CURLOPT_USERAGENT − set HTTP user-agent header
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_USERAGENT, char *ua);
Pass a pointer to a null-terminated string as parameter. It will be used to set the User-Agent: header in the HTTP request sent to the remote server. This can be used to fool servers or scripts. You can also set any custom header with CURLOPT_HTTPHEADER(3).
The application does not have to keep the string around after setting this option.
NULL, no User-Agent: header is used by default.
CURL *curl =
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
curl_easy_setopt(curl, CURLOPT_USERAGENT, "Dark Secret Ninja/1.0");
As long as HTTP is supported
Returns CURLE_OK if HTTP is supported, CURLE_UNKNOWN_OPTION if not, or CURLE_OUT_OF_MEMORY if there was insufficient heap space.