If you've spent any time building or working with APIs, you've probably realized that the terminal is still one of the fastest places to get things done.
While graphical API clients have become more powerful over the years, I still find myself opening a terminal whenever I need to quickly test an endpoint, validate an OpenAPI specification, automate repetitive tasks, or integrate API workflows into a CI/CD pipeline. CLI tools are lightweight, scriptable, and fit naturally into modern development workflows.
The interesting part is that API command-line tools have evolved far beyond simply sending HTTP requests. Today, some tools help lint API specifications, others compare schema changes, automate testing, generate documentation, or even manage the entire API lifecycle directly from the terminal.
In this article, I'm sharing ten API CLI tools that I think every developer should know in 2026. Some are industry classics that have stood the test of time, while others solve newer challenges around API automation and collaboration. Whether you're a backend developer, DevOps engineer, QA engineer, or simply someone who works with APIs every day, there's something here that can improve your workflow.
