> For the complete documentation index, see [llms.txt](https://docs.oneroute.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.oneroute.io/introduction.md).

# Introduction

### Prerequisites

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

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[Prerequisites](/prerequisites.md)
{% 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.

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[Getting Started](/whatsapp-api/getting-started.md)
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### SMS

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

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[Endpoints](/sms-api/sms-api.md)
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### OneOTP

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

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[Endpoints](/oneotp-api/oneotp-api.md)
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