---
name: "CURLOPT_PROXY_CAPATH"
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_PROXY_CAPATH"
---

# CURLOPT\_PROXY\_CAPATH(3)

directory holding HTTPS proxy CA certificates

## NAME

CURLOPT\_PROXY\_CAPATH - directory holding HTTPS proxy CA certificates

## SYNOPSIS

```
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PROXY_CAPATH, char *capath);
```

## DESCRIPTION

Pass a char pointer to a null-terminated string naming a directory holding multiple CA certificates to verify the HTTPS proxy with. If libcurl is built against OpenSSL, the certificate directory must be prepared using the OpenSSL **c\_rehash** utility. This makes sense only when *[CURLOPT\_PROXY\_SSL\_VERIFYPEER(3)](/CURLOPT_PROXY_SSL_VERIFYPEER/3.md)* is enabled (which it is by default).

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

The default value for this can be figured out with *[CURLINFO\_CAPATH(3)](/CURLINFO_CAPATH/3.md)*.

## DEFAULT

NULL

## PROTOCOLS

Everything used over an HTTPS proxy

## EXAMPLE

```
int main(void)
{
  CURL *curl = curl_easy_init();
  if(curl) {
    CURLcode res;
    curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
    /* using an HTTPS proxy */
    curl_easy_setopt(curl, CURLOPT_PROXY, "https://localhost:443");
    curl_easy_setopt(curl, CURLOPT_PROXY_CAPATH, "/etc/cert-dir");
    res = curl_easy_perform(curl);
    curl_easy_cleanup(curl);
  }
}
```

## AVAILABILITY

Added in 7.52.0

This option is supported by the OpenSSL, GnuTLS, and mbedTLS (since 7.56.0) backends.

## RETURN VALUE

CURLE\_OK if supported; or an error such as:

CURLE\_NOT\_BUILT\_IN - Not supported by the SSL backend

CURLE\_UNKNOWN\_OPTION

CURLE\_OUT\_OF\_MEMORY

## SEE ALSO

[**CURLOPT\_CAINFO**(3)](/CURLOPT_CAINFO/3.md), [**CURLOPT\_DEBUGFUNCTION**(3)](/CURLOPT_DEBUGFUNCTION/3.md), [**CURLOPT\_PROXY\_CAINFO**(3)](/CURLOPT_PROXY_CAINFO/3.md), [**CURLOPT\_PROXY\_SSL\_VERIFYHOST**(3)](/CURLOPT_PROXY_SSL_VERIFYHOST/3.md), [**CURLOPT\_STDERR**(3)](/CURLOPT_STDERR/3.md)