Insomnia is a free cross-platform desktop application that takes the pain out of interacting with HTTP-based APIs. Insomnia combines an easy-to-use interface with advanced functionality like authentication helpers, code generation, and environment variables.

HTTPie—aitch-tee-tee-pie—is a command line HTTP client with an intuitive UI, JSON support, syntax highlighting, wget-like downloads, plugins, and more.

HTTPie consists of a single http command designed for painless debugging and interaction with HTTP servers, RESTful APIs, and web services:

• Sensible defaults
• Expressive and intuitive command syntax
• Colorized and formatted terminal output
• Built-in JSON support
• Persistent sessions
• Forms and file uploads
• HTTPS, proxies, and authentication support
• Support for arbitrary request data and headers
• Wget-like downloads
• Extensions
• Linux, macOS, and Windows support