Client URL - Transfer Data from or to a Server
curl is a command-line tool for transferring data using various network protocols including HTTP, HTTPS, FTP, and more. It's one of the most versatile tools for making web requests, testing APIs, downloading files, and debugging network connections.
Developers use curl extensively for API testing, web scraping, file transfers, and automation scripts. It supports authentication, cookies, headers, POST data, and virtually every HTTP feature you can think of. Think of it as a browser without the graphical interface.
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Test REST APIs and web services from the command line.
Download files from web servers and FTP sites.
Inspect HTTP headers and server responses.
Submit form data and JSON payloads to APIs.
curl https://example.com Fetch a webpage and display its HTML content.
curl -I https://example.com Show only HTTP response headers (HEAD request).
curl -o file.html https://example.com Download and save content to a file.
curl -X POST https://api.example.com/data Send a POST request to an API endpoint.
curl -H "Authorization: Bearer token" https://api.example.com Send request with custom HTTP header (e.g., authentication).
curl -d '{"key":"value"}' -H "Content-Type: application/json" https://api.example.com POST JSON data to an API.
curl -v https://example.com Verbose mode - show detailed request/response information.
curl -L https://example.com Follow redirects automatically.
Practice using the curl command in the terminal below. Try typing curl https://example.com or curl -I https://api.github.com