> For the complete documentation index, see [llms.txt](https://docs.kerberus.com/kerberus/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.kerberus.com/kerberus/frequently-asked-questions/lifetime-license-nft-faq/how-can-i-get-one.md).

# How can I get one?

[**OpenSea**](https://opensea.io/collection/sentinel3). After you buy one, you must [**activate it following these instructions**](/kerberus/frequently-asked-questions/lifetime-license-nft-faq/how-do-i-activate-it.md).