Introduction

In this tutorial, you will learn how to create a Client SDK application and then write the code to make a phone call from your web app to another web app.

To achieve this, you will create:

• A web application that will make the app to app voice call using the Client SDK.
• A publicly accessible URL that serves instructions, an NCCO, on how to handle the call. You will use a GitHub Gist to accomplish this. GitHub Gists are a simple way to share code snippets with others.

When the in-app call is triggered from your application, Vonage will use the NCCO from GitHub Gist and forward the call to the destination app.