Insomnium for Mac

Product summary

Insomnium is a free macOS utility that combines HTTP and GraphQL request functionality into a single, lightweight client. It’s built to simplify API testing and troubleshooting with a clean, approachable interface aimed at both developers and QA engineers.

Primary capabilities

• Inspect responses quickly with built-in viewers and formatted output
• Create and edit requests using a straightforward request builder
• Store and reuse variables to speed up repeated testing
• Add and tweak request headers to match various environments
• Automatically pretty-print JSON so results are easier to read
• Review past interactions via a searchable request history

How it improves workflow

The app reduces the friction of working with APIs by centralizing common tasks — composing queries, sending them, and examining results — in one place. By handling details such as header management and response formatting automatically, it lets you focus on diagnosing problems and validating endpoints rather than on repetitive setup.

Recommended alternative

If you want another free option, consider rq — a no-cost alternative that also provides HTTP and GraphQL support and a compact feature set suitable for everyday API work.