diff --git a/database/migrations/2025_12_06_add_last_seen_to_servers.sql b/database/migrations/2025_12_06_add_last_seen_to_servers.sql
new file mode 100644
index 0000000..928e374
--- /dev/null
+++ b/database/migrations/2025_12_06_add_last_seen_to_servers.sql
@@ -0,0 +1,9 @@
+-- Migração: Adicionar coluna last_seen à tabela servers
+-- Data: 2025-12-06
+-- Descrição: Permite rastrear quando o agente sincronizou pela última vez
+
+-- Adicionar coluna last_seen
+ALTER TABLE `servers` ADD COLUMN `last_seen` DATETIME NULL DEFAULT NULL AFTER `machine_id`;
+
+-- Criar índice para consultas de status online
+ALTER TABLE `servers` ADD INDEX `idx_last_seen` (`last_seen`);
diff --git a/database/schema.sql b/database/schema.sql
index f191f97..ab11843 100644
--- a/database/schema.sql
+++ b/database/schema.sql
@@ -49,12 +49,14 @@ CREATE TABLE `servers` (
   `ip_v6` varchar(100) DEFAULT NULL,
   `serial_key` varchar(255) NOT NULL,
   `machine_id` varchar(255) DEFAULT NULL,
+  `last_seen` datetime DEFAULT NULL,
   `status` enum('active','inactive') NOT NULL DEFAULT 'active',
   `created_at` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
   `updated_at` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
   PRIMARY KEY (`id`),
   UNIQUE KEY `serial_key` (`serial_key`),
   KEY `client_id` (`client_id`),
+  KEY `idx_last_seen` (`last_seen`),
   CONSTRAINT `fk_servers_client` FOREIGN KEY (`client_id`) REFERENCES `clients` (`id`) ON DELETE CASCADE
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;