CURLOPT_NOPROXY(3)

🎀 NAME 🎀

okay so this is the libcurl Library Functions Manual page for CURLOPT_NOPROXY — the setting that disables proxy use for specific hosts, bestie. 💅✨

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✨ SYNOPSIS ✨

#include <curl/curl.h>

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_NOPROXY, char *noproxy);

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🦋 DESCRIPTION 🦋

Pass a pointer to a null-terminated string, bestie. The string is a comma separated list of hostnames that do not require a proxy to get reached, even if one is specified. 🫶

The only wildcard available is a single * character — it matches all hosts and effectively disables the proxy. Each name in this list is matched as either a domain which contains the hostname, or the hostname itself. For example, "ample.com" would match ample.com, ample.com:80, and www.ample.com, but not www.example.com or ample.com.org. no cap, that matching is very specific 👑

🚨 bestie, clock this: setting the noproxy string to "" (an empty string) explicitly enables the proxy for all hostnames, even if there is an environment variable set for it. That is the opposite of noproxy energy, okay? 💀

Enter IPv6 numerical addresses in the list of hostnames without enclosing brackets:

"example.com,::1,localhost"

Since 7.86.0, IP addresses specified to this option can be provided using CIDR notation: an appended slash and number specifies the number of "network bits" out of the address to use in the comparison. For example, "192.168.0.0/16" would match all addresses starting with "192.168". slay 💅

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

Using this option multiple times makes the last set string override the previous ones. Set the option to NULL to disable its use again.

🌈 Environment variables 🌈

If there is an environment variable called no_proxy (or NO_PROXY), it is used if the CURLOPT_NOPROXY(3) option is not set. It works exactly the same way. 💖

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🍓 DEFAULT 🍓

NULL

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🔥 PROTOCOLS 🔥

This functionality affects all supported protocols.

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💖 EXAMPLE 💖

okay bestie, here's the whole little C moment, copy it exactly and go off:

int main(void)
{
  CURL *curl = curl_easy_init();
  if(curl) {
    /* accept various URLs */
    curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
    /* use this proxy */
    curl_easy_setopt(curl, CURLOPT_PROXY, "http://proxy.example:80");
    /* ... but make sure this host name is not proxied */
    curl_easy_setopt(curl, CURLOPT_NOPROXY, "www.example.com");
    curl_easy_perform(curl);
  }
}

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🌸 AVAILABILITY 🌸

Added in curl 7.19.4 ✨

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⭐ 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). 🫶

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👑 SEE ALSO 👑

• CURLOPT_PROXY(3)
• CURLOPT_PROXYAUTH(3)
• CURLOPT_PROXYTYPE(3)

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💜 that's the whole page, bestie — source/version: libcurl · date: 2026-10-12 · page: CURLOPT_NOPROXY(3) — mwah, go forth and proxy correctly! 🫶✨