JWT Authentication for Microservices in ASP.NET Core

Two years ago, I published the JWT Authentication for Microservices in .NET article, and it got some pretty good traction. In the meantime, things have changed and .NET Core became the standard. With ASP.NET Core 3.1 receiving long term support, it’s time to update the article to 2020.

First, let’s give this some context: one of the things you need to think of when developing a microservice architecture is authenticating the user across the whole system, when they are trying to perform an action.