> For the complete documentation index, see [llms.txt](https://help.screena.ai/resources/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.screena.ai/resources/faq/watchlists/how-is-watchlist-data-loaded-into-screena.md).

# How is watchlist data loaded into Screena?

Watchlist data can be uploaded either automatically from public or commercial sources, or on demand (private lists).

[Public watchlists](/resources/faq/watchlists/which-lists-are-available-out-of-the-box.md), also known as Open Source Intelligence lists (OSINT), are crawled from the internet in their original formats (XML, CSV, JSON).

Likewise, Commercial Off-The-Shelve lists (COTS) are uploaded in their native formats – including full stock and deltas. Integrating lists from third-party data vendors only requires a user and password to allow the Screena application to download the lists from the vendor's portal. You must purchase a license from the data vendor of your choice to obtain a user and password.

Private lists can be uploaded through the API in JSON or CSV format. All private lists containing personally identifiable information are encrypted in transit and at rest.

{% hint style="info" %}
To learn how to upload your private list into Screena, check the answer to this question: [Is there a template to upload private lists into Screena?](#is-there-a-template-to-upload-private-lists-into-screena)
{% endhint %}