.\" generated by cd2nroff 0.1 from CURLOPT_PROXYAUTH.md
.TH CURLOPT_PROXYAUTH 3 "2025-11-13" libcurl
.SH NAME
CURLOPT_PROXYAUTH \- HTTP proxy authentication methods
.SH SYNOPSIS
.nf
#include <curl/curl.h>

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PROXYAUTH, long bitmask);
.fi
.SH DESCRIPTION
Pass a long as parameter, which is set to a bitmask, to tell libcurl which
HTTP authentication method(s) you want it to use for your proxy
authentication. If more than one bit is set, libcurl first queries the site to
see what authentication methods it supports and then it picks the best one you
allow it to use. For some methods, this induces an extra network round\-trip.
Set the actual name and password with the \fICURLOPT_PROXYUSERPWD(3)\fP
option.

The bitmask can be constructed by the bits listed and described in the
\fICURLOPT_HTTPAUTH(3)\fP man page.
.SH DEFAULT
CURLAUTH_BASIC
.SH PROTOCOLS
This functionality affects all supported protocols
.SH EXAMPLE
.nf
int main(void)
{
  CURL *curl = curl_easy_init();
  if(curl) {
    CURLcode ret;
    curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
    /* use this proxy */
    curl_easy_setopt(curl, CURLOPT_PROXY, "http://local.example.com:1080");
    /* allow whatever auth the proxy speaks */
    curl_easy_setopt(curl, CURLOPT_PROXYAUTH, CURLAUTH_ANY);
    /* set the proxy credentials */
    curl_easy_setopt(curl, CURLOPT_PROXYUSERPWD, "james:007");
    ret = curl_easy_perform(curl);
    curl_easy_cleanup(curl);
  }
}
.fi
.SH HISTORY
\fBCURLAUTH_\fP* macros became \fIlong\fP types in 7.26.0, prior to this version
a \fIlong\fP cast was necessary when passed to \fIcurl_easy_setopt(3)\fP.
.SH AVAILABILITY
Added in curl 7.10.7
.SH RETURN VALUE
\fIcurl_easy_setopt(3)\fP returns a CURLcode indicating success or error.

CURLE_OK (0) means everything was OK, non\-zero means an error occurred, see
\fIlibcurl\-errors(3)\fP.
.SH SEE ALSO
.BR CURLOPT_HTTPAUTH (3),
.BR CURLOPT_PROXY (3),
.BR CURLOPT_PROXYPORT (3),
.BR CURLOPT_PROXYTYPE (3),
.BR CURLOPT_PROXYUSERPWD (3)