If you’ve built code that works with any modern API-first design model, such as gRPC, then you won’t have any difficulty building a custom handler to work with Azure Functions.

Furthermore, since Azure Static Web Apps integrates with Azure Functions, developers can opt to extend their app with serverless API endpoints. In an Azure blog post on the GA release, ...

In addition to Web apps, the service accommodates: API Apps for hosting RESTful APIs; Azure Functions for hosting serverless workloads; native and cross-platform mobile apps; and Web Apps for ...