Goo.gl URL Shortener перестал работать (php / curl)

По какой-то причине мой сценарий перестал работать сегодня. Когда я смотрю в панели управления API, у меня остается 100% использования. Есть идеи? Они изменили способ аутентификации?

function url_small($url)
{
//This is the URL you want to shorten
$longUrl = $url;
$apiKey = '#####HIDDEN######';
//Get API key from : http://code.google.com/apis/console/

$postData = array('longUrl' => $longUrl, 'key' => $apiKey);
$jsonData = json_encode($postData);

$curlObj = curl_init();

curl_setopt($curlObj, CURLOPT_URL, 'https://www.googleapis.com/urlshortener/v1/url');
curl_setopt($curlObj, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($curlObj, CURLOPT_SSL_VERIFYPEER, 0);
curl_setopt($curlObj, CURLOPT_HEADER, 0);
curl_setopt($curlObj, CURLOPT_HTTPHEADER, array('Content-type:application/json'));
curl_setopt($curlObj, CURLOPT_POST, 1);
curl_setopt($curlObj, CURLOPT_POSTFIELDS, $jsonData);

$response = curl_exec($curlObj);

//change the response json string to object
$json = json_decode($response);
curl_close($curlObj);

return $json->id;
}

отклик

stdClass Object
(
[error] => stdClass Object
(
[errors] => Array
(
[0] => stdClass Object
(
[domain] => usageLimits
[reason] => dailyLimitExceededUnreg
[message] => Daily Limit for Unauthenticated Use Exceeded. Continued use requires signup.
[extendedHelp] => https://code.google.com/apis/console
)

)

[code] => 403
[message] => Daily Limit for Unauthenticated Use Exceeded. Continued use requires signup.
)

)