---
name: "CURLOPT_VERBOSE"
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_VERBOSE"
---

# CURLOPT\_VERBOSE(3)

verbose mode

## NAME

CURLOPT\_VERBOSE - verbose mode

## SYNOPSIS

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

## DESCRIPTION

Set the *onoff* parameter to 1 to make the library display a lot of verbose information about its operations on this *handle*. Useful for libcurl and/or protocol debugging and understanding. The verbose information is sent to stderr, or the stream set with *[CURLOPT\_STDERR(3)](/CURLOPT_STDERR/3.md)*.

You hardly ever want this enabled in production use, you almost always want this used when you debug/report problems.

To also get all the protocol data sent and received, consider using the *[CURLOPT\_DEBUGFUNCTION(3)](/CURLOPT_DEBUGFUNCTION/3.md)*.

**WARNING:** this may show sensitive contents from headers and data.

## DEFAULT

0, meaning disabled.

## 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");
    /* ask libcurl to show us the verbose output */
    curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);
    /* Perform the request */
    result = curl_easy_perform(curl);
    curl_easy_cleanup(curl);
  }
}
```

## AVAILABILITY

Added in curl 7.1

## 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\_DEBUGFUNCTION**(3)](/CURLOPT_DEBUGFUNCTION/3.md), [**CURLOPT\_ERRORBUFFER**(3)](/CURLOPT_ERRORBUFFER/3.md), [**CURLOPT\_STDERR**(3)](/CURLOPT_STDERR/3.md), [**curl\_global\_trace**(3)](/curl_global_trace/3.md)