# Introduction

### Prerequisites

The prerequisites list everything you need to do to gain access to the OneRoute APIs.

{% content-ref url="prerequisites" %}
[prerequisites](https://docs.oneroute.io/prerequisites)
{% endcontent-ref %}

Using the [OneRoute](https://oneroute.io/) API documentation, you can send and receive messages from customers via the supported channels.

### WhatsApp

The WhatsApp Business API enables you to reliably send and receive Whatsapp messages to/from your customers.

{% content-ref url="whatsapp-api/getting-started" %}
[getting-started](https://docs.oneroute.io/whatsapp-api/getting-started)
{% endcontent-ref %}

### SMS

The SMS API enables you to send messages to your customers via SMS.

{% content-ref url="sms-api/sms-api" %}
[sms-api](https://docs.oneroute.io/sms-api/sms-api)
{% endcontent-ref %}

### OneOTP

The OneOTP API allows you to reliably send One-Time Passwords via SMS, Whatsapp, Email, USSD, and Voice from a single, robust API.

{% content-ref url="oneotp-api/oneotp-api" %}
[oneotp-api](https://docs.oneroute.io/oneotp-api/oneotp-api)
{% endcontent-ref %}