diff --git a/apps_script/Code.gs b/apps_script/Code.gs
index 8c2acec..51eab3e 100644
--- a/apps_script/Code.gs
+++ b/apps_script/Code.gs
@@ -13,34 +13,323 @@
  *   4. Type: Web app  |  Execute as: Me  |  Who has access: Anyone
  *   5. Copy the Deployment ID into config.json as "script_id"
  *
- * CHANGE THE AUTH KEY BELOW TO YOUR OWN SECRET!
+ * TELEGRAM NOTIFICATIONS (optional):
+ *   1. Create a bot via @BotFather and copy the token into TELEGRAM_BOT_TOKEN
+ *   2. Get your chat ID and copy it into TELEGRAM_CHAT_ID
+ *   3. Set INSTANCE_NAME to identify this deployment in notifications
+ *   4. To enable periodic usage checks: Triggers → Add trigger →
+ *      Function: checkUsageAndNotify | Time-driven | Minutes timer |
+ *      Every N minutes (set to match USAGE_CHECK_INTERVAL_MINUTES)
+ *
+ * CHANGE ALL PLACEHOLDER VALUES BELOW BEFORE DEPLOYING!
  */
 
 const AUTH_KEY = "CHANGE_ME_TO_A_STRONG_SECRET";
+const INSTANCE_NAME = "MyRelay";
+
+const TELEGRAM_BOT_TOKEN = "YOUR_BOT_TOKEN_HERE";
+const TELEGRAM_CHAT_ID = "YOUR_CHAT_ID_HERE";
+const USAGE_CHECK_INTERVAL_MINUTES = 5;
+const DAILY_EXECUTION_LIMIT = 20000;
+const WARNING_THRESHOLDS = [0.5, 0.75, 0.9, 0.95, 0.99];
 
-// Keep browser capability headers (sec-ch-ua*, sec-fetch-*) intact.
-// Some modern apps, notably Google Meet, use them for browser gating.
 const SKIP_HEADERS = {
   host: 1, connection: 1, "content-length": 1,
   "transfer-encoding": 1, "proxy-connection": 1, "proxy-authorization": 1,
   "priority": 1, te: 1,
 };
 
+const USAGE_STORAGE_KEY = "daily_usage_data";
+
+function getUsageStore() {
+  const props = PropertiesService.getScriptProperties();
+  let usage = props.getProperty(USAGE_STORAGE_KEY);
+  const now = new Date();
+  const today = now.toDateString();
+
+  if (!usage) {
+    usage = {
+      date: today,
+      totalRequests: 0,
+      batchRequests: 0,
+      singleRequests: 0,
+      lastUpdated: now.toISOString(),
+      warningSent: [],
+    };
+    props.setProperty(USAGE_STORAGE_KEY, JSON.stringify(usage));
+    sendTelegramMessage(
+      "🚀 Domain Front Relay initialized\n" +
+      `Daily limit: ${DAILY_EXECUTION_LIMIT.toLocaleString()} requests\n` +
+      `Monitoring started for ${today}`
+    );
+  } else {
+    usage = JSON.parse(usage);
+    if (usage.date !== today) {
+      const previousDayTotal = usage.totalRequests;
+      sendTelegramMessage(
+        `📊 <b>Daily Reset - Previous Day Summary</b>\n\n` +
+        `📅 Date: ${usage.date}\n` +
+        `✅ Total Requests: <code>${previousDayTotal.toLocaleString()}</code>\n` +
+        `📈 Daily limit usage: <b>${((previousDayTotal / DAILY_EXECUTION_LIMIT) * 100).toFixed(1)}%</b>\n` +
+        `🔄 Resetting counter for ${today}`
+      );
+      usage = {
+        date: today,
+        totalRequests: 0,
+        batchRequests: 0,
+        singleRequests: 0,
+        lastUpdated: now.toISOString(),
+        warningSent: [],
+      };
+      props.setProperty(USAGE_STORAGE_KEY, JSON.stringify(usage));
+    }
+  }
+  return usage;
+}
+
+function updateUsage(type, count) {
+  count = count || 1;
+  const usage = getUsageStore();
+  usage.totalRequests += count;
+
+  if (type === "batch") {
+    usage.batchRequests += count;
+  } else if (type === "single") {
+    usage.singleRequests += count;
+  }
+
+  usage.lastUpdated = new Date().toISOString();
+  PropertiesService.getScriptProperties().setProperty(USAGE_STORAGE_KEY, JSON.stringify(usage));
+
+  if (usage.totalRequests > DAILY_EXECUTION_LIMIT) {
+    sendTelegramMessage(
+      `🚨 <b>CRITICAL: Daily execution limit EXCEEDED!</b>\n\n` +
+      `📊 Current: ${usage.totalRequests.toLocaleString()}\n` +
+      `⚠️ Limit: ${DAILY_EXECUTION_LIMIT.toLocaleString()}\n` +
+      `🔴 Exceeded by: ${(usage.totalRequests - DAILY_EXECUTION_LIMIT).toLocaleString()}\n\n` +
+      `❗ Immediate action required!`
+    );
+    return usage;
+  }
+
+  const percentage = usage.totalRequests / DAILY_EXECUTION_LIMIT;
+  for (var i = 0; i < WARNING_THRESHOLDS.length; i++) {
+    const threshold = WARNING_THRESHOLDS[i];
+    if (percentage >= threshold && usage.warningSent.indexOf(threshold) === -1) {
+      usage.warningSent.push(threshold);
+      PropertiesService.getScriptProperties().setProperty(USAGE_STORAGE_KEY, JSON.stringify(usage));
+
+      var emoji = "⚠️";
+      var severity = "WARNING";
+      if (threshold >= 0.95) {
+        emoji = "🚨";
+        severity = "CRITICAL";
+      } else if (threshold >= 0.9) {
+        emoji = "🔴";
+        severity = "HIGH";
+      } else if (threshold >= 0.75) {
+        emoji = "🟠";
+        severity = "MEDIUM";
+      }
+
+      const remaining = DAILY_EXECUTION_LIMIT - usage.totalRequests;
+      const estimatedTime = estimateTimeRemaining(remaining);
+
+      sendTelegramMessage(
+        `${emoji} <b>${severity} Usage Alert - ${Math.round(percentage * 100)}% of daily limit</b>\n\n` +
+        `📊 Current usage: ${usage.totalRequests.toLocaleString()} / ${DAILY_EXECUTION_LIMIT.toLocaleString()}\n` +
+        `📈 Percentage: <b>${(percentage * 100).toFixed(1)}%</b>\n` +
+        `✅ Remaining: ${remaining.toLocaleString()} requests\n` +
+        `⏱️ Estimated time remaining: ${estimatedTime}\n\n` +
+        `📋 Breakdown:\n` +
+        `• Single requests: ${usage.singleRequests.toLocaleString()}\n` +
+        `• Batch requests: ${usage.batchRequests.toLocaleString()}`
+      );
+    }
+  }
+
+  return usage;
+}
+
+function estimateTimeRemaining(remainingRequests) {
+  const usage = getUsageStore();
+  const now = new Date();
+  const startOfDay = new Date(now);
+  startOfDay.setHours(0, 0, 0, 0);
+
+  const hoursElapsed = (now - startOfDay) / (1000 * 60 * 60);
+  if (hoursElapsed < 0.1 || usage.totalRequests === 0) {
+    return "Unknown (insufficient data)";
+  }
+
+  const requestsPerHour = usage.totalRequests / hoursElapsed;
+  if (requestsPerHour === 0) return "Unknown";
+
+  const hoursRemaining = remainingRequests / requestsPerHour;
+  if (hoursRemaining < 1) {
+    return `${Math.round(hoursRemaining * 60)} minutes`;
+  }
+  return `${hoursRemaining.toFixed(1)} hours`;
+}
+
+function sendTelegramMessage(message) {
+  if (TELEGRAM_BOT_TOKEN === "YOUR_BOT_TOKEN_HERE") {
+    console.log("Telegram not configured — skipping notification");
+    return false;
+  }
+
+  const labeledMessage = `🏷️ <b>[${INSTANCE_NAME}]</b>\n${message}`;
+  const url = `https://api.telegram.org/bot${TELEGRAM_BOT_TOKEN}/sendMessage`;
+  const payload = {
+    chat_id: TELEGRAM_CHAT_ID,
+    text: labeledMessage,
+    parse_mode: "HTML",
+  };
+
+  try {
+    const options = {
+      method: "post",
+      contentType: "application/json",
+      payload: JSON.stringify(payload),
+      muteHttpExceptions: true,
+    };
+    const response = UrlFetchApp.fetch(url, options);
+    const result = JSON.parse(response.getContentText());
+    return result.ok;
+  } catch (err) {
+    console.error("Failed to send Telegram message:", err);
+    return false;
+  }
+}
+
+function sendPeriodicUpdate() {
+  const usage = getUsageStore();
+  const now = new Date();
+  const percentage = (usage.totalRequests / DAILY_EXECUTION_LIMIT) * 100;
+  const remaining = DAILY_EXECUTION_LIMIT - usage.totalRequests;
+
+  var statusEmoji = "✅";
+  if (percentage >= 90) statusEmoji = "🚨";
+  else if (percentage >= 75) statusEmoji = "🔴";
+  else if (percentage >= 50) statusEmoji = "🟠";
+  else if (percentage >= 25) statusEmoji = "🟡";
+
+  const message =
+    `⏰ Time: ${now.toLocaleString()}\n` +
+    `📊 Usage: ${usage.totalRequests.toLocaleString()} / ${DAILY_EXECUTION_LIMIT.toLocaleString()} (${percentage.toFixed(1)}%)\n` +
+    `${statusEmoji} Remaining: ${remaining.toLocaleString()} requests\n` +
+    `⏱️ Last update: ${new Date(usage.lastUpdated).toLocaleTimeString()}`;
+
+  if (percentage >= 90) {
+    sendTelegramMessage(`🚨 <b>URGENT: Approaching daily limit!</b>\n${message}`);
+  } else {
+    sendTelegramMessage(message);
+  }
+}
+
+function sendDailyUsageReport() {
+  const usage = getUsageStore();
+  const percentage = (usage.totalRequests / DAILY_EXECUTION_LIMIT) * 100;
+  const remaining = DAILY_EXECUTION_LIMIT - usage.totalRequests;
+
+  var statusIcon = "✅";
+  var statusText = "Within limit";
+  if (usage.totalRequests > DAILY_EXECUTION_LIMIT) {
+    statusIcon = "❌";
+    statusText = "LIMIT EXCEEDED";
+  } else if (percentage >= 90) {
+    statusIcon = "⚠️";
+    statusText = "Critical - Near limit";
+  } else if (percentage >= 75) {
+    statusIcon = "⚠️";
+    statusText = "Warning - High usage";
+  }
+
+  const message =
+    `📊 <b>Domain Front Relay - Daily Summary</b>\n\n` +
+    `📅 Date: ${usage.date}\n` +
+    `🕐 Last update: ${new Date(usage.lastUpdated).toLocaleString()}\n\n` +
+    `<b>Statistics:</b>\n` +
+    `• Total Requests: <code>${usage.totalRequests.toLocaleString()}</code>\n` +
+    `• Daily Limit: <code>${DAILY_EXECUTION_LIMIT.toLocaleString()}</code>\n` +
+    `• Usage: <b>${percentage.toFixed(1)}%</b>\n` +
+    `• Remaining: <code>${remaining.toLocaleString()}</code>\n\n` +
+    `<b>Breakdown:</b>\n` +
+    `• Single Mode: <code>${usage.singleRequests.toLocaleString()}</code>\n` +
+    `• Batch Mode: <code>${usage.batchRequests.toLocaleString()}</code>\n\n` +
+    `${statusIcon} Status: ${statusText}`;
+
+  return sendTelegramMessage(message);
+}
+
 function doPost(e) {
   try {
     var req = JSON.parse(e.postData.contents);
     if (req.k !== AUTH_KEY) return _json({ e: "unauthorized" });
 
-    // Batch mode: { k, q: [...] }
-    if (Array.isArray(req.q)) return _doBatch(req.q);
+    if (Array.isArray(req.q)) {
+      updateUsage("batch", req.q.length);
+      return _doBatch(req.q);
+    }
 
-    // Single mode
+    updateUsage("single");
     return _doSingle(req);
   } catch (err) {
+    sendTelegramMessage(`❌ <b>Error in doPost</b>\n\n${String(err)}`);
     return _json({ e: String(err) });
   }
 }
 
+function checkUsageAndNotify() {
+  const usage = getUsageStore();
+  const now = new Date();
+  const hour = now.getHours();
+  const minute = now.getMinutes();
+
+  if (hour === 23 && minute >= 55) {
+    sendDailyUsageReport();
+  } else {
+    sendPeriodicUpdate();
+  }
+}
+
+function resetDailyUsage() {
+  const props = PropertiesService.getScriptProperties();
+  const now = new Date();
+  const resetUsage = {
+    date: now.toDateString(),
+    totalRequests: 0,
+    batchRequests: 0,
+    singleRequests: 0,
+    lastUpdated: now.toISOString(),
+    warningSent: [],
+  };
+  props.setProperty(USAGE_STORAGE_KEY, JSON.stringify(resetUsage));
+  sendTelegramMessage(
+    `🔄 <b>Daily usage manually reset</b>\n` +
+    `New tracking started for ${now.toDateString()}\n` +
+    `Daily limit: ${DAILY_EXECUTION_LIMIT.toLocaleString()}`
+  );
+}
+
+function getCurrentUsageStats() {
+  const usage = getUsageStore();
+  const percentage = (usage.totalRequests / DAILY_EXECUTION_LIMIT) * 100;
+  const remaining = DAILY_EXECUTION_LIMIT - usage.totalRequests;
+
+  const stats =
+    `📈 <b>Current Usage Stats</b>\n\n` +
+    `📅 ${usage.date}\n` +
+    `✅ Total: ${usage.totalRequests.toLocaleString()} / ${DAILY_EXECUTION_LIMIT.toLocaleString()}\n` +
+    `📊 ${percentage.toFixed(1)}% used\n` +
+    `💚 Remaining: ${remaining.toLocaleString()}\n` +
+    `🔄 Single: ${usage.singleRequests.toLocaleString()}\n` +
+    `📦 Batch: ${usage.batchRequests.toLocaleString()}`;
+
+  sendTelegramMessage(stats);
+  return usage;
+}
+
 function _doSingle(req) {
   if (!req.u || typeof req.u !== "string" || !req.u.match(/^https?:\/\//i)) {
     return _json({ e: "bad url" });
@@ -138,4 +427,4 @@ function _json(obj) {
   return ContentService.createTextOutput(JSON.stringify(obj)).setMimeType(
     ContentService.MimeType.JSON
   );
-}
+}
\ No newline at end of file