---
name: "CURLOPT_PROXYUSERNAME"
section: "3"
platform: "macos"
package: "curl"
version: "166.0.0.0.1"
release: "macOS 26.5"
platforms: ["linux", "macos"]
url: "https://new.carta.tech/CURLOPT_PROXYUSERNAME"
---

# CURLOPT\_PROXYUSERNAME(3)

user name to use for proxy authentication

## NAME

CURLOPT\_PROXYUSERNAME - user name 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 user name to use for the transfer.

*[CURLOPT\_PROXYUSERNAME(3)](/CURLOPT_PROXYUSERNAME/3.md)* sets the user name to be used in protocol authentication with the proxy.

To specify the proxy password use the *[CURLOPT\_PROXYPASSWORD(3)](/CURLOPT_PROXYPASSWORD/3.md)*.

The application does not have to keep the string around after setting this option.

## DEFAULT

blank

## PROTOCOLS

Most

## EXAMPLE

```
int main(void)
{
  CURL *curl = curl_easy_init();
  if(curl) {
    CURLcode res;
    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");
    res = curl_easy_perform(curl);
    curl_easy_cleanup(curl);
  }
}
```

## AVAILABILITY

Added in 7.19.1

## RETURN VALUE

Returns CURLE\_OK if the option is supported, CURLE\_UNKNOWN\_OPTION if not, or CURLE\_OUT\_OF\_MEMORY if there was insufficient heap space.

## SEE ALSO

[**CURLOPT\_HTTPAUTH**(3)](/CURLOPT_HTTPAUTH/3.md), [**CURLOPT\_PROXYAUTH**(3)](/CURLOPT_PROXYAUTH/3.md), [**CURLOPT\_PROXYPASSWORD**(3)](/CURLOPT_PROXYPASSWORD/3.md), [**CURLOPT\_USERNAME**(3)](/CURLOPT_USERNAME/3.md)