Cost / License
- Free
- Open Source (BSD-3-Clause)
Application type
Platforms
- Mac
- Linux
- Windows
- FreeBSD
- NetBSD
- OpenBSD
- DragonFly BSD
Chapar is described as 'Native API testing tool, supporting HTTP and gRPC protocols, workspaces, environments, request management, various content types, and dark mode' and is a API Client in the development category. There are more than 50 alternatives to Chapar for a variety of platforms, including Mac, Windows, Linux, Web-based and Flathub apps. The best Chapar alternative is Bruno, which is both free and Open Source. Other great apps like Chapar are Postman, Insomnia REST Client, Yaak and Hoppscotch.

Thunder Client is a hand-crafted lightweight Http Client extension for Visual Studio Code. No separate download needed, Just install the extension from VS Code marketplace.


Native desktop app for Windows offers high-performance REST and HTTP API testing, low memory and CPU use, custom methods, portable version, proxy support, multiple environments, code generation, multilingual interface, and import/export in light or dark themes.




Kreya is a GUI client for gRPC, REST and WebSocket APIs with innovative features for environments, authorizations and more.




API Tester is the first mobile app to test any type of API on the go. Test REST, GraphQL, WebSocket, SOAP, JSON RPC, XML, HTTP, and HTTPS APIs completely for free, on iOS or Android.








Milkman is a JavaFx-based workbench for crafting requests / responses. It is not limited to e.g. http (or more specifically rest) requests but can be extended in any imaginable way. It is optimized for fast startup and efficient workflow.


Used httpyac CLI tool underneath, which helps you execute _.http and _.rest files. This can be used to quickly execute a single *.http file, but also to execute all files in a folder. httpyac supports HTTP, Rest, GraphQL, WebSocket und gRPC...


This is a tool to manually explore and test HTTP REST webservices. Runs queries from a plain-text query sheet, displays results as a pretty-printed XML, JSON and even images.

A cross-platform HTTP client desktop application for testing HTTP and REST APIs, WebSocket, GraphQL (including subscriptions) and gRPC endpoints.


