> For the complete documentation index, see [llms.txt](https://docs.zaui.com/zapi/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.zaui.com/zapi/zapi-calls/interacting-with-a-cart/transactions.md).

# Transactions

- [Process Payment](https://docs.zaui.com/zapi/zapi-calls/interacting-with-a-cart/transactions/process-payment.md): Process Cart with Payment is used to create a new booking from the cart contents.
- [Process Single Transaction](https://docs.zaui.com/zapi/zapi-calls/interacting-with-a-cart/transactions/process-single-transaction.md): This method is used to create all transactions on open ZAPI cart objects (this includes refunds).
- [Apply Promo Code](https://docs.zaui.com/zapi/zapi-calls/interacting-with-a-cart/transactions/apply-promo-code.md)
- [Apply Gift Card](https://docs.zaui.com/zapi/zapi-calls/interacting-with-a-cart/transactions/apply-gift-card.md)