SMS API

Vonage's SMS API enables you to send and receive text messages to and from users worldwide, using our REST APIs.

Programmatically send and receive high volumes of SMS globally.
Send SMS with low latency and high delivery rates.
Receive SMS using local numbers.
Scale your applications with familiar web technologies.
Pay only for what you use, nothing more.
Auto-redact feature to protect privacy.

This topic contains the following information:

Getting Started - Information on how to get started quickly
Troubleshooting - Message object status field and error code information
Concepts - Introductory concepts
Guides - Learn how to use the SMS API
Code Snippets - Code snippets to help with specific tasks
Use Cases - Use cases with code examples
Reference - REST API documentation

Getting Started

Important 10 DLC guidelines for US customers

10 DLC stands for 10 Digit Long Code. Major US carriers have announced their requirements for a new standard for application-to-person (A2P) messaging in the USA, which applies to all messaging over 10 digit geographic phone numbers, also know as 10 DLC. This new standard provides many benefits including supporting higher messaging speeds and better deliverability.

Customers using the Vonage SMS API to send traffic from a +1 Country Code 10 Digit Long Code into US networks will need to register a brand and campaign in order to get approval for sending messages.

Note: US numbers can no longer be shared across brands which include both geographic numbers and US Shared Short Codes.

Vonage customers using US shared short codes: T-Mobile and AT&T’s new code of conduct prohibits the use of shared originators, therefore, Shared Short codes will no longer be an acceptable format for A2P messaging.

Vonage customers using a Shared Short Code must migrate SMS traffic to either a 10 DLC, Toll Free SMS Number, or Dedicated Short Code.
Vonage customers using our Shared Short Code API must migrate to either our SMS API or Verify API.
Customers using Dedicated Short Codes are not affected by these changes within the scope of 10 DLC.

To learn more about 10 DLC including important dates and carrier-specific information, see the knowledge base.

If you have decided moving to 10 DLC is right for your campaigns, you must: 1. Register your brand 2. Register a campaign (coming soon) 3. Link a number (coming soon)

Register a brand

Navigate to Vonage API dashboard > SMS > Brands and campaigns.
Click Register a new brand.
Fill in all required fields on the Register a new brand form.
Click Review details. A confirmation dialog box opens.
Review your brand details.
Click Register and pay.

Note: You will not be able to change your brand details after registering. Your brand information is displayed in the Brand list on the Brands and campaigns page where you can monitor the status of its registration and view more details.

Send an SMS

This example shows you how to send an SMS to your chosen number.

First, sign up for a Vonage account if you don't already have one, and make a note of your API key and secret on the dashboard getting started page.

Replace the following placeholder values in the sample code:

Key	Description
`VONAGE_API_KEY`	Your Vonage API key.
`VONAGE_API_SECRET`	Your Vonage API secret.

Write the code

Add the following to send-sms.sh:

curl -X "POST" "https://rest.nexmo.com/sms/json" \
  -d "from=$VONAGE_BRAND_NAME" \
  -d "text=A text message sent using the Vonage SMS API" \
  -d "to=$TO_NUMBER" \
  -d "api_key=$VONAGE_API_KEY" \
  -d "api_secret=$VONAGE_API_SECRET"

View full source

Run your code

Save this file to your machine and run it:

sh send-sms.sh

Prerequisites

npm install @vonage/server-sdk

Create a file named send.js and add the following code:

const Vonage = require('@vonage/server-sdk')

const vonage = new Vonage({
  apiKey: VONAGE_API_KEY,
  apiSecret: VONAGE_API_SECRET
})

View full source

Write the code

Add the following to send.js:

const from = VONAGE_BRAND_NAME
const to = TO_NUMBER
const text = 'A text message sent using the Vonage SMS API'

vonage.message.sendSms(from, to, text, (err, responseData) => {
    if (err) {
        console.log(err);
    } else {
        if(responseData.messages[0]['status'] === "0") {
            console.log("Message sent successfully.");
        } else {
            console.log(`Message failed with error: ${responseData.messages[0]['error-text']}`);
        }
    }
})

View full source

Run your code

Save this file to your machine and run it:

node send.js

Prerequisites

Add the following to `build.gradle`:

compile 'com.vonage:client:5.5.0'

Create a class named SendMessage and add the following code to the main method:

VonageClient client = VonageClient.builder().apiKey(VONAGE_API_KEY).apiSecret(VONAGE_API_SECRET).build();

View full source

Write the code

Add the following to the main method of the SendMessage class:

TextMessage message = new TextMessage(VONAGE_BRAND_NAME,
        TO_NUMBER,
        "A text message sent using the Vonage SMS API"
);

SmsSubmissionResponse response = client.getSmsClient().submitMessage(message);

if (response.getMessages().get(0).getStatus() == MessageStatus.OK) {
    System.out.println("Message sent successfully.");
} else {
    System.out.println("Message failed with error: " + response.getMessages().get(0).getErrorText());
}

View full source

Run your code

We can use the application plugin for Gradle to simplify the running of our application. Update your build.gradle with the following:

  apply plugin: 'application'
  mainClassName = project.hasProperty('main') ? project.getProperty('main') : ''

Run the following gradle command to execute your application, replacing com.vonage.quickstart.sms with the package containing SendMessage:

gradle run -Pmain=com.vonage.quickstart.sms.SendMessage

Prerequisites

Install-Package Vonage

Create a file named SendSms.cs and add the following code:

using Vonage;
using Vonage.Request;

View full source

Add the following to SendSms.cs:

var credentials = Credentials.FromApiKeyAndSecret(
    VONAGE_API_KEY,
    VONAGE_API_SECRET
    );

var VonageClient = new VonageClient(credentials);

View full source

Write the code

Add the following to SendSms.cs:

var response = VonageClient.SmsClient.SendAnSms(new Vonage.Messaging.SendSmsRequest()
{
    To = TO_NUMBER,
    From = VONAGE_BRAND_NAME,
    Text = "A text message sent using the Vonage SMS API"
});

View full source

Prerequisites

composer require vonage/client

Create a file named send-sms.php and add the following code:

$basic  = new \Vonage\Client\Credentials\Basic(VONAGE_API_KEY, VONAGE_API_SECRET);
$client = new \Vonage\Client($basic);

View full source

Write the code

Add the following to send-sms.php:

$response = $client->sms()->send(
    new \Vonage\SMS\Message\SMS(TO_NUMBER, BRAND_NAME, 'A text message sent using the Nexmo SMS API')
);

$message = $response->current();

if ($message->getStatus() == 0) {
    echo "The message was sent successfully\n";
} else {
    echo "The message failed with status: " . $message->getStatus() . "\n";
}

View full source

Run your code

Save this file to your machine and run it:

php send-sms.php

Prerequisites

pip install vonage

Create a file named send-an-sms.py and add the following code:

client = vonage.Client(key=VONAGE_API_KEY, secret=VONAGE_API_SECRET)
sms = vonage.Sms(client)

View full source

Write the code

Add the following to send-an-sms.py:

responseData = sms.send_message(
    {
        "from": VONAGE_BRAND_NAME,
        "to": TO_NUMBER,
        "text": "A text message sent using the Nexmo SMS API",
    }
)

if responseData["messages"][0]["status"] == "0":
    print("Message sent successfully.")
else:
    print(f"Message failed with error: {responseData['messages'][0]['error-text']}")

View full source

Run your code

Save this file to your machine and run it:

python send-an-sms.py

Prerequisites

gem install vonage

Create a file named send.rb and add the following code:

client = Vonage::Client.new(
  api_key: VONAGE_API_KEY,
  api_secret: VONAGE_API_SECRET
)

View full source

Write the code

Add the following to send.rb:

client.sms.send(
  from: VONAGE_BRAND_NAME,
  to: TO_NUMBER,
  text: 'A text message sent using the Vonage SMS API'
)

View full source

Run your code

Save this file to your machine and run it:

ruby send.rb

Troubleshooting

If you have problems when making API calls be sure to check the returned status field for specific error codes.

Concepts

Before using the Vonage SMS API, familiarize yourself with the following:

Number format - The SMS API requires phone numbers in E.164 format.
Authentication - The SMS API authenticates using your account API key and secret.
Webhooks - The SMS API makes HTTP requests to your application web server so that you can act upon them. For example: inbound SMS and delivery receipts.

Guides

Sender identity: How to change where your SMS appears to come from.
Concatenation and encoding: Determining whether the byte length of a message results in it being sent as multiple SMS.
Country specific features: How different countries' SMS sending rules can affect your campaign.
Delivery receipts: How to request a delivery receipt (DLR) from the carrier.
Inbound SMS: How to receive SMS on your Vonage virtual numbers.
Troubleshooting: What to do if your SMS delivery fails.
SMPP access: Using SMPP instead of REST to access the SMS API.

Code Snippets

Use Cases

Reference

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SMS API

Contents

Getting Started

Important 10 DLC guidelines for US customers

Register a brand

Send an SMS

Write the code

Run your code

Prerequisites

Write the code

Run your code

Prerequisites

Write the code

Run your code

Prerequisites

Write the code

Prerequisites

Write the code

Run your code

Prerequisites

Write the code

Run your code

Prerequisites

Write the code

Run your code

Troubleshooting

Concepts

Guides

Code Snippets

Use Cases

Reference