> ## Documentation Index
> Fetch the complete documentation index at: https://docs.otpiq.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Introduction

> OTPIQ API reference guide

## Welcome to OTPIQ API

This is the complete API reference guide for OTPIQ. Here you'll find all the information you need to integrate with our services.

## Authentication

All OTPIQ API endpoints require authentication using your API key. Include your API key in the Authorization header of every request.

```bash theme={null}
Authorization: Bearer YOUR_API_KEY
```

<Warning>
  Keep your API key secure and never expose it in client-side code or public
  repositories.
</Warning>