Bruno

Bruno is an open-source, Git-native, offline-first API client for exploring and testing APIs. It stores collections directly on the filesystem as plain text files using the Bru markup language, making collections version-controllable alongside code. Bruno supports REST, GraphQL, and gRPC APIs, scripting with JavaScript, environment variables, pre-request and post-response hooks, and CI/CD automation via Bruno CLI. Licensed under the MIT License and available on Mac, Windows, and Linux with 43,000+ GitHub stars.