i3blocks analytics

analytics.php

#!/usr/bin/php
<?php
$view_id = "";
$token = "";
$key = "";

echo "Realtime: " . request($view_id, $token, $key);

function request($id, $token, $key)
{
    $ci = curl_init();

    $params = [
        "ids" => "ga:" . $id,
        "metrics" => "rt:activeUsers",
        "key" => $key
    ];
    curl_setopt_array($ci, [
        CURLOPT_HTTPHEADER => [
            "Host: content.googleapis.com",
            "User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:63.0) Gecko/20100101 Firefox/63.0",
            "Accept: */*",
            "Accept-Language: en-US,en;q=0.5",
            "Accept-Encoding: gzip, deflate, br",
            "X-ClientDetails: appVersion=5.0%20(X11)&platform=Linux%20x86_64&userAgent=Mozilla%2F5.0%20(X11%3B%20Ubuntu%3B%20Linux%20x86_64%3B%20rv%3A63.0)%20Gecko%2F20100101%20Firefox%2F63.0",
            "Authorization: Bearer " . $token,
            "X-Requested-With: XMLHttpRequest",
            "X-JavaScript-User-Agent: apix/3.0.0 google-api-javascript-client/1.1.0",
            "X-Origin: https://explorer.apis.google.com",
            "X-Referer: https://explorer.apis.google.com",
            "X-Goog-Encode-Response-If-Executable: base64",
            "Connection: keep-alive",
            "TE: Trailers",
        ],
        CURLOPT_URL => "https://content.googleapis.com/analytics/v3/data/realtime?" . http_build_query($params),
        CURLOPT_RETURNTRANSFER => true,
        CURLOPT_SSL_VERIFYHOST => false,
    ]);
    curl_setopt($ci, CURLOPT_ENCODING, "gzip");
    $resp = curl_exec($ci);
    $result = json_decode($resp, true);
    curl_close($ci);
    return $result['rows'][0][0];
}

exit(0);

You can fetch token and key from google's api explorer