When asked to use HTTP/3, curl issues a separate attempt to use older HTTP versions with a slight delay, so if the HTTP/3 transfer fails or is slow, curl still tries to proceed with an older …

Jul 11, 2025 · curl is a command-line utility for transferring data to or from a server, employing a range of internet protocols such as HTTP, HTTPS, FTP, SCP, and SFTP. Whether you want …

curl is free and open source software and exists thanks to thousands of contributors and our awesome sponsors. The curl project follows well established open source best practices.

curl is a tool for transferring data from or to a server using URLs. It supports these protocols: DICT, FILE, FTP, FTPS, GOPHER, GOPHERS, HTTP, HTTPS, IMAP, IMAPS, LDAP, …

Command line options pass on information to curl about how you want it to behave. Like you can ask curl to switch on verbose mode with the -v option: -v is here used as a "short option". You …

Mar 12, 2025 · This curl cheat sheet contains commands and examples of common tasks that can be performed with curl. Covering a wide range of curl options, tricks, and tips.

curl will return an error message if the remote server is using a self-signed certificate, or if the remote server certificate is not signed by a CA listed in the CA cert file. -k or --insecure option …

curl is a command-line tool for transferring data from or to a server using URLs. It supports these protocols: DICT, FILE, FTP, FTPS, GOPHER, GOPHERS, HTTP, HTTPS, IMAP, IMAPS, …

Sep 13, 2023 · Use curl to interact with websites directly from your command line. This cheat sheet will guide you through its most common commands.

This is a detailed and totally free book, available online (and as a PDF as a link from there) that explains everything there is to know about curl, libcurl and the associated project.