Azure Functions

Azure Functions runs code without you managing a server. A function can be triggered by HTTP, a timer, a queue message, an Event Grid event, or several other sources.

It is a good place for small bits of logic that are too specific for a no-code workflow but not large enough to justify a full application. For example, a Logic App might call a function to generate a SAS token because the signing logic is easier and safer in code.

Serverless does not mean “no operations”. You still need to think about identity, logging, retries, cold starts, dependencies, and who can call the function.