CURLOPT_PROXYUSERNAME(3)

okay so bestie, welcome to the libcurl manual page for CURLOPT_PROXYUSERNAME(3) — yes, the whole page is about the username to use for proxy authentication, and it's lowkey iconic. 💅

✨ NAME ✨

CURLOPT_PROXYUSERNAME — username to use for proxy authentication. that's the vibe. 🎀

🦋 SYNOPSIS 🦋

#include <curl/curl.h>

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PROXYUSERNAME,
                          char *username);

💖 DESCRIPTION 💖

Pass a char * pointer as the parameter, and it should be pointing to the null-terminated username to use for the transfer. literally just give it the username string, bestie. ✨

CURLOPT_PROXYUSERNAME(3) sets the username to be used in protocol authentication with the proxy. that's the whole assignment. 🫶

To specify the proxy password, use CURLOPT_PROXYPASSWORD(3). password goes there, username goes here — keep the pair cute and separate. 💖

The application does not have to keep the string around after setting this option. so you don't gotta babysit that string after you set it. 😌

🎀 DEFAULT 🎀

blank. that's the default. 🎀

🌈 PROTOCOLS 🌈

This functionality affects all supported protocols. all of them. no cap. 🌈

🍓 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. that's when this icon was born, bestie. ⭐

🔥 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). if it's non-zero, it's giving error — go check that page. 🔥

👑 SEE ALSO 👑

• CURLOPT_HTTPAUTH(3)
• CURLOPT_PROXYAUTH(3)
• CURLOPT_PROXYPASSWORD(3)
• CURLOPT_USERNAME(3)

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mwah 💋 — libcurl manual page, dated 2026-10-12, all about CURLOPT_PROXYUSERNAME(3).