> For the complete documentation index, see [llms.txt](https://developers.usetoggle.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developers.usetoggle.com/basics.md).

# Basics

- [Create a card](https://developers.usetoggle.com/basics/create-a-card.md): Simple card creation
- [Custom validity rules](https://developers.usetoggle.com/basics/create-a-card/custom-validity-rules.md)
- [Balance Check](https://developers.usetoggle.com/basics/card-balance.md)
- [Redeem / Top up a card](https://developers.usetoggle.com/basics/redeem-a-card.md)