This document discusses using the AadHttpClient to connect SharePoint Framework (SPFx) solutions to APIs secured with Azure Active Directory (Azure AD) without needing to handle authentication headaches. The AadHttpClient handles requesting and including access tokens in API calls automatically. Administrators configure which API permissions are available by setting permissions for a pre-provisioned Azure AD application. This allows SPFx solutions to connect to secured APIs seamlessly without having to specify reply URLs or handle multiple requests for tokens.