> For the complete documentation index, see [llms.txt](https://docs.vault.cnn.com/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.vault.cnn.com/docs/the-vault-collections/community-items/keys.md).

# Keys

Special NFTs that unlock mystery bonus content and upgrades within the Vault ecosystem

* Environment Key