What is a CLI (command line interface)?

The Command Line Interface (CLI) is a text-based tool for interacting with computers, offering a faster and more flexible alternative to graphical user interfaces (GUI). While initially perceived as a tool for developers, the CLI is accessible to non-technical users and can handle repetitive tasks, control remote servers, and work with technical tools. With practice, users can automate tasks and run commands that would otherwise require multiple steps in a GUI. This guide also compares CLI with Model Context Protocol (MCP) and Software Development Kit (SDK), highlighting how each tool places different users or systems in control. The Zapier CLI is discussed as a means to execute actions across thousands of apps without leaving the terminal, offering efficiency in integrating and automating workflows. Understanding and using basic terminal commands, JSON for data structuring, and installing necessary software like Node.js and npm are essential for leveraging the CLI's capabilities, which extend to scripting, scheduling tasks, and debugging workflows.