There are various ways in which you can host your Web API, and you need not always have to host your Web API in IIS. You can host it in a separate process as well.

Microsoft is allowing UWP developers to simplify payments in their apps with a Payment Request API. The company previously announced a preview of the API for Microsoft Edge late last year.

Voice Agent API Is Industry's Only Offering That Delivers The Single, Real-Time API Experience Developers Love, Combined with Full Controllability Enterprises Need.