I will demonstrate how to secure Web API by using Azure AD, then use Out-of-the-Box features of the SharePoint Framework to connect to the Web API from SharePoint Online site. In another demo, I will show how Microsoft Authentication Library (MSAL) can be used to safely call the Azure API from a SharePoint On-Premise SPFx solution. I will also talk on how to leverage the use of isolated web parts, a model to connect securely to API without exposing the token to other components on the page.