diff --git a/proxy/db/capacityTracker.js b/proxy/db/capacityTracker.js
new file mode 100644
index 0000000..7f385a2
--- /dev/null
+++ b/proxy/db/capacityTracker.js
@@ -0,0 +1,59 @@
+// proxy/db/capacityTracker.js
+// ─────────────────────────────────────────────────────────────────────────────
+// MongoDB Capacity & Data Size Breakdown per Network Agent.
+// Measures logical document sizes per agent_uuid across all collections.
+// ─────────────────────────────────────────────────────────────────────────────
+
+const mongoose = require('mongoose');
+
+async function logCapacityStats(prefix = '[MongoDB]') {
+  try {
+    if (!mongoose.connection || !mongoose.connection.db) {
+      return;
+    }
+    const db = mongoose.connection.db;
+
+    const stats = await db.command({ dbStats: 1 });
+    const dataSizeMB = (stats.dataSize / (1024 * 1024)).toFixed(2);
+    const storageSizeMB = (stats.storageSize / (1024 * 1024)).toFixed(2);
+    console.log(`${prefix} Capacity Used: Data Size = ${dataSizeMB} MB, Storage Size = ${storageSizeMB} MB`);
+
+    const agentSizes = {};
+    const collections = await db.listCollections().toArray();
+    
+    for (const colInfo of collections) {
+      const colName = colInfo.name;
+      if (colName.startsWith('system.')) continue;
+      const col = db.collection(colName);
+
+      const sampleDoc = await col.findOne({ agent_uuid: { $ne: null } });
+      if (!sampleDoc) continue;
+
+      const pipeline = [
+        { $project: { agent_uuid: 1, docSize: { $bsonSize: "$$ROOT" } } },
+        { $group: { _id: "$agent_uuid", totalBytes: { $sum: "$docSize" } } }
+      ];
+      
+      const results = await col.aggregate(pipeline).toArray();
+      for (const res of results) {
+        const agent = res._id || 'Unknown';
+        agentSizes[agent] = (agentSizes[agent] || 0) + res.totalBytes;
+      }
+    }
+
+    const sortedAgents = Object.entries(agentSizes)
+      .map(([agent, bytes]) => ({ agent, sizeMB: parseFloat((bytes / (1024 * 1024)).toFixed(2)) }))
+      .sort((a, b) => b.sizeMB - a.sizeMB);
+
+    if (sortedAgents.length > 0) {
+      console.log(`${prefix} Data Size Breakdown per Agent:`);
+      for (const { agent, sizeMB } of sortedAgents) {
+        console.log(`  - ${agent}: ${sizeMB.toFixed(2)} MB`);
+      }
+    }
+  } catch (err) {
+    console.warn(`${prefix} Could not retrieve DB capacity breakdown:`, err.message);
+  }
+}
+
+module.exports = { logCapacityStats };
diff --git a/proxy/index.js b/proxy/index.js
index a143e29..13efa27 100644
--- a/proxy/index.js
+++ b/proxy/index.js
@@ -43,7 +43,7 @@ async function connectDB() {
         socketTimeoutMS:          30000,
       });
       console.log('[MongoDB] ✓ Connected successfully to', MONGODB_URI);
-      const { logCapacityStats } = require('../backend/db/capacityTracker');
+      const { logCapacityStats } = require('./db/capacityTracker');
       await logCapacityStats('[MongoDB]');
       return true;
     } catch (err) {
@@ -165,8 +165,8 @@ app.get('/agents', async (req, res) => {
     if (mongoose.connection.readyState !== 1) {
       return res.status(503).json({ ok: false, error: 'MongoDB not connected.' });
     }
-    const { DashboardSummary } = require('../backend/models/Schemas');
-    const agents = await DashboardSummary.distinct('agent_uuid');
+    const { Summary } = require('./models/Schemas');
+    const agents = await Summary.distinct('agent_uuid');
     res.json({ ok: true, data: agents });
   } catch (err) {
     res.status(500).json({ ok: false, error: err.message });
@@ -183,7 +183,7 @@ app.get('/domain-details', async (req, res) => {
   if (!domain) return res.status(400).json({ ok: false, error: 'domain is required' });
   
   try {
-    const { Flow, DeviceStat } = require('../backend/models/Schemas');
+    const { Flow, DeviceStat } = require('./models/Schemas');
     
     const filter = { domain: domain };
     if (agentUuid) {
diff --git a/proxy/scheduler.js b/proxy/scheduler.js
index dc6da44..e1f14b1 100644
--- a/proxy/scheduler.js
+++ b/proxy/scheduler.js
@@ -55,7 +55,7 @@ async function runCollection() {
     const now = Date.now();
     if (now - lastCapacityLogAt >= CAPACITY_LOG_INTERVAL_MS) {
       lastCapacityLogAt = now;
-      const { logCapacityStats } = require('../backend/db/capacityTracker');
+      const { logCapacityStats } = require('./db/capacityTracker');
       await logCapacityStats(`[PROXY] [MongoDB] Capacity Used after Run #${runCount}:`);
     }