> For the complete documentation index, see [llms.txt](https://xai-foundation.gitbook.io/xai-network/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://xai-foundation.gitbook.io/xai-network/kn/about-xai/sentry-key-purchase-and-setup/step-1-purchase-a-sentry-key/option-2-buy-sentry-key-via-xai-sentry-node-desktop-app.md).
# Option 2: Buy Sentry Key via Xai Sentry Node desktop app
#### **If you've already downloaded the Xai Sentry Node desktop app, you can initiate buying keys via the desktop application. See steps below:**
1. Navigate to the Keys page in the desktop application.
2. Click "Purchase Keys" on the Keys page.
3. Enter your desired quantity.
{% hint style="warning" %}
* The recommended max quantity per transaction is 100 keys. Purchasing more than 100 keys in a single transaction will likely fail due to gas limits on Arbitrum One. There is no limit to the number of Keys per wallet.
* #### The price you see below is only for demo purposes - this is not a real key and not a final price.
{% endhint %}
4. Enter a promo code (if you have one).
5. Click "Confirm Purchase". This will pop you out to a web browser.
{% hint style="info" %}
Xai Sentry Key purchases will only ever take place on the xai.games domain. Check that you are on xai.games whenever purchasing Xai Sentry Keys.
{% endhint %}
6. Complete the remaining steps using the guide below:
{% @supademo/embed demoId="mkRyp8eTNZByn6edaoyi8" url="" %}