diff --git a/server/server.js b/server/server.js
index 7319ed2..238a88f 100644
--- a/server/server.js
+++ b/server/server.js
@@ -1841,6 +1841,73 @@ app.post('/api/turtle/:id/refresh-inventory', async (req, res) => {
   }
 });
 
+// ========== Cross-Project Integration API ==========
+// These endpoints allow the Inventory Manager system to query turtle state
+
+const INVENTORY_SERVER_URL = process.env.INVENTORY_SERVER_URL || ''; // e.g. http://inventory-server:3001
+
+// Get all turtle summaries (for inventory dashboard sidebar widget)
+app.get('/api/integration/turtle-summary', (req, res) => {
+  const summaries = [];
+  for (const [id, turtle] of turtles) {
+    summaries.push({
+      id,
+      name: turtle.name || `Turtle ${id}`,
+      state: turtle.currentStateName || 'unknown',
+      fuel: turtle.fuelLevel ?? null,
+      position: turtle.position || null,
+      inventoryUsed: turtle.inventory
+        ? turtle.inventory.filter(s => s && s.name).length
+        : 0,
+      connected: turtle.connected || false,
+    });
+  }
+  res.json({ turtles: summaries });
+});
+
+// Proxy to inventory server (locate items for turtle pickup)
+app.get('/api/integration/inventory-locate', async (req, res) => {
+  if (!INVENTORY_SERVER_URL) {
+    return res.json({ configured: false, message: 'INVENTORY_SERVER_URL not configured' });
+  }
+  try {
+    const params = new URLSearchParams(req.query);
+    const resp = await fetch(`${INVENTORY_SERVER_URL}/api/integration/locate-item?${params}`);
+    const data = await resp.json();
+    res.json({ configured: true, ...data });
+  } catch (err) {
+    res.status(502).json({ configured: true, error: `Cannot reach inventory server: ${err.message}` });
+  }
+});
+
+// Proxy to inventory server (low stock alerts — turtles could auto-mine missing resources)
+app.get('/api/integration/inventory-alerts', async (req, res) => {
+  if (!INVENTORY_SERVER_URL) {
+    return res.json({ configured: false, message: 'INVENTORY_SERVER_URL not configured' });
+  }
+  try {
+    const resp = await fetch(`${INVENTORY_SERVER_URL}/api/integration/low-stock`);
+    const data = await resp.json();
+    res.json({ configured: true, ...data });
+  } catch (err) {
+    res.status(502).json({ configured: true, error: `Cannot reach inventory server: ${err.message}` });
+  }
+});
+
+// Proxy to inventory server (storage space check — should turtles keep mining?)
+app.get('/api/integration/storage-status', async (req, res) => {
+  if (!INVENTORY_SERVER_URL) {
+    return res.json({ configured: false, message: 'INVENTORY_SERVER_URL not configured' });
+  }
+  try {
+    const resp = await fetch(`${INVENTORY_SERVER_URL}/api/integration/storage-status`);
+    const data = await resp.json();
+    res.json({ configured: true, ...data });
+  } catch (err) {
+    res.status(502).json({ configured: true, error: `Cannot reach inventory server: ${err.message}` });
+  }
+});
+
 // Graceful shutdown
 process.on('SIGINT', () => {
   console.log('\n🛑 Shutting down server...');
@@ -1852,4 +1919,7 @@ server.listen(PORT, () => {
   console.log(`✅ Server ready!`);
   console.log(`\nConfigured turtles to send updates to:`);
   console.log(`  http://localhost:${PORT}/api/turtle/update`);
+  if (INVENTORY_SERVER_URL) {
+    console.log(`📦 Inventory server integration: ${INVENTORY_SERVER_URL}`);
+  }
 });