master-server/deps/curl/docs/cmdline-opts/user-agent.md

c	SPDX-License-Identifier	Short	Long	Arg	Help	Protocols	Category	Added	Multi	See-also	Example
Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.	curl	A	user-agent	<name>	Send User-Agent <name> to server	HTTP	important http	4.5.1	single	header proxy-header	-A "Agent 007" $URL

--user-agent

Specify the User-Agent string to send to the HTTP server. To encode blanks in the string, surround the string with single quote marks. This header can also be set with the --header or the --proxy-header options.

If you give an empty argument to --user-agent (""), it removes the header completely from the request. If you prefer a blank header, you can set it to a single space (" ").