curl/docs/cmdline-opts/user-agent.md
2026-05-01 10:27:17 +02:00

802 B

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 or double 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 (" ").

By default, curl uses curl/VERSION, such as User-Agent: curl/%VERSION.