Sample Code

    // URL parameter from Notification API. (or copy from your project list page.)
    $projectID=$_GET['projectId'];
    // Authorization
    $auth="YOURAPIKEY";
    // Header
    $options = array(
        'http' => array(
        'method'  => 'GET',
        'header'=>  "Content-Type: application/json\r\n"."Accept: application/json\r\n"."Authorization: Basic ".base64_encode($auth)."\r\n"
        )
    );
    $url = 'https://cloud.measuresquare.com/api/projects/'.$projectID;
    $context  = stream_context_create( $options );
    $result = file_get_contents( $url, false, $context );
    // it is more better to check the HTTP status code here
    $response = json_decode( $result );
    // do your other work next
                

    string url = "https://cloud.measuresquare.com/api/projects/" + ProjectIdParameter;
    using (HttpClient client = new HttpClient())
    {
        client.DefaultRequestHeaders.Accept.Clear();
        client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
        string parameter = Convert.ToBase64String(Encoding.UTF8.GetBytes(string.Format("{0}", YOURAPIKEY)));
        client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Basic", parameter);
        using (HttpRequestMessage request = new HttpRequestMessage(HttpMethod.Get, url))
        {
            using (HttpResponseMessage response = await client.SendAsync(request))
            {
                if (response.StatusCode != HttpStatusCode.OK)
                    return default(T);
                // read the data and convert to your data type
                T result = await response.Content.ReadAsAsync();
                // return data, or do what you want to do
            }
        }
    }
                

BOOL B2BWebServices::ExecuteM2URLGETSSL(CString url, CString apiKey)
{
    char *versionStr = curl_version();
    struct curl_slist *list = NULL;
    CURL* curl = curl_easy_init();
    if(curl)
    {
        sprintf(gBuf, "%s", url);
        // Tell libcurl the URL
        curl_easy_setopt(curl,CURLOPT_URL, gBuf);
        // Tell libcurl what function to call when it has data
        curl_easy_setopt(curl,CURLOPT_WRITEFUNCTION,Handle_dataXML);
        // Setup Header for M2 call
        list = curl_slist_append(list, "Content-Type: application/xml");
        list = curl_slist_append(list, "Accept: application/xml");
        curl_easy_setopt(curl, CURLOPT_HTTPHEADER, list);
        // User Name is API Key
        CURLcode retVal = curl_easy_setopt(curl, CURLOPT_USERNAME, apiKey); 
        // Verify Host
        CURLcode retVal2 = curl_easy_setopt(curl,CURLOPT_SSL_VERIFYHOST,0L);
        // Do it!
        CURLcode res = curl_easy_perform(curl);
        //get the http codes
        long http_code = 0;
        curl_easy_getinfo (curl, CURLINFO_RESPONSE_CODE, &http_code);
        // if (http_code == 200 && res != CURLE_ABORTED_BY_CALLBACK)
        curl_easy_cleanup(curl);
    }
    else
        return FALSE;
    return TRUE;
}