The GraphQL debugging tool for Apollo Client in the Chrome developer console.
Project Artemis is an Open Sourced client developer tool for single endpoint testing of GraphQL queries (w/wo Apollo Client). Query endpoint testing and cache management can be done in real time for instant engineering feedback without the need for backend resolvers.
Debug and test query mutations and calls using introspection
The web based extension is best used for React and Express products/applications in development mode, and is available at the chrome store.