CURLOPT_PROXYUSERNAME(3) Library Functions Manual CURLOPT_PROXYUSERNAME(3)
NAME
CURLOPT_PROXYUSERNAME - username to use for proxy authentication
SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PROXYUSERNAME,
char *username);
DESCRIPTION
Pass a char pointer as parameter, which should be pointing to the
null-terminated username to use for the transfer.
CURLOPT_PROXYUSERNAME(3) sets the username to be used in protocol
authentication with the proxy.
To specify the proxy password use the CURLOPT_PROXYPASSWORD(3).
The application does not have to keep the string around after setting
this option.
DEFAULT
blank
PROTOCOLS
This functionality affects all supported protocols
EXAMPLE
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode result;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/foo.bin");
curl_easy_setopt(curl, CURLOPT_PROXY, "http://localhost:8080");
curl_easy_setopt(curl, CURLOPT_PROXYUSERNAME, "mrsmith");
curl_easy_setopt(curl, CURLOPT_PROXYPASSWORD, "qwerty");
result = curl_easy_perform(curl);
curl_easy_cleanup(curl);
}
}
AVAILABILITY
Added in curl 7.19.1
RETURN VALUE
curl_easy_setopt(3) returns a CURLcode indicating success or error.
CURLE_OK (0) means everything was OK, non-zero means an error occurred,
see libcurl-errors(3).
SEE ALSO
CURLOPT_HTTPAUTH(3), CURLOPT_PROXYAUTH(3), CURLOPT_PROXYPASSWORD(3),
CURLOPT_USERNAME(3)
libcurl 2026-03-23 CURLOPT_PROXYUSERNAME(3)
curl 8.19.0 - Generated Mon Mar 30 18:06:37 CDT 2026