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

# Authentication

> Secure your requests using Bearer tokens.

All requests to the PDFDyno API require authentication.

We use standard **Bearer Tokens** for authentication. You must include your API key in the `Authorization` header of every HTTP request.

## Using the Authorization Header

Include the following header in your requests:

```http theme={null}
Authorization: Bearer sk_live_YOUR_API_KEY
```

<Note>
  Keep your API keys secret. Never expose them in client-side code (like the browser or mobile apps). Always call the PDFDyno API from your backend servers.
</Note>

## Finding your API Key

1. Log in to the [PDFDyno Dashboard](https://pdfdyno.com/login).
2. Navigate to the **API Keys** section.
3. Click **Generate New Key**.

<Warning>
  For security reasons, your API key will only be shown to you **once**. If you lose it, you will need to revoke it and generate a new one.
</Warning>