Amplify AppSync Simulator

A local simulator for AWS AppSync APIs, enabling developers to test GraphQL operations and resolvers without direct cloud resources. Part of the Amplify CLI ecosystem, this package (version 2.4.1 as per npm) allows offline development by mimicking AppSync behavior including VTL and JavaScript resolvers, pipeline functions, and authentication modes. It supports unit testing of resolvers and mocking of data sources, reducing deployment cycles. Maintained by AWS, it releases in lockstep with Amplify CLI (~monthly). Unlike alternatives like appsync-simulator, it integrates tightly with Amplify's schema and configuration files.