LocalStack is a platform that facilitates the development of cloud-based applications by hosting locally a series of replicas of AWS services. In this post, we’ll see how to configure Tye to use LocalStack services and how to configure ASP.NET Core applications to consume those services when available. Once Tye is done initializing the application, we can test the emulated services as if they were normal AWS services. LocalStack offers many configuration options. For this test, we will be using the S3 API. Let’s start by fetching a list of buckets.