Voice Notifications

Overview

This guide shows how to send audio notifications using voice calls. You can play recorded audio when the call recipient answers or use text-to-speech, as we show here, combining static text with dynamic information that Plivo gets from a variable.You can use voice notification for use cases such as:

Order notification
Booking status
Delivery status
Flight cancellation/rescheduling
Two-factor authentication/one-time password
New offer notification
Account balance notification

Implement voice notification either by using our PHLO visual workflow builder or our APIs and XML documents. Follow the instructions in one of the tabs below.

Using PHLO
Using XML

You can create and deploy a PHLO to send voice notifications with a few clicks on the PHLO canvas.

How it works

Prerequisites

To get started, you need a Plivo account — sign up with your work email address if you don’t have one already. If this is your first time triggering a PHLO with Node.js, follow our instructions to set up a Node.js development environment.

Create the PHLO

To create a PHLO, visit the PHLO page of the Plivo console. If this is your first PHLO, the PHLO page will be empty.

Click Create New PHLO.
In the Choose your use case pop-up, click Build my own. The PHLO canvas will appear with the Start node.
Note: The Start node is the starting point of any PHLO. It lets you trigger a PHLO to start upon one of three actions: incoming SMS message, incoming call, or API request.
Click the Start node to open the Configurations tab, then enter the information to retrieve from the HTTP Request payload — in this case, the From and To numbers for the call, and an item number.
From the list of components on the left side, drag and drop the Initiate Call component onto the canvas. This adds an Initiate Call node onto the canvas. When a component is placed on the canvas it becomes a node.
Draw a line to connect the Start node’s API Request trigger state to the Initiate Call node.
In the Configuration tab of the Initiate Call node, give the node a name. To enter values for the From and To fields, enter two curly brackets to view all available variables, and choose the appropriate ones. The values for the numbers will be retrieved from the HTTP Request payload you defined in the Start node.
Validate the configuration by clicking Validate. Do the same for each node as you go along.
Next, create a node from the Play Audio component. Connect the Initiate Call node to the Play Audio node using the Answered trigger state.
Configure the Play Audio node to play a message to the user by entering text in the Speak Text box in the Prompt section of the Configuration pane.
- Audio playback can either be static or dynamic. You define a static payload by specifying values when you create the PHLO, and a dynamic payload by passing values through Liquid templating parameters when you trigger the PHLO from your application.
- On the Play Audio Configuration tab, enter a static message (for example, “Your order has been successfully placed”) in the Speak Text field, with a variable to include the dynamic text. Enter two curly brackets to view all available variables. Choose the item number you defined in the Start node configuration tab.
After you complete and validate the node configurations, give the PHLO a name by clicking in the upper left, then click Save.

Your completed PHLO should look like this:

Your PHLO is now ready to test.

Trigger the PHLO

You integrate a PHLO into your application workflow by making an API request to trigger the PHLO with the required payload — the set of parameters you pass to the PHLO. You can define a static payload by specifying values when you create the PHLO, or define a dynamic payload by passing values through parameters when you trigger the PHLO from your application.

With a static payload

When you configure values when creating the PHLO, they act as a static payload.

Code

Create a file called TriggerPhlo.js and paste into it this code.

var plivo = require('plivo');
var PhloClient = plivo.PhloClient;

var authId = '<auth_id>';
var authToken = '<auth_token>';
var phloId = '<phlo_id>';
var phloClient = phlo = null;

phloClient = new PhloClient(authId, authToken);
phloClient.phlo(phloId).run().then(function (result) {
    console.log('Phlo run result', result);
}).catch(function (err) {
    console.error('Phlo run failed', err);
});

Replace the auth placeholders with your authentication credentials from the Plivo console. Replace the phlo_id placeholder with your PHLO ID from the Plivo console.

With a dynamic payload

To use dynamic values for the parameters, use Liquid templating parameters when you create the PHLO and pass the values from your code to the PHLO when you trigger it.

Code

Create a file called TriggerPhlo.js and paste into it this code.

var plivo = require('plivo');
var PhloClient = plivo.PhloClient;

var authId = '<auth_id>';
var authToken = '<auth_token>';
var phloId = '<phlo_id>';
var phloClient = phlo = null;

var payload = {
    from: '<caller_id>',
    to: '<destination_number>'
}
phloClient = new PhloClient(authId, authToken);
phloClient.phlo(phloId).run(payload).then(function (result) {
    console.log('Phlo run result', result);
}).catch(function (err) {
    console.error('Phlo run failed', err);
});

Replace the auth placeholders with your authentication credentials from the Plivo console. Replace the phlo_id placeholder with your PHLO ID from the Plivo console. Replace the phone number placeholders with actual phone numbers in E.164 format (for example, +12025551234).

Test

Save the file and run it.

node TriggerPhlo.js

Here’s how to use Plivo APIs and XML to implement voice notifications.

How it works

Plivo requests an answer URL when the call is answered (step 4) and expects the file at that address to hold a valid XML response from the application with instructions on how to handle the call. To see how this works, you can use https://s3.amazonaws.com/static.plivo.com/notification.xml as an answer URL to test your first outgoing call. The file contains this XML code:

<Response>
<Speak>Congratulations, your order was successfully placed</Speak>
</Response>

This code instructs Plivo to say, “Congratulations, your order was successfully placed” to the call recipient. You can find the entire list of valid Plivo XML verbs in our XML Reference documentation.

Prerequisites

To get started, you need a Plivo account — sign up with your work email address if you don’t have one already. If this is your first time using Plivo APIs, follow our instructions to set up a Node.js development environment.

Create a voice notification application in Node.js

Create a file called Makecall.js and paste into it this code.

var plivo = require('plivo');

(function main() {
    'use strict';

    var client = new plivo.Client("<auth_id>","<auth_token>");
    client.calls.create(
        "<caller_id>", // from
        "<destination_number>", // to
        "https://s3.amazonaws.com/static.plivo.com/notification.xml", // answer url
        {
            answerMethod: "GET",
        },
    ).then(function (response) {
        console.log(response);
    }, function (err) {
        console.error(err);
    });
})();

Replace the auth placeholders with your authentication credentials from the Plivo console. Replace the phone number placeholders with actual phone numbers in E.164 format (for example, +12025551234).

Note: We recommend that you store your credentials in the auth_id and auth_token environment variables, to avoid the possibility of accidentally committing them to source control. If you do this, you can initialize the client with no arguments and Plivo will automatically fetch the values from the environment variables. You can use process.env to store environment variables and fetch them while initializing the client.

Test

Save the file and run it.

$ node Makecall.js

Overview

This guide shows how to send audio notifications using voice calls. You can play recorded audio when the call recipient answers or use text-to-speech, as we show here, combining static text with dynamic information that Plivo gets from a variable.You can use voice notification for use cases such as:

Order notification
Booking status
Delivery status
Flight cancellation/rescheduling
Two-factor authentication/one-time password
New offer notification
Account balance notification

Implement voice notification either by using our PHLO visual workflow builder or our APIs and XML documents. Follow the instructions in one of the tabs below.

Using PHLO
Using XML

You can create and deploy a PHLO to send voice notifications with a few clicks on the PHLO canvas.

How it works

Prerequisites

To get started, you need a Plivo account — sign up with your work email address if you don’t have one already. If this is your first time triggering a PHLO with Ruby, follow our instructions to set up a Ruby development environment.

Create the PHLO

To create a PHLO, visit the PHLO page of the Plivo console. If this is your first PHLO, the PHLO page will be empty.

Click Create New PHLO.
In the Choose your use case pop-up, click Build my own. The PHLO canvas will appear with the Start node.
Note: The Start node is the starting point of any PHLO. It lets you trigger a PHLO to start upon one of three actions: incoming SMS message, incoming call, or API request.
Click the Start node to open the Configurations tab, then enter the information to retrieve from the HTTP Request payload — in this case, the From and To numbers for the call, and an item number.
From the list of components on the left side, drag and drop the Initiate Call component onto the canvas. This adds an Initiate Call node onto the canvas. When a component is placed on the canvas it becomes a node.
Draw a line to connect the Start node’s API Request trigger state to the Initiate Call node.
In the Configuration tab of the Initiate Call node, give the node a name. To enter values for the From and To fields, enter two curly brackets to view all available variables, and choose the appropriate ones. The values for the numbers will be retrieved from the HTTP Request payload you defined in the Start node.
Validate the configuration by clicking Validate. Do the same for each node as you go along.
Next, create a node from the Play Audio component. Connect the Initiate Call node to the Play Audio node using the Answered trigger state.
Configure the Play Audio node to play a message to the user by entering text in the Speak Text box in the Prompt section of the Configuration pane.
- Audio playback can either be static or dynamic. You define a static payload by specifying values when you create the PHLO, and a dynamic payload by passing values through Liquid templating parameters when you trigger the PHLO from your application.
- On the Play Audio Configuration tab, enter a static message (for example, “Your order has been successfully placed”) in the Speak Text field, with a variable to include the dynamic text. Enter two curly brackets to view all available variables. Choose the item number you defined in the Start node configuration tab.
After you complete and validate the node configurations, give the PHLO a name by clicking in the upper left, then click Save.

Your completed PHLO should look like this:

Your PHLO is now ready to test.

Trigger the PHLO

You integrate a PHLO into your application workflow by making an API request to trigger the PHLO with the required payload — the set of parameters you pass to the PHLO. You can define a static payload by specifying values when you create the PHLO, or define a dynamic payload by passing values through parameters when you trigger the PHLO from your application.

With a static payload

When you configure values when creating the PHLO, they act as a static payload.

Code

Create a file called trigger_phlo.rb and paste into it this code.

require 'rubygems'
require 'plivo'

include Plivo

AUTH_ID = '<auth_id>'
AUTH_TOKEN = '<auth_token>'

client = Phlo.new(AUTH_ID, AUTH_TOKEN)

# if credentials are stored in the PLIVO_AUTH_ID and the PLIVO_AUTH_TOKEN environment variables
# then initialize client as:
# client = Phlo.new

begin
  phlo = client.phlo.get('<phlo_id>')
  response = phlo.run()
  puts response
rescue PlivoRESTError => e
  puts 'Exception: ' + e.message
end

Replace the auth placeholders with your authentication credentials from the Plivo console. Replace the phlo_id placeholder with your PHLO ID from the Plivo console.

With a dynamic payload

To use dynamic values for the parameters, use Liquid templating parameters when you create the PHLO and pass the values from your code to the PHLO when you trigger it.

Code

Create a file called trigger_phlo.rb and paste into it this code.

require 'rubygems'
require 'plivo'

include Plivo

AUTH_ID = '<auth_id>'
AUTH_TOKEN = '<auth_token>'

client = Phlo.new(AUTH_ID, AUTH_TOKEN)

# if credentials are stored in the PLIVO_AUTH_ID and the PLIVO_AUTH_TOKEN environment variables
# then initialize client as:
# client = Phlo.new

begin
  phlo = client.phlo.get('<phlo_id>')
  #parameters set in PHLO - params
  params = {
     from: '<caller_id>',
     to: '<destination_number>'
  }
  response = phlo.run(params)
  puts response
rescue PlivoRESTError => e
  puts 'Exception: ' + e.message
end

Replace the auth placeholders with your authentication credentials from the Plivo console. Replace the phlo_id placeholder with your PHLO ID from the Plivo console. Replace the phone number placeholders with actual phone numbers in E.164 format (for example, +12025551234).

Test

Save the file and run it.

ruby trigger_phlo.rb

Here’s how to use Plivo APIs and XML to implement voice notifications.

How it works

Plivo requests an answer URL when the call is answered (step 4) and expects the file at that address to hold a valid XML response from the application with instructions on how to handle the call. To see how this works, you can use https://s3.amazonaws.com/static.plivo.com/notification.xml as an answer URL to test your first outgoing call. The file contains this XML code:

<Response>
<Speak>Congratulations, your order was successfully placed</Speak>
</Response>

This code instructs Plivo to say, “Congratulations, your order was successfully placed” to the call recipient. You can find the entire list of valid Plivo XML verbs in our XML Reference documentation.

Prerequisites

To get started, you need a Plivo account — sign up with your work email address if you don’t have one already. If this is your first time using Plivo APIs, follow our instructions to set up a Ruby development environment.

Create a voice notification application in Ruby

Create a file called make_call.rb and paste into it this code.

require 'rubygems'
require 'plivo'

include Plivo
include Plivo::Exceptions

api = RestClient.new("<auth_id>","<auth_token>")

begin
  response = api.calls.create(
    '<caller_id>',
    ['<destination_number>'],
    'https://s3.amazonaws.com/static.plivo.com/notification.xml'
  )
  puts response
rescue PlivoRESTError => e
  puts 'Exception: ' + e.message
end

Replace the auth placeholders with your authentication credentials from the Plivo console. Replace the phone number placeholders with actual phone numbers in E.164 format (for example, +12025551234).

Note: We recommend that you store your credentials in the auth_id and auth_token environment variables, to avoid the possibility of accidentally committing them to source control. If you do this, you can initialize the client with no arguments and Plivo will automatically fetch the values from the environment variables. You can use ENV to store environment variables and fetch them when initializing the client.

Test

Save the file and run it.

$ ruby make_call.rb

Overview

This guide shows how to send audio notifications using voice calls. You can play recorded audio when the call recipient answers or use text-to-speech, as we show here, combining static text with dynamic information that Plivo gets from a variable.You can use voice notification for use cases such as:

Order notification
Booking status
Delivery status
Flight cancellation/rescheduling
Two-factor authentication/one-time password
New offer notification
Account balance notification

Implement voice notification either by using our PHLO visual workflow builder or our APIs and XML documents. Follow the instructions in one of the tabs below.

Using PHLO
Using XML

You can create and deploy a PHLO to send voice notifications with a few clicks on the PHLO canvas.

How it works

Prerequisites

To get started, you need a Plivo account — sign up with your work email address if you don’t have one already. If this is your first time triggering a PHLO with Python, follow our instructions to set up a Python development environment.

Create the PHLO

To create a PHLO, visit the PHLO page of the Plivo console. If this is your first PHLO, the PHLO page will be empty.

Click Create New PHLO.
In the Choose your use case pop-up, click Build my own. The PHLO canvas will appear with the Start node.
Note: The Start node is the starting point of any PHLO. It lets you trigger a PHLO to start upon one of three actions: incoming SMS message, incoming call, or API request.
Click the Start node to open the Configurations tab, then enter the information to retrieve from the HTTP Request payload — in this case, the From and To numbers for the call, and an item number.
From the list of components on the left side, drag and drop the Initiate Call component onto the canvas. This adds an Initiate Call node onto the canvas. When a component is placed on the canvas it becomes a node.
Draw a line to connect the Start node’s API Request trigger state to the Initiate Call node.
In the Configuration tab of the Initiate Call node, give the node a name. To enter values for the From and To fields, enter two curly brackets to view all available variables, and choose the appropriate ones. The values for the numbers will be retrieved from the HTTP Request payload you defined in the Start node.
Validate the configuration by clicking Validate. Do the same for each node as you go along.
Next, create a node from the Play Audio component. Connect the Initiate Call node to the Play Audio node using the Answered trigger state.
Configure the Play Audio node to play a message to the user by entering text in the Speak Text box in the Prompt section of the Configuration pane.
- Audio playback can either be static or dynamic. You define a static payload by specifying values when you create the PHLO, and a dynamic payload by passing values through Liquid templating parameters when you trigger the PHLO from your application.
- On the Play Audio Configuration tab, enter a static message (for example, “Your order has been successfully placed”) in the Speak Text field, with a variable to include the dynamic text. Enter two curly brackets to view all available variables. Choose the item number you defined in the Start node configuration tab.
After you complete and validate the node configurations, give the PHLO a name by clicking in the upper left, then click Save.

Your completed PHLO should look like this:

Your PHLO is now ready to test.

Trigger the PHLO

You integrate a PHLO into your application workflow by making an API request to trigger the PHLO with the required payload — the set of parameters you pass to the PHLO. You can define a static payload by specifying values when you create the PHLO, or define a dynamic payload by passing values through parameters when you trigger the PHLO from your application.

With a static payload

When you configure values when creating the PHLO, they act as a static payload.

Code

Create a file called trigger_phlo.py and paste into it this code.

import plivo

auth_id = '<auth_id>'
auth_token = '<auth_token>'
phlo_id = '<phlo_id>'
phlo_client = plivo.phlo.RestClient(auth_id=auth_id, auth_token=auth_token)
phlo = phlo_client.phlo.get(phlo_id)
response = phlo.run()
print str(response)

Replace the auth placeholders with your authentication credentials from the Plivo console. Replace the phlo_id placeholder with your PHLO ID from the Plivo console.

With a dynamic payload

To use dynamic values for the parameters, use Liquid templating parameters when you create the PHLO and pass the values from your code to the PHLO when you trigger it.

Code

Create a file called trigger_phlo.py and paste into it this code.

import plivo

auth_id = '<auth_id>'
auth_token = '<auth_token>'
phlo_id = '<phlo_id>'
payload = {"from" : "<caller_id>","to" : "<destination_number>"}
phlo_client = plivo.phlo.RestClient(auth_id=auth_id, auth_token=auth_token)
phlo = phlo_client.phlo.get(phlo_id)
response = phlo.run(**payload)
print str(response)

Replace the auth placeholders with your authentication credentials from the Plivo console. Replace the phlo_id placeholder with your PHLO ID from the Plivo console. Replace the phone number placeholders with actual phone numbers in E.164 format (for example, +12025551234).

Test

Save the file and run it.

python trigger_phlo.py

Here’s how to use Plivo APIs and XML to implement voice notifications.

How it works

Plivo requests an answer URL when the call is answered (step 4) and expects the file at that address to hold a valid XML response from the application with instructions on how to handle the call. To see how this works, you can use https://s3.amazonaws.com/static.plivo.com/notification.xml as an answer URL to test your first outgoing call. The file contains this XML code:

<Response>
<Speak>Congratulations, your order was successfully placed</Speak>
</Response>

This code instructs Plivo to say, “Congratulations, your order was successfully placed” to the call recipient. You can find the entire list of valid Plivo XML verbs in our XML Reference documentation.

Prerequisites

To get started, you need a Plivo account — sign up with your work email address if you don’t have one already. If this is your first time using Plivo APIs, follow our instructions to set up a Python development environment.

Create a voice notification application in Python

Create a file called make_call.py and paste into it this code.

import plivo

client = plivo.RestClient('<auth_id>','<auth_token>')
response = client.calls.create(
    from='<caller_id>',
    to='<destination_number>',
    answer_url='https://s3.amazonaws.com/static.plivo.com/notification.xml',
    answer_method='GET', )
print(response)

Replace the auth placeholders with your authentication credentials from the Plivo console. Replace the phone number placeholders with actual phone numbers in E.164 format (for example, +12025551234).

Note: We recommend that you store your credentials in the auth_id and auth_token environment variables, to avoid the possibility of accidentally committing them to source control. If you do this, you can initialize the client with no arguments and Plivo will automatically fetch the values from the environment variables. You can use the os module (os.environ) to store environment variables and fetch them when initializing the client.

Test

Save the file and run it.

$ python make_call.py

Overview

This guide shows how to send audio notifications using voice calls. You can play recorded audio when the call recipient answers or use text-to-speech, as we show here, combining static text with dynamic information that Plivo gets from a variable.You can use voice notification for use cases such as:

Order notification
Booking status
Delivery status
Flight cancellation/rescheduling
Two-factor authentication/one-time password
New offer notification
Account balance notification

Implement voice notification either by using our PHLO visual workflow builder or our APIs and XML documents. Follow the instructions in one of the tabs below.

Using PHLO
Using XML

You can create and deploy a PHLO to send voice notifications with a few clicks on the PHLO canvas.

How it works

Prerequisites

To get started, you need a Plivo account — sign up with your work email address if you don’t have one already. If this is your first time triggering a PHLO with PHP, follow our instructions to set up a PHP development environment.

Create the PHLO

To create a PHLO, visit the PHLO page of the Plivo console. If this is your first PHLO, the PHLO page will be empty.

Click Create New PHLO.
In the Choose your use case pop-up, click Build my own. The PHLO canvas will appear with the Start node.
Note: The Start node is the starting point of any PHLO. It lets you trigger a PHLO to start upon one of three actions: incoming SMS message, incoming call, or API request.
Click the Start node to open the Configurations tab, then enter the information to retrieve from the HTTP Request payload — in this case, the From and To numbers for the call, and an item number.
From the list of components on the left side, drag and drop the Initiate Call component onto the canvas. This adds an Initiate Call node onto the canvas. When a component is placed on the canvas it becomes a node.
Draw a line to connect the Start node’s API Request trigger state to the Initiate Call node.
In the Configuration tab of the Initiate Call node, give the node a name. To enter values for the From and To fields, enter two curly brackets to view all available variables, and choose the appropriate ones. The values for the numbers will be retrieved from the HTTP Request payload you defined in the Start node.
Validate the configuration by clicking Validate. Do the same for each node as you go along.
Next, create a node from the Play Audio component. Connect the Initiate Call node to the Play Audio node using the Answered trigger state.
Configure the Play Audio node to play a message to the user by entering text in the Speak Text box in the Prompt section of the Configuration pane.
- Audio playback can either be static or dynamic. You define a static payload by specifying values when you create the PHLO, and a dynamic payload by passing values through Liquid templating parameters when you trigger the PHLO from your application.
- On the Play Audio Configuration tab, enter a static message (for example, “Your order has been successfully placed”) in the Speak Text field, with a variable to include the dynamic text. Enter two curly brackets to view all available variables. Choose the item number you defined in the Start node configuration tab.
After you complete and validate the node configurations, give the PHLO a name by clicking in the upper left, then click Save.

Your completed PHLO should look like this:

Your PHLO is now ready to test.

Trigger the PHLO

You integrate a PHLO into your application workflow by making an API request to trigger the PHLO with the required payload — the set of parameters you pass to the PHLO. You can define a static payload by specifying values when you create the PHLO, or define a dynamic payload by passing values through parameters when you trigger the PHLO from your application.

With a static payload

When you configure values when creating the PHLO, they act as a static payload.

Code

Create a file called TriggerPhlo.php and paste into it this code.

<?php
require 'vendor/autoload.php';
use Plivo\Resources\PHLO\PhloRestClient;
use Plivo\Exceptions\PlivoRestException;
$client = new PhloRestClient("<auth_id>", "<auth_token>");

$phlo = $client->phlo->get("<phlo_id>");
try {
    $response = $phlo->run();
    print_r($response);
} catch (PlivoRestException $ex) {
    print_r($ex);
}

Replace the auth placeholders with your authentication credentials from the Plivo console. Replace the phlo_id placeholder with your PHLO ID from the Plivo console.

With a dynamic payload

To use dynamic values for the parameters, use Liquid templating parameters when you create the PHLO and pass the values from your code to the PHLO when you trigger it.

Code

Create a file called TriggerPhlo.php and paste into it this code.

<?php
require 'vendor/autoload.php';
use Plivo\Resources\PHLO\PhloRestClient;
use Plivo\Exceptions\PlivoRestException;
$client = new PhloRestClient("<auth_id>", "<auth_token>");

$phlo = $client->phlo->get("<phlo_id>");
try {
    $response = $phlo->run(["from" => "<caller_id>", "to" => "<destination_number>"]);
    print_r($response);
} catch (PlivoRestException $ex) {
    print_r($ex);
}

Replace the auth placeholders with your authentication credentials from the Plivo console. Replace the phlo_id placeholder with your PHLO ID from the Plivo console. Replace the phone number placeholders with actual phone numbers in E.164 format (for example, +12025551234).

Test

Save the file and run it.

php TriggerPhlo.php

Here’s how to use Plivo APIs and XML to implement voice notifications.

How it works

Plivo requests an answer URL when the call is answered (step 4) and expects the file at that address to hold a valid XML response from the application with instructions on how to handle the call. To see how this works, you can use https://s3.amazonaws.com/static.plivo.com/notification.xml as an answer URL to test your first outgoing call. The file contains this XML code:

<Response>
<Speak>Congratulations, your order was successfully placed</Speak>
</Response>

This code instructs Plivo to say, “Congratulations, your order was successfully placed” to the call recipient. You can find the entire list of valid Plivo XML verbs in our XML Reference documentation.

Prerequisites

To get started, you need a Plivo account — sign up with your work email address if you don’t have one already. If this is your first time using Plivo APIs, follow our instructions to set up a PHP development environment.

Create a voice notification application in PHP

Create a file called MakeCall.php and paste into it this code:

<?php
require 'vendor/autoload.php';
use Plivo\RestClient;

$auth_id    = "<auth_id>";
$auth_token = "<auth_token>";
$p          = new RestClient($auth_id, $auth_token);

$response = $client->calls->create('<caller_id>',
                                 ['<destination_number>'],
                                 'https://s3.amazonaws.com/static.plivo.com/notification.xml',);
print_r($response);

Replace the auth placeholders with your authentication credentials from the Plivo console. Replace the phone number placeholders with actual phone numbers in E.164 format (for example, +12025551234).

Note: We recommend that you store your credentials in the auth_id and auth_token environment variables, to avoid the possibility of accidentally committing them to source control. If you do this, you can initialize the client with no arguments and Plivo will automatically fetch the values from the environment variables. You can use the $_ENV or putenv/getenv functions to store environment variables and fetch them when initializing the client.

Test

Save the file and run it.

$ php MakeCall.php

Overview

This guide shows how to send audio notifications using voice calls. You can play recorded audio when the call recipient answers or use text-to-speech, as we show here, combining static text with dynamic information that Plivo gets from a variable.You can use voice notification for use cases such as:

Order notification
Booking status
Delivery status
Flight cancellation/rescheduling
Two-factor authentication/one-time password
New offer notification
Account balance notification

Implement voice notification either by using our PHLO visual workflow builder or our APIs and XML documents. Follow the instructions in one of the tabs below.

Using PHLO
Using XML

You can create and deploy a PHLO to send voice notifications with a few clicks on the PHLO canvas.

How it works

Prerequisites

To get started, you need a Plivo account — sign up with your work email address if you don’t have one already. If this is your first time triggering a PHLO with .NET, follow our instructions to set up a .NET development environment.

Create the PHLO

To create a PHLO, visit the PHLO page of the Plivo console. If this is your first PHLO, the PHLO page will be empty.

Click Create New PHLO.
In the Choose your use case pop-up, click Build my own. The PHLO canvas will appear with the Start node.
Note: The Start node is the starting point of any PHLO. It lets you trigger a PHLO to start upon one of three actions: incoming SMS message, incoming call, or API request.
Click the Start node to open the Configurations tab, then enter the information to retrieve from the HTTP Request payload — in this case, the From and To numbers for the call, and an item number.
From the list of components on the left side, drag and drop the Initiate Call component onto the canvas. This adds an Initiate Call node onto the canvas. When a component is placed on the canvas it becomes a node.
Draw a line to connect the Start node’s API Request trigger state to the Initiate Call node.
In the Configuration tab of the Initiate Call node, give the node a name. To enter values for the From and To fields, enter two curly brackets to view all available variables, and choose the appropriate ones. The values for the numbers will be retrieved from the HTTP Request payload you defined in the Start node.
Validate the configuration by clicking Validate. Do the same for each node as you go along.
Next, create a node from the Play Audio component. Connect the Initiate Call node to the Play Audio node using the Answered trigger state.
Configure the Play Audio node to play a message to the user by entering text in the Speak Text box in the Prompt section of the Configuration pane.
- Audio playback can either be static or dynamic. You define a static payload by specifying values when you create the PHLO, and a dynamic payload by passing values through Liquid templating parameters when you trigger the PHLO from your application.
- On the Play Audio Configuration tab, enter a static message (for example, “Your order has been successfully placed”) in the Speak Text field, with a variable to include the dynamic text. Enter two curly brackets to view all available variables. Choose the item number you defined in the Start node configuration tab.
After you complete and validate the node configurations, give the PHLO a name by clicking in the upper left, then click Save.

Your completed PHLO should look like this:

Your PHLO is now ready to test.

Trigger the PHLO

You integrate a PHLO into your application workflow by making an API request to trigger the PHLO with the required payload — the set of parameters you pass to the PHLO. You can define a static payload by specifying values when you create the PHLO, or define a dynamic payload by passing values through parameters when you trigger the PHLO from your application.

With a static payload

When you configure values when creating the PHLO, they act as a static payload.

Code

Open the file in the CS project called Program.cs and paste into it this code.

using System;
using Plivo;

namespace test_PHLO
{
    class Program
    {
        public static void Main(string[] args)
        {
            var phloClient = new PhloApi("<auth_id>", "<auth_token>");
            var phloID = "<phlo_id>";
            var phlo = phloClient.Phlo.Get(phloID);
            Console.WriteLine(phlo.Run());
        }
    }
}

Replace the auth placeholders with your authentication credentials from the Plivo console. Replace the phlo_id placeholder with your PHLO ID from the Plivo console.

With a dynamic payload

To use dynamic values for the parameters, use Liquid templating parameters when you create the PHLO and pass the values from your code to the PHLO when you trigger it.

Code

Open the file in the CS project called Program.cs and paste into it this code.

using System;
using System.Collections.Generic;
using Plivo;

namespace test_PHLO
{
    class Program
    {
        public static void Main(string[] args)
        {
            var phloClient = new PhloApi("<auth_id>", "<auth_token>");
            var phloID = "<phlo_id>";
            var phlo = phloClient.Phlo.Get(phloID);
            var data = new Dictionary<string, object>
            {
                { "from", "<caller_id>" },
                { "to", "<destination_number>" }

            };
            Console.WriteLine(phlo.Run(data));
        }
    }
}

Replace the auth placeholders with your authentication credentials from the Plivo console. Replace the phlo_id placeholder with your PHLO ID from the Plivo console. Replace the phone number placeholders with actual phone numbers in E.164 format (for example, +12025551234).

Test

Save the file and run it.

Here’s how to use Plivo APIs and XML to implement voice notifications.

How it works

Plivo requests an answer URL when the call is answered (step 4) and expects the file at that address to hold a valid XML response from the application with instructions on how to handle the call. To see how this works, you can use https://s3.amazonaws.com/static.plivo.com/notification.xml as an answer URL to test your first outgoing call. The file contains this XML code:

<Response>
<Speak>Congratulations, your order was successfully placed</Speak>
</Response>

This code instructs Plivo to say, “Congratulations, your order was successfully placed” to the call recipient. You can find the entire list of valid Plivo XML verbs in our XML Reference documentation.

Prerequisites

To get started, you need a Plivo account — sign up with your work email address if you don’t have one already. If this is your first time using Plivo APIs, follow our instructions to set up a Dotnet development environment.

Create a voice notification application in C#

In Visual Studio, open the file in the CS project called Program.cs and paste into it this code.

using System;
using System.Collections.Generic;
using Plivo;

namespace testplivo
{
    class Program
    {
        static void Main(string[] args)
        {
            var api = new PlivoApi("<auth_id>","<auth_token>");
            var response = api.Call.Create(
                to: new List<String> { "<destination_number>" },
                from: "<caller_id>",
                answerMethod: "GET",
                answerUrl: "https://s3.amazonaws.com/static.plivo.com/notification.xml"
            );
            Console.WriteLine(response);
        }
    }
}

Replace the auth placeholders with your authentication credentials from the Plivo console. Replace the phone number placeholders with actual phone numbers in E.164 format (for example, +12025551234).

Note: We recommend that you store your credentials in the auth_id and auth_token environment variables, to avoid the possibility of accidentally committing them to source control. If you do this, you can initialize the client with no arguments and Plivo will automatically fetch the values from the environment variables. You can use the

<a href="https://docs.microsoft.com/en-us/dotnet/api/system.environment.setenvironmentvariable?view=netcore-3.1" rel="nofollow">Environment.SetEnvironmentVariable</a>

method to store environment variables and

<a href="https://docs.microsoft.com/en-us/dotnet/api/system.environment.getenvironmentvariable?view=netcore-3.1" rel="nofollow">Environment.GetEnvironmentVariable</a>

to fetch them when initializing the client.

Test

Save the file and run it.

Overview

This guide shows how to send audio notifications using voice calls. You can play recorded audio when the call recipient answers or use text-to-speech, as we show here, combining static text with dynamic information that Plivo gets from a variable.You can use voice notification for use cases such as:

Order notification
Booking status
Delivery status
Flight cancellation/rescheduling
Two-factor authentication/one-time password
New offer notification
Account balance notification

Implement voice notification either by using our PHLO visual workflow builder or our APIs and XML documents. Follow the instructions in one of the tabs below.

Using PHLO
Using XML

You can create and deploy a PHLO to send voice notifications with a few clicks on the PHLO canvas.

How it works

Prerequisites

To get started, you need a Plivo account — sign up with your work email address if you don’t have one already. If this is your first time triggering a PHLO with Java, follow our instructions to set up a Java development environment.

Create the PHLO

To create a PHLO, visit the PHLO page of the Plivo console. If this is your first PHLO, the PHLO page will be empty.

Click Create New PHLO.
In the Choose your use case pop-up, click Build my own. The PHLO canvas will appear with the Start node.
Note: The Start node is the starting point of any PHLO. It lets you trigger a PHLO to start upon one of three actions: incoming SMS message, incoming call, or API request.
Click the Start node to open the Configurations tab, then enter the information to retrieve from the HTTP Request payload — in this case, the From and To numbers for the call, and an item number.
From the list of components on the left side, drag and drop the Initiate Call component onto the canvas. This adds an Initiate Call node onto the canvas. When a component is placed on the canvas it becomes a node.
Draw a line to connect the Start node’s API Request trigger state to the Initiate Call node.
In the Configuration tab of the Initiate Call node, give the node a name. To enter values for the From and To fields, enter two curly brackets to view all available variables, and choose the appropriate ones. The values for the numbers will be retrieved from the HTTP Request payload you defined in the Start node.
Validate the configuration by clicking Validate. Do the same for each node as you go along.
Next, create a node from the Play Audio component. Connect the Initiate Call node to the Play Audio node using the Answered trigger state.
Configure the Play Audio node to play a message to the user by entering text in the Speak Text box in the Prompt section of the Configuration pane.
- Audio playback can either be static or dynamic. You define a static payload by specifying values when you create the PHLO, and a dynamic payload by passing values through Liquid templating parameters when you trigger the PHLO from your application.
- On the Play Audio Configuration tab, enter a static message (for example, “Your order has been successfully placed”) in the Speak Text field, with a variable to include the dynamic text. Enter two curly brackets to view all available variables. Choose the item number you defined in the Start node configuration tab.
After you complete and validate the node configurations, give the PHLO a name by clicking in the upper left, then click Save.

Your completed PHLO should look like this:

Your PHLO is now ready to test.

Trigger the PHLO

You integrate a PHLO into your application workflow by making an API request to trigger the PHLO with the required payload — the set of parameters you pass to the PHLO. You can define a static payload by specifying values when you create the PHLO, or define a dynamic payload by passing values through parameters when you trigger the PHLO from your application.

With a static payload

When you configure values when creating the PHLO, they act as a static payload.

Code

Create a Java class in the project called TriggerPhlo and paste into it this code.

import com.plivo.api.Plivo;
import com.plivo.api.PlivoClient;
import com.plivo.api.exceptions.PlivoRestException;
import com.plivo.api.models.phlo.Phlo;
import java.io.IOException;

public class Example
{
    private static final String authId = "<auth_id>";
    private static final String authToken = "<auth_token>";
    private static PlivoClient client = new PlivoClient(authId, authToken);
    public static void main(String[] args) throws IOException, PlivoRestException
    {
        String phloId = "<phlo_id>";
        Plivo.init(authId, authToken);
        Phlo phlo = Phlo.getter(phloId).client(client).get();
        PhloUpdateResponse response = Phlo.updater(phloId).payload().run();
    }
}

Replace the auth placeholders with your authentication credentials from the Plivo console. Replace the phlo_id placeholder with your PHLO ID from the Plivo console.

With a dynamic payload

To use dynamic values for the parameters, use Liquid templating parameters when you create the PHLO and pass the values from your code to the PHLO when you trigger it.

Code

Create a Java class in the project called TriggerPhlo and paste into it this code.

import com.plivo.api.Plivo;
import com.plivo.api.PlivoClient;
import com.plivo.api.exceptions.PlivoRestException;
import com.plivo.api.models.phlo.Phlo;
import java.io.IOException;

public class Example
{
    private static final String authId = "<auth_id>";
    private static final String authToken = "<auth_token>";
    private static PlivoClient client = new PlivoClient(authId, authToken);
    public static void main(String[] args) throws IOException, PlivoRestException
    {
        String phloId = "<phlo_id>";
        Plivo.init(authId, authToken);
        Phlo phlo = Phlo.getter(phloId).client(client).get();
        Map<String, Object> payload = new HashMap<>();
        payload.put("from", "<caller_id>");
        payload.put("to", "<destination_number>");
        PhloUpdateResponse response = Phlo.updater(phloId).payload(payload).run();
    }
}

Replace the auth placeholders with your authentication credentials from the Plivo console. Replace the phlo_id placeholder with your PHLO ID from the Plivo console. Replace the phone number placeholders with actual phone numbers in E.164 format (for example, +12025551234).

Test

Save the file and run it.

Here’s how to use Plivo APIs and XML to implement voice notifications.

How it works

Plivo requests an answer URL when the call is answered (step 4) and expects the file at that address to hold a valid XML response from the application with instructions on how to handle the call. To see how this works, you can use https://s3.amazonaws.com/static.plivo.com/notification.xml as an answer URL to test your first outgoing call. The file contains this XML code:

<Response>
<Speak>Congratulations, your order was successfully placed</Speak>
</Response>

This code instructs Plivo to say, “Congratulations, your order was successfully placed” to the call recipient. You can find the entire list of valid Plivo XML verbs in our XML Reference documentation.

Prerequisites

To get started, you need a Plivo account — sign up with your work email address if you don’t have one already. If this is your first time using Plivo APIs, follow our instructions to set up a Java development environment.

Create a voice notification application in Java

Create a Java class in the project MakeCall and paste into it this code.

import java.io.IOException;
import java.util.Collections;
import com.plivo.api.Plivo;
import com.plivo.api.exceptions.PlivoRestException;
import com.plivo.api.models.call.Call;
import com.plivo.api.models.call.CallCreateResponse;

class MakeCall {
    public static void main(String [] args) throws IOException, PlivoRestException {
        Plivo.init("<auth_id>","<auth_token>");
        CallCreateResponse response = Call.creator("<caller_id>",
                Collections.singletonList("<destination_number>"),
                "https://s3.amazonaws.com/static.plivo.com/notification.xml")
                .answerMethod("GET")
                .create();
        System.out.println(response);
    }
}

Replace the auth placeholders with your authentication credentials from the Plivo console. Replace the phone number placeholders with actual phone numbers in E.164 format (for example, +12025551234).

Note: We recommend that you store your credentials in the auth_id and auth_token environment variables, to avoid the possibility of accidentally committing them to source control. If you do this, you can initialize the client with no arguments and Plivo will automatically fetch the values from the environment variables. You can use <a rel="nofollow" href="https://docs.oracle.com/javase/tutorial/essential/environment/env.html">System.getenv()</a> to store environment variables and retrieve them when initializing the client.

Test

Save the file and run it.

Overview

This guide shows how to send audio notifications using voice calls. You can play recorded audio when the call recipient answers or use text-to-speech, as we show here, combining static text with dynamic information that Plivo gets from a variable.You can use voice notification for use cases such as:

Order notification
Booking status
Delivery status
Flight cancellation/rescheduling
Two-factor authentication/one-time password
New offer notification
Account balance notification

Implement voice notification either by using our PHLO visual workflow builder or our APIs and XML documents. Follow the instructions in one of the tabs below.

Using PHLO
Using XML

You can create and deploy a PHLO to send voice notifications with a few clicks on the PHLO canvas.

How it works

Prerequisites

To get started, you need a Plivo account — sign up with your work email address if you don’t have one already. If this is your first time triggering a PHLO with Go, follow our instructions to set up a Go development environment.

Create the PHLO

To create a PHLO, visit the PHLO page of the Plivo console. If this is your first PHLO, the PHLO page will be empty.

Click Create New PHLO.
In the Choose your use case pop-up, click Build my own. The PHLO canvas will appear with the Start node.
Note: The Start node is the starting point of any PHLO. It lets you trigger a PHLO to start upon one of three actions: incoming SMS message, incoming call, or API request.
Click the Start node to open the Configurations tab, then enter the information to retrieve from the HTTP Request payload — in this case, the From and To numbers for the call, and an item number.
From the list of components on the left side, drag and drop the Initiate Call component onto the canvas. This adds an Initiate Call node onto the canvas. When a component is placed on the canvas it becomes a node.
Draw a line to connect the Start node’s API Request trigger state to the Initiate Call node.
In the Configuration tab of the Initiate Call node, give the node a name. To enter values for the From and To fields, enter two curly brackets to view all available variables, and choose the appropriate ones. The values for the numbers will be retrieved from the HTTP Request payload you defined in the Start node.
Validate the configuration by clicking Validate. Do the same for each node as you go along.
Next, create a node from the Play Audio component. Connect the Initiate Call node to the Play Audio node using the Answered trigger state.
Configure the Play Audio node to play a message to the user by entering text in the Speak Text box in the Prompt section of the Configuration pane.
- Audio playback can either be static or dynamic. You define a static payload by specifying values when you create the PHLO, and a dynamic payload by passing values through Liquid templating parameters when you trigger the PHLO from your application.
- On the Play Audio Configuration tab, enter a static message (for example, “Your order has been successfully placed”) in the Speak Text field, with a variable to include the dynamic text. Enter two curly brackets to view all available variables. Choose the item number you defined in the Start node configuration tab.
After you complete and validate the node configurations, give the PHLO a name by clicking in the upper left, then click Save.

Your completed PHLO should look like this:

Your PHLO is now ready to test.

Trigger the PHLO

You integrate a PHLO into your application workflow by making an API request to trigger the PHLO with the required payload — the set of parameters you pass to the PHLO. You can define a static payload by specifying values when you create the PHLO, or define a dynamic payload by passing values through parameters when you trigger the PHLO from your application.

With a static payload

When you configure values when creating the PHLO, they act as a static payload.

Code

Create a file called TriggerPhlo.go and paste into it this code.

package main

import (
	"fmt"
	"plivo-go"
)
// Initialize the following params with corresponding values to trigger resources
const authId = "<auth_id>"
const authToken = "<auth_token>"
const phloId = "<phlo_id>"

func main() {
	testPhloRunWithoutParams()
}

func testPhloRunWithoutParams() {
	phloClient, err := plivo.NewPhloClient(authId, authToken, &plivo.ClientOptions{})
	if err != nil {
			fmt.Print("Error", err.Error())
			return
		}
	phloGet, err := phloClient.Phlos.Get(phloId)
	if err != nil {
			fmt.Print("Error", err.Error())
			return
		}
	response, err := phloGet.Run(nil)
	if err != nil {
			fmt.Print("Error", err.Error())
			return
		}
	fmt.Printf("Response: %#v\n", response)
}

Replace the auth placeholders with your authentication credentials from the Plivo console. Replace the phlo_id placeholder with your PHLO ID from the Plivo console.

With a dynamic payload

To use dynamic values for the parameters, use Liquid templating parameters when you create the PHLO and pass the values from your code to the PHLO when you trigger it.

Code

Create a file called TriggerPhlo.go and paste into it this code.

package main

import (
	"fmt"
	"plivo-go"
)
// Initialize the following params with corresponding values to trigger resources
const authId = "<auth_id>"
const authToken = "<auth_token>"
const phloId = "<phlo_id>"

func main() {
	testPhloRunWithParams()
}

func testPhloRunWithParams() {
	phloClient, err := plivo.NewPhloClient(authId, authToken, &plivo.ClientOptions{})
	if err != nil {
			fmt.Print("Error", err.Error())
			return
		}
	phloGet, err := phloClient.Phlos.Get(phloId)
	if err != nil {
			fmt.Print("Error", err.Error())
			return
		}
	//pass corresponding from and to values
	type params map[string]interface{}
	response, err := phloGet.Run(params{
		"from": "<caller_id>",
		"to":   "<destination_number>",
	})

	if err != nil {
		println(err)
	}
	fmt.Printf("Response: %#v\n", response)
}

Replace the auth placeholders with your authentication credentials from the Plivo console. Replace the phlo_id placeholder with your PHLO ID from the Plivo console. Replace the phone number placeholders with actual phone numbers in E.164 format (for example, +12025551234).

Test

Save the file and run it.

go run TriggerPhlo.go

Here’s how to use Plivo APIs and XML to implement voice notifications.

How it works

Plivo requests an answer URL when the call is answered (step 4) and expects the file at that address to hold a valid XML response from the application with instructions on how to handle the call. To see how this works, you can use https://s3.amazonaws.com/static.plivo.com/notification.xml as an answer URL to test your first outgoing call. The file contains this XML code:

<Response>
<Speak>Congratulations, your order was successfully placed</Speak>
</Response>

This code instructs Plivo to say, “Congratulations, your order was successfully placed” to the call recipient. You can find the entire list of valid Plivo XML verbs in our XML Reference documentation.

Prerequisites

To get started, you need a Plivo account — sign up with your work email address if you don’t have one already. If this is your first time using Plivo APIs, follow our instructions to set up a Go development environment.

Create a voice notification application in Go

Create a file called MakeCall.go and paste into it this code.

package main

import "fmt"
import "github.com/plivo/plivo-go/v7"

func main() {
	client, err := plivo.NewClient("<auth_id>","<auth_token>", &plivo.ClientOptions{})
	if err != nil {
			fmt.Print("Error", err.Error())
			return
		}
	response, err := client.Calls.Create(
		plivo.CallCreateParams{
			From: "<caller_id>",
			To: "<destination_number>",
			AnswerURL: "https://s3.amazonaws.com/static.plivo.com/notification.xml",
			AnswerMethod: "GET",
		},
	)
	if err != nil {
			fmt.Print("Error", err.Error())
			return
		}
	fmt.Printf("Response: %#v\n", response)
}

Replace the auth placeholders with your authentication credentials from the Plivo console. Replace the phone number placeholders with actual phone numbers in E.164 format (for example, +12025551234).

Note: We recommend that you store your credentials in the auth_id and auth_token environment variables, to avoid the possibility of accidentally committing them to source control. If you do this, you can initialize the client with no arguments and Plivo will automatically fetch the values from the environment variables. You can use the os.Setenv and os.Getenv functions to store environment variables and fetch them when initializing the client.

Test

Save the file and run it.

go run MakeCall.go

AI Voice Agents

Getting Started

Use Case Guides

API Reference

XML Reference

Voice Concepts

Troubleshooting

​Overview

​How it works

​Prerequisites

​Create the PHLO

​Trigger the PHLO

​With a static payload

​Code

​With a dynamic payload

​Code

​Test

​How it works

​Prerequisites

​Create a voice notification application in Node.js

​Test

​Overview

​How it works

​Prerequisites

​Create the PHLO

​Trigger the PHLO

​With a static payload

​Code

​With a dynamic payload

​Code

​Test

​How it works

​Prerequisites

​Create a voice notification application in Ruby

​Test

​Overview

​How it works

​Prerequisites

​Create the PHLO

​Trigger the PHLO

​With a static payload

​Code

​With a dynamic payload

​Code

​Test

​How it works

​Prerequisites

​Create a voice notification application in Python

​Test

​Overview

​How it works

​Prerequisites

​Create the PHLO

​Trigger the PHLO

​With a static payload

​Code

​With a dynamic payload

​Code

​Test

​How it works

​Prerequisites

​Create a voice notification application in PHP

​Test

​Overview

​How it works

​Prerequisites

​Create the PHLO

​Trigger the PHLO

​With a static payload

​Code

​With a dynamic payload

​Code

​Test

​How it works

​Prerequisites

​Create a voice notification application in C#

​Test

​Overview

​How it works

​Prerequisites

Overview

How it works

Prerequisites

Create the PHLO

Trigger the PHLO

With a static payload

Code

With a dynamic payload

Code

Test

How it works

Prerequisites

Create a voice notification application in Node.js

Test

Overview

How it works

Prerequisites

Create the PHLO

Trigger the PHLO

With a static payload

Code

With a dynamic payload

Code

Test

How it works

Prerequisites

Create a voice notification application in Ruby

Test

Overview

How it works

Prerequisites

Create the PHLO

Trigger the PHLO

With a static payload

Code

With a dynamic payload

Code

Test

How it works

Prerequisites

Create a voice notification application in Python

Test

Overview

How it works

Prerequisites

Create the PHLO

Trigger the PHLO

With a static payload

Code

With a dynamic payload

Code

Test

How it works

Prerequisites

Create a voice notification application in PHP

Test

Overview

How it works

Prerequisites

Create the PHLO

Trigger the PHLO

With a static payload

Code

With a dynamic payload

Code

Test

How it works

Prerequisites

Create a voice notification application in C#

Test

Overview

How it works

Prerequisites

Create the PHLO

Trigger the PHLO

With a static payload

Code

With a dynamic payload

Code

Test