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

# Introduction

> Discover how to accept cryptocurrency payments with BitGPT 402pay and manage your organizations programmatically using our APIs.

## Not Sure Where to Start?

Below is a curated list of key documentation topics to help you get started with us:

<CardGroup cols={2}>
  <Card title="Authentication" icon="lock" href="./authentication" arrow="true">
    Use your API key to securely authenticate your requests.
  </Card>

  <Card title="Errors" icon="bomb" href="./errors" arrow="true">
    Understand common errors and how to handle them effectively.
  </Card>

  <Card title="Payments" icon="credit-card" href="/recipes/accept-payment" arrow="true">
    Accept payments in both FIAT and Crypto currencies.
  </Card>

  <Card title="Webhooks" icon="webhook" href="/developer-resources/webhooks/overview" arrow="true">
    Get real-time notifications by integrating webhooks.
  </Card>
</CardGroup>

## API Reference & Support

On the left-hand side of the screen, you’ll find the full API Reference. It includes every available endpoint, complete with mock requests and responses to help you prototype and build quickly.

## Need Help?

Please contact us at [support@bitgpt.xyz](mailto:support@bitgpt.xyz) for any support-related questions.