How can I incorporate Add to cart and Checkout cart in one API rather than 2 calls.

[Shalaka]

Hi All,

Can I provide Add to cart API to 3rd party system and checkout the cart using default cart in ServiceNow, so that 3rd Party system has to call ServiceNow API once?

or

How can I incorporate 2 APIs in one scripted Rest API. Has anyone tried this approach?

Thanks,

Shalaka