Microsoft Azure API Management allows developers to set up API facades between disparate applications and services. Microsoft is extending this offering through a Consumption tier aimed at supporting serverless environments. The Consumption tier is currently in preview.
GraphQuill, a VS Code extension that performs GraphQL API testing within the VS Code environment, was recently released in beta. The goal of GraphQuill is to eliminate the need for switching between VS Code and GraphiQL, Postman, or some other API development tool during development and testing.