> For the complete documentation index, see [llms.txt](https://docs.link11.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.link11.com/product-guides/web-ddos/interface/api-access.md).

# API Access

<div align="left"><figure><img src="/files/BdulshPgacIJiKYoWDTa" alt=""><figcaption></figcaption></figure></div>

The Link11 Web DDoS Protection service has an API (application programming interface). Commands can be sent against individual instances.

To set up an API connection, start by clicking the Edit button.

<div align="left"><figure><img src="/files/hvCAiLUK9fUXUjWxQ1A3" alt=""><figcaption></figcaption></figure></div>

This will open the API Access List. Whitelist your network IP address here:

<div align="left"><figure><img src="/files/1csJW2EifZNW18Ion8eX" alt=""><figcaption></figcaption></figure></div>

Clicking on Edit will save the changes made.&#x20;

After this, click on the Show API Key for the appropriate instance:

<div align="left"><figure><img src="/files/7eDsAS00a7CXgH4UlpwW" alt=""><figcaption></figcaption></figure></div>

This will display a passcode, known in the API documentation as a [Domain Key](/using-link11/api/introduction.md#domain-keys). To use the API, this passcode must be sent from a whitelisted IP.

With those two requirements being met, you can now begin to [use the API](/using-link11/api/introduction.md#introduction-to-the-link11-api).<br>