Milkman

Milkman is a JavaFX‑based workbench for creating and executing requests, offering an alternative to Electron‑driven tools. Its core manages workspaces, environments, collections, and request aspects, while functionality is added through a plugin system. Plugins can define new request types, editors, importers, and other extensions, allowing the application to handle HTTP/REST, gRPC, GraphQL, database queries, and more.

The bundled HTTP request plugin supports crafting and running REST calls with JSON highlighting, proxy configuration, and server‑sent events, and it can import collections from Postman or Insomnia. Additional plugins provide gRPC support with server reflection and streaming, as well as a test runner that executes multiple requests as a scenario. A command‑line interface enables request editing and execution from a terminal, and a Slack command lets users share requests via privatebin URLs.

Milkman runs natively on macOS and can be installed through Homebrew or Chocolatey, with plugins distributed as separate archives or bundled in a single package. Its JavaFX foundation makes it lightweight and skinnable via CSS, and the extensible architecture permits users to tailor the workbench to a particular protocols or workflows.