbers in E.164 international standard format, for example, +14255550123. The value for <from-phone-number> can also be a short code, for example, 23456.

The enableDeliveryReport parameter is an optional parameter that you can use to configure delivery reporting. This functionality is useful when you want to emit events when SMS messages are delivered. See the Handle SMS Events quickstart to configure delivery reporting for your SMS messages.

You can use the Tag parameter to apply a tag to the delivery report.

Run the code

Run the application from your application directory with the dotnet run command.

dotnet run

Sample code

You can download the sample app from GitHub.

Get started with Azure Communication Services by using the Communication Services JavaScript SMS SDK to send SMS messages.

Completing this quickstart incurs a small cost of a few USD cents or less in your Azure account.

Note

Find the finalized code for this quickstart on GitHub.

Prerequisites

Prerequisite check

  • In a terminal or command window, run node --version to check that Node.js is installed.
  • To view the phone numbers that are associated with your Communication Services resource, sign in to the Azure portal and locate your Communication Services resource. In the navigation pane on the left, select Phone numbers.

Set up the application environment

To set up an environment for sending messages, take the steps in the following sections.

Create a new Node.js application

  1. Open your terminal or command window, and then run the following command to create a new directory for your app and navigate to it.

    mkdir sms-quickstart && cd sms-quickstart
    
  2. Run the following command to create a package.json file with default settings.

    npm init -y
    
  3. Use a text editor to create a file called send-sms.js in the project root directory.

In the following sections, you'll add all the source code for this quickstart to the send-sms.js file that you just created.

Install the package

Use the npm install command to install the Azure Communication Services SMS SDK for JavaScript.

npm install @azure/communication-sms --save

The --save option lists the library as a dependency in your package.json file.

Object model

The following classes and interfaces handle some of the major features of the Azure Communication Services SMS SDK for Node.js.

Name Description
SmsClient This class is needed for all SMS functionality. You instantiate it with your subscription information, and use it to send SMS messages.
SmsSendRequest This interface is the model for building the SMS request. You use it to configure the to and from phone numbers and the SMS content.
SmsSendOptions This interface provides options for configuring delivery reporting. If enableDeliveryReport is set to true, an event is emitted when delivery is successful.
SmsSendResult This class contains the result from the SMS service.

Authenticate the client

To authenticate a client, you import the SmsClient from the SDK and instantiate it with your connection string. You can retrieve the connection string for the resource from an environment variable. For instance, the code in this section retrieves the connection string from the COMMUNICATION_SERVICES_CONNECTION_STRING environment variable. Learn how to manage your resource's connection string.

To import the client and instantiate it:

  1. Create a file named send-sms.js.

  2. Add the following code to send-sms.js.

const { SmsClient } = require('@azure/communication-sms');

// This code retrieves your connection string
// from an environment variable.
const connectionString = process.env['COMMUNICATION_SERVICES_CONNECTION_STRING'];

// Instantiate the SMS client.
const smsClient = new SmsClient(connectionString);

Send a 1:N SMS message

To send an SMS message to a list of recipients, call the send function from the SmsClient with a list of recipient phone numbers. If you'd like to send a message to a single recipient, include only one number in the list. Add this code to the end of send-sms.js:

async function main() {
  const sendResults = await smsClient.send({
    from: "<from-phone-number>",
    to: ["<to-phone-number-1>", "<to-phone-number-2>"],
    message: "Hello World 👋🏻 via SMS"
  });

  // Individual messages can encounter errors during sending.
  // Use the "successful" property to verify the status.
  for (const sendResult of sendResults) {
    if (sendResult.successful) {
      console.log("Success: ", sendResult);
    } else {
      console.error("Something went wrong when trying to send this message: ", sendResult);
    }
  }
}

main();

Make these replacements in the code:

  • Replace <from-phone-number> with an SMS-enabled phone number that's associated with your Communication Services resource.
  • Replace <to-phone-number-1> and <to-phone-number-2> with the phone numbers that you'd like to send a message to.

Warning

Provide phone numbers in E.164 international standard format, for example, +14255550123. The value for <from-phone-number> can also be a short code, for example, 23456.

Send a 1:N SMS message with options

You can also provide an options object to specify whether the delivery report should be enabled and to set custom tags.


async function main() {
  const sendResults = await smsClient.send({
    from: "<from-phone-number>",
    to: ["<to-phone-number-1>", "<to-phone-number-2>"],
    message: "Weekly Promotion!"
  }, {
    // Optional parameters
    enableDeliveryReport: true,
    tag: "marketing"
  });

  // Individual messages can encounter errors during sending.
  // Use the "successful" property to verify the status.
  for (const sendResult of sendResults) {
    if (sendResult.successful) {
      console.log("Success: ", sendResult);
    } else {
      console.error("Something went wrong when trying to send this message: ", sendResult);
    }
  }
}

main();

Make these replacements in the code:

  • Replace <from-phone-number> with an SMS-enabled phone number that's associated with your Communication Services resource.
  • Replace <to-phone-number-1> and <to-phone-number-2> with phone numbers that you'd like to send a message to.

Warning

Provide phone numbers in E.164 international standard format, for example, +14255550123. The value for <from-phone-number> can also be a short code, for example, 23456.

The enableDeliveryReport parameter is an optional parameter that you can use to configure delivery reporting. This functionality is useful when you want to emit events when SMS messages are delivered. See the Handle SMS Events quickstart to configure delivery reporting for your SMS messages. The tag parameter is optional. You can use it to apply a tag to the delivery report.

Run the code

Use the node command to run the code that you added to the send-sms.js file.


node ./send-sms.js

Get started with Azure Communication Services by using the Communication Services Python SMS SDK to send SMS messages.

Completing this quickstart incurs a small cost of a few USD cents or less in your Azure account.

Note

Find the finalized code for this quickstart on GitHub.

Prerequisites

Prerequisite check

  • In a terminal or command window, run the python --version command to check that Python is installed.
  • To view the phone numbers that are associated with your Communication Services resource, sign in to the Azure portal and locate your Communication Services resource. In the navigation pane on the left, select Phone numbers.

Set up the application environment

To set up an environment for sending messages, take the steps in the following sections.

Create a new Python application

  1. Open your terminal or command window. Then use the following command to create a new directory for your app and navigate to it.

    mkdir sms-quickstart && cd sms-quickstart
    
  2. Use a text editor to create a file called send-sms.py in the project root directory and add the structure for the program, including basic exception handling.

    import os
    from azure.communication.sms import SmsClient
    
    try:
        # Quickstart code goes here.
    except Exception as ex:
        print('Exception:')
        print(ex)
    

In the following sections, you'll add all the source code for this quickstart to the send-sms.py file that you just created.

Install the package

While still in the application directory, install the Azure Communication Services SMS SDK for Python package by using the following command.

pip install azure-communication-sms

Object model

The following classes and interfaces handle some of the major features of the Azure Communication Services SMS SDK for Python.

Name Description
SmsClient This class is needed for all SMS functionality. You instantiate it with your subscription information, and use it to send SMS messages.
SmsSendResult This class contains the result from the SMS service.

Authenticate the client

Instantiate an SmsClient with your connection string. Learn how to manage your resource's connection string.

# Create the SmsClient object that you use to send SMS messages.
sms_client = SmsClient.from_connection_string(<connection_string>)

For simplicity, this quickstart uses connection strings, but in production environments, we recommend using service principals.

Send a 1:1 SMS message

To send an SMS message to a single recipient, call the send method from the SmsClient with a single recipient phone number. You can also provide optional parameters to specify whether the delivery report should be enabled and to set custom tags. Add this code to the end of the try block in send-sms.py:


# Call send() with SMS values.
sms_responses = sms_client.send(
    from_="<from-phone-number>",
    to="<to-phone-number>",
    message="Hello World via SMS",
    enable_delivery_report=True, # optional property
    tag="custom-tag") # optional property

Make these replacements in the code:

  • Replace <from-phone-number> with an SMS-enabled phone number that's associated with your communication service.
  • Replace <to-phone-number> with the phone number that you'd like to send a message to.

Warning

Provide phone numbers in E.164 international standard format, for example, +14255550123. The value for <from-phone-number> can also be a short code, for example, 23456.

Send a 1:N SMS message

To send an SMS message to a list of recipients, call the send method from the SmsClient with a list of recipient phone numbers. You can also provide optional parameters to specify whether the delivery report should be enabled and to set custom tags. Add this code to the end of the try block in send-sms.py:


# Call send() with SMS values.
sms_responses = sms_client.send(
    from_="<from-phone-number>",
    to=["<to-phone-number-1>", "<to-phone-number-2>"],
    message="Hello World via SMS",
    enable_delivery_report=True, # optional property
    tag="custom-tag") # optional property

Make these replacements in the code:

  • Replace <from-phone-number> with an SMS-enabled phone number that's associated with your communication service.
  • Replace <to-phone-number-1> and <to-phone-number-2> with phone numbers that you'd like to send a message to.

Warning

Provide phone numbers in E.164 international standard format, for example, +14255550123. The value for <from-phone-number> can also be a short code, for example, 23456.

Optional parameters

The enable_delivery_report parameter is an optional parameter that you can use to configure delivery reporting. This functionality is useful when you want to emit events when SMS messages are delivered. See the Handle SMS Events quickstart to configure delivery reporting for your SMS messages.

The tag parameter is an optional parameter that you can use to apply a tag to the delivery report.

Run the code

Run the application from your application directory with the python command.

python send-sms.py

The complete Python script should look something like the following code:


import os
from azure.communication.sms import SmsClient

try:
    # Create the SmsClient object that you use to send SMS messages.
    sms_client = SmsClient.from_connection_string("<connection string>")
    # Call send() with SMS values.
    sms_responses = sms_client.send(
       from_="<from-phone-number>",
       to="<to-phone-number>",
       message="Hello World via SMS",
       enable_delivery_report=True, # optional property
       tag="custom-tag") # optional property

except Exception as ex:
    print('Exception:')
    print(ex)

Get started with Azure Communication Services by using the Communication Services Java SMS SDK to send SMS messages.

Completing this quickstart incurs a small cost of a few USD cents or less in your Azure account.

Note

Find the finalized code for this quickstart on GitHub.

Prerequisites

Prerequisite check

  • In a terminal or command window, run mvn -v to check that Maven is installed.
  • To view the phone numbers that are associated with your Communication Services resource, sign in to the Azure portal and locate your Communication Services resource. In the navigation pane on the left, select Phone numbers.

Set up the application environment

To set up an environment for sending messages, take the steps in the following sections.

Create a new Java application

Open your terminal or command window and navigate to the directory where you would like to create your Java application. Run the following command to generate the Java project from the maven-archetype-quickstart template.

mvn archetype:generate -DgroupId=com.communication.quickstart -DartifactId=communication-quickstart -DarchetypeArtifactId=maven-archetype-quickstart -DarchetypeVersion=1.4 -DinteractiveMode=false

The generate goal creates a directory with the same name as the artifactId value. Under this directory, the src/main/java directory contains the project source code, the src/test/java directory contains the test source, and the pom.xml file is the project's Project Object Model (POM).

Install the package

Open the pom.xml file in your text editor. Add the following dependency element to the group of dependencies.

<dependency>
    <groupId>com.azure</groupId>
    <artifactId>azure-communication-sms</artifactId>
    <version>1.0.1</version>
</dependency>

Set up the app framework

Open /src/main/java/com/communication/quickstart/App.java in a text editor, add import directives, and remove the System.out.println("Hello world!"); statement:

package com.communication.quickstart;

import com.azure.communication.sms.models.*;
import com.azure.core.credential.AzureKeyCredential;
import com.azure.communication.sms.*;
import com.azure.core.util.Context;
import java.util.Arrays;

public class App
{
    public static void main( String[] args )
    {
        // Quickstart code goes here.
    }
}

Object model

The following classes and interfaces handle some of the major features of the Azure Communication Services SMS SDK for Java.

Name Description
SmsClientBuilder This class creates the SmsClient. You provide it with an endpoint, a credential, and an HTTP client.
SmsClient This class is needed for all SMS functionality. You use it to send SMS messages.
SmsSendOptions This class provides options to add custom tags and configure delivery reporting. If deliveryReportEnabled is set to true, an event is emitted when delivery is successful.
SmsSendResult This class contains the result from the SMS service.

Authenticate the client

To authenticate a client, you instantiate an SmsClient with your connection string. For the credential, use the Key from the Azure portal. Learn how to manage your resource's connection string. You can also initialize the client with any custom HTTP client that implements the com.azure.core.http.HttpClient interface.

To instantiate a client, add the following code to the main method:

// You can get your endpoint and access key from your resource in the Azure portal.
String endpoint = "https://<resource-name>.communication.azure.com/";
AzureKeyCredential azureKeyCredential = new AzureKeyCredential("<access-key-credential>");

SmsClient smsClient = new SmsClientBuilder()
                .endpoint(endpoint)
                .credential(azureKeyCredential)
                .buildClient();

You can also provide the entire connection string by using the connectionString function instead of providing the endpoint and access key.

// You can get your connection string from your resource in the Azure portal.
String connectionString = "endpoint=https://<resource-name>.communication.azure.com/;accesskey=<access-key>";

SmsClient smsClient = new SmsClientBuilder()
            .connectionString(connectionString)
            .buildClient();

Send a 1:1 SMS message

To send an SMS message to a single recipient, call the send method from the SmsClient with a single recipient phone number. You can also provide optional parameters to specify whether the delivery report should be enabled and to set custom tags.

SmsSendResult sendResult = smsClient.send(
                "<from-phone-number>",
                "<to-phone-number>",
                "Weekly Promotion");

System.out.println("Message Id: " + sendResult.getMessageId());
System.out.println("Recipient Number: " + sendResult.getTo());
System.out.println("Send Result Successful:" + sendResult.isSuccessful());

Make these replacements in the code:

  • Replace <from-phone-number> with an SMS-enabled phone number that's associated with your Communication Services resource.
  • Replace <to-phone-number> with a phone number that you'd like to send a message to.

Warning

Provide phone numbers in E.164 international standard format, for example, +14255550123. The value for <from-phone-number> can also be a short code, for example, 23456.

Send a 1:N SMS message with options

To send an SMS message to a list of recipients, call the send method with a list of recipient phone numbers. You can also provide optional parameters to specify whether the delivery report should be enabled and to set custom tags.

SmsSendOptions options = new SmsSendOptions();
options.setDeliveryReportEnabled(true);
options.setTag("Marketing");

Iterable<SmsSendResult> sendResults = smsClient.sendWithResponse(
    "<from-phone-number>",
    Arrays.asList("<to-phone-number1>", "<to-phone-number2>"),
    "Weekly Promotion",
    options /* Optional */,
    Context.NONE).getValue();

for (SmsSendResult result : sendResults) {
    System.out.println("Message Id: " + result.getMessageId());
    System.out.println("Recipient Number: " + result.getTo());
    System.out.println("Send Result Successful:" + result.isSuccessful());
}

Make these replacements in the code:

  • Replace <from-phone-number> with an SMS-enabled phone number that's associated with your Communication Services resource
  • Replace <to-phone-number-1> and <to-phone-number-2> with phone numbers that you'd like to send a message to.

Warning

Provide phone numbers in E.164 international standard format, for example, +14255550123. The value for <from-phone-number> can also be a short code, for example, 23456.

The setDeliveryReportEnabled method is used to configure delivery reporting. This functionality is useful when you want to emit events when SMS messages are delivered. See the Handle SMS Events quickstart to configure delivery reporting for your SMS messages.

You can use the setTag method to apply a tag to the delivery report.

Run the code

  1. Navigate to the directory that contains the pom.xml file and compile the project by using the mvn command.

    
    mvn compile
    
    
  2. Build the package.

    
    mvn package
    
    
  3. Run the following mvn command to execute the app.

    
    mvn exec:java -Dexec.mainClass="com.communication.quickstart.App" -Dexec.cleanupDaemonThreads=false
    
    

Troubleshooting

To troubleshoot issues related to SMS delivery, you can enable delivery reporting with Event Grid to capture delivery details.

Clean up resources

If you want to clean up and remove a Communication Services subscription, you can delete the resource or resource group. Deleting the resource group also deletes any other resources associated with it. Learn more about cleaning up resources.

Toll-free verification

If you have a new toll-free number and want to send high volume of SMS messages or send SMS messages to Canadian phone numbers, please visit here to learn how to verify your toll-free number.

Next steps

In this quickstart, you learned how to send SMS messages by using Communication Services.