diff --git a/server.js b/server.js
index f1d0c99..08f85ea 100644
--- a/server.js
+++ b/server.js
@@ -2800,6 +2800,19 @@ app.get("/worker/notifications", authMiddleware, async (req, res) => {
     }
 });
 
+// 4. Marcar chat como leído por el operario
+app.post("/services/:id/chat/read", authMiddleware, async (req, res) => {
+    try {
+        await pool.query(
+            "UPDATE scraped_services SET last_chat_read_worker = NOW() WHERE id = $1 AND assigned_to = $2",
+            [req.params.id, req.user.sub]
+        );
+        res.json({ ok: true });
+    } catch (e) {
+        res.status(500).json({ ok: false });
+    }
+});
+
 // ==========================================
 // 💬 CHAT Y COMUNICACIÓN INTERNA (TIPO iTRAMIT)
 // ==========================================