---
c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
SPDX-License-Identifier: curl
Title: CURLOPT_NOPROXY
Section: 3
Source: libcurl
Protocol:
  - All
See-also:
  - CURLOPT_PROXY (3)
  - CURLOPT_PROXYAUTH (3)
  - CURLOPT_PROXYTYPE (3)
Added-in: 7.19.4
---

# NAME

CURLOPT_NOPROXY - disable proxy use for specific hosts

# SYNOPSIS

~~~c
#include <curl/curl.h>

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

# DESCRIPTION

Pass a pointer to a null-terminated string. The string consists of 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,
which 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.

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.

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

    "example.com,::1,localhost"

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".

To use international hostnames in this list, add the punycode version of the
hostname.

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 it 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.

# DEFAULT

NULL

# %PROTOCOLS%

# EXAMPLE

~~~c
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 hostname is not proxied */
    curl_easy_setopt(curl, CURLOPT_NOPROXY, "www.example.com");
    curl_easy_perform(curl);
  }
}
~~~

# HISTORY

CIDR format support was added in 7.86.0.

# %AVAILABILITY%

# 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).
