> For the complete documentation index, see [llms.txt](https://docs.zebec.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.zebec.io/zebec-silver-card/silver-card-sdk/environment-variables.md).

# Environment Variables

* **API\_KEY**: Your Zebec API Key.
* **ENCRYPTION\_KEY**: Your Zebec encryption key for secure data handling.