cURL

cURL is the command-line tool and library (libcurl) for transferring data with URL syntax, providing a robust engine for client-side network communication.

cURL, short for 'Client URL,' is a critical, highly portable software project: it consists of the command-line tool `curl` and the powerful `libcurl` library. This library is the internet transfer engine for over twenty billion installations, powering countless devices from cars to medical equipment. It supports a massive protocol list, including HTTP/1, HTTP/2, HTTP/3, HTTPS, FTP, FTPS, SCP, SFTP, and MQTT. Developers use the `curl` tool daily for testing APIs (e.g., with `GET` or `POST` requests), debugging network issues, and automating data transfers via scripts.

https://curl.se