# 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 %}


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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.oneroute.io/introduction.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.