> For the complete documentation index, see [llms.txt](https://docs.apryse.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.apryse.com/support/faq/key-init.md).

# Initialize with a valid key

## Evaluation

For more details please see the corresponding documentation for your platform.

## Purchased license

If you have purchased a license key from Apryse, then you would pass it into your call to `PDFNet.Initialize` or into your WebViewer constructor's `l` parameter. You should have received more detail instructions in the email that sent you the purchased license key.

{% hint style="info" %}
**Multiple production keys**

While you are evaluating our products a single demo key can be used everywhere, however when you purchase a license, you may receive multiple license keys, for use on different platforms.
{% endhint %}


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## 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, and the optional `goal` query parameter:

```
GET https://docs.apryse.com/support/faq/key-init.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

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.