Tutorials

Get started with Nexmo with tutorials that will walk you through building a variety of practical applications


Voice Smart local numbers

Replace your toll-free numbers (e.g. 800, 0800) with easy to use, smart local numbers that allow you to provide a better customer service.

Language: Ruby

Voice Call whisper using onAnswer

Play a message to a call before connecting it to another call

Language: Node

Voice Add a Call whisper to an inbound call

Phone numbers are everywhere in advertising: on billboards, in TV ads, on websites, in newspapers. Often these numbers all redirect to the same call center, where an agent needs to inquire why the person is calling, and where they saw the advert. Call Whispers make this so much simpler.

Language: Node

SMS Mobile app invites

Link your customers to your app with SMS

Language: Ruby

Verify Two-factor authentication for security and spam prevention

Increase your application security

Language: Ruby

SMS SMS Customer Support

Programmable SMS is not just useful for one way notifications. When you combine outbound notifications with inbound messages you create chat-like interactions between your company and your customers.

Language: Ruby

SMS Private SMS communication

All mobile phones can send and receive SMS messages, and nearly everybody has a phone. This makes SMS a great choice to communicate with your users from your application.

Language: Node

SMS Two-way SMS for customer engagement

Programmable SMS is not just useful for one way notifications. When you combine outbound notifications with inbound messages you create chat-like interactions between your company and your customers.

Language: Ruby

Number Insight Validate a number

Use the Number Insight and Developer API from Ruby code to validate, sanitize and determine the cost to call or message a number.

Language: Ruby

Number Insight Fraud scoring and phone number verification

While it would be easy to confirm a phone number with Nexmo Verify every time a user provides you with their number this is hardly always necessary. By combining Nexmo Verify with Nexmo Number Insight, and applying your own fraud scoring logic, it is easy to build your own fraud detection system.

Language: Node

Voice Call tracking

We live in a world of data and analytics where we use unique identifiers to measure the impact of past decisions in order to fine tune future ones. You can use phone numbers in this way too. For example, you track the most popular phone numbers used for television radio, magazine, print or online advertising, and the times those phone numbers are used, in order to improve future campaigns.

Language: Node

Voice Private voice communication

Protect user's number privacy by connecting users together for private voice communication.

Language: Node

Voice Broadcast Voice-based Critical Alerts

In this tutorial, you will learn how to send out voice messages and see who was contacted, who responded, and when. These voice-based critical alerts are more persistent than a text message, making your message more likely to be noticed. Additionally, with the recipient confirmation, you can be sure that your message made it through.

Language: PHP

Voice Interactive Voice Response

Make it easy for visitors to navigate an Interactive Voice Response (IVR) application with simple text-to-speech (TTS) prompts.

Language: PHP

Number Insight Phone number validation

By asking your customer to provide a phone number — and then validating the legitimacy of that number — you minimize fraud and ensure that you can easily contact that customer in the future.

Language: Ruby

Verify Passwordless authentication

Using the Verify API to allow users to login to a Ruby application.

Language: Ruby