---
name: "CURLOPT_PROXYTYPE"
section: "3"
platform: "linux"
package: "curl"
version: "8.23.0-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux", "macos"]
url: "https://new.carta.tech/CURLOPT_PROXYTYPE"
---

# CURLOPT\_PROXYTYPE(3)

proxy protocol type

## NAME

CURLOPT\_PROXYTYPE - proxy protocol type

## SYNOPSIS

```
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PROXYTYPE, long type);
```

## DESCRIPTION

Pass one of the values below to set the type of the proxy.

- CURLPROXY\_HTTP

  HTTP Proxy. Default.

- CURLPROXY\_HTTPS

  HTTPS Proxy using HTTP/1. (Added in 7.52.0 for OpenSSL and GnuTLS. Since 7.87.0, it also works for mbedTLS, Rustls, Schannel and wolfSSL.)

- CURLPROXY\_HTTPS2

  HTTPS Proxy and attempt to speak HTTP/2 over it. (Added in 8.1.0)

- CURLPROXY\_HTTPS3

  HTTPS Proxy and attempt to speak HTTP/3 over it. (Added in 8.21.0) This feature is experimental and requires a build with HTTP/3 proxy support enabled.

- CURLPROXY\_HTTP\_1\_0

  HTTP 1.0 Proxy. This is similar to CURLPROXY\_HTTP except it uses HTTP/1.0 for any CONNECT tunneling. It does not change the HTTP version of the actual HTTP requests, controlled by *[CURLOPT\_HTTP\_VERSION(3)](/CURLOPT_HTTP_VERSION/3.md)*.

- CURLPROXY\_SOCKS4

  SOCKS4 Proxy.

- CURLPROXY\_SOCKS4A

  SOCKS4a Proxy. Proxy resolves URL hostname.

- CURLPROXY\_SOCKS5

  SOCKS5 Proxy.

- CURLPROXY\_SOCKS5\_HOSTNAME

  SOCKS5 Proxy. Proxy resolves URL hostname.

Often it is more convenient to specify the proxy type with the scheme part of the *[CURLOPT\_PROXY(3)](/CURLOPT_PROXY/3.md)* string.

## DEFAULT

CURLPROXY\_HTTP

## PROTOCOLS

This functionality affects all supported protocols

## EXAMPLE

```
int main(void)
{
  CURL *curl = curl_easy_init();
  if(curl) {
    CURLcode result;
    curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
    curl_easy_setopt(curl, CURLOPT_PROXY, "local.example.com:1080");
    /* set the proxy type */
    curl_easy_setopt(curl, CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5);
    result = curl_easy_perform(curl);
    curl_easy_cleanup(curl);
  }
}
```

## HISTORY

**CURLPROXY\_**\* enums became *long* types in 8.16.0, prior to this version a *long* cast was necessary when passed to *[curl\_easy\_setopt(3)](/curl_easy_setopt/3.md)*.

## AVAILABILITY

Added in curl 7.10

## RETURN VALUE

*[curl\_easy\_setopt(3)](/curl_easy_setopt/3.md)* returns a CURLcode indicating success or error.

CURLE\_OK (0) means everything was OK, non-zero means an error occurred, see *[libcurl-errors(3)](/libcurl-errors/3.md)*.

## SEE ALSO

[**CURLOPT\_PROXY**(3)](/CURLOPT_PROXY/3.md), [**CURLOPT\_PROXYPORT**(3)](/CURLOPT_PROXYPORT/3.md)