Quick Answer
For Dynamics 365 applications that use Microsoft Dataverse, the “Dynamics 365 Web API” is the Dataverse Web API, an OData v4 REST endpoint that lets authenticated applications read and modify business data over HTTPS. Current Microsoft examples use the /api/data/v9.2/ endpoint. You authenticate with Microsoft Entra ID using OAuth, then call table endpoints with standard HTTP methods such as GET, POST, PATCH, and DELETE. For server-to-server integrations, the Microsoft Entra application should also be represented by an application user in the Dataverse environment with an appropriate security role.

