cURL, a longstanding command line HTTP client, is widely utilized by developers and administrators for web development tasks such as testing APIs, fetching web pages, and file transfers. It supports HTTP requests like GET, POST, PUT, and DELETE, crucial for interacting with REST APIs, and is pre-installed on major operating systems like Linux, macOS, and Windows. Beyond basic usage, cURL can be paired with Web Unlocker to enhance capabilities with proxy features, including geotargeting and CAPTCHA solving. The article suggests alternatives and complements to cURL, such as GUI tools like Postman and Insomnia, and command line utilities like HTTPie and wget, while emphasizing cURL's enduring relevance in the realm of HTTP clients.