Where do i find my extension id?

[BarryCarlyon]

@Andy

    curl_setopt($ch, CURLOPT_HTTPHEADER, array(
        'Client-ID: XXX',
        'Authorization: Bearer ' . $accessToken,
    ));

So you are passing the clientID as XXX?

Shouldn’t it be

    curl_setopt($ch, CURLOPT_HTTPHEADER, array(
        'Client-ID: ' . $extensionID,
        'Authorization: Bearer ' . $accessToken,
    ));

Also note that clientID’s are essentially public so you don’t need to worry about redacting them

And $clientId and $extensionID are the same value?