diff --git a/database/db.go b/database/db.go
index e0c50551..62cf1f11 100644
--- a/database/db.go
+++ b/database/db.go
@@ -40,6 +40,8 @@ func initModels() error {
 		&model.InboundClientIps{},
 		&xray.ClientTraffic{},
 		&model.HistoryOfSeeders{},
+		&model.SharedState{},
+		&model.NodeState{},
 	}
 	for _, model := range models {
 		if err := db.AutoMigrate(model); err != nil {
@@ -47,6 +49,9 @@ func initModels() error {
 			return err
 		}
 	}
+	if err := seedSharedAccountsVersion(db); err != nil {
+		return err
+	}
 	return nil
 }
 
diff --git a/database/db_test.go b/database/db_test.go
index a51b5c64..a64cb501 100644
--- a/database/db_test.go
+++ b/database/db_test.go
@@ -256,3 +256,67 @@ func TestSettingKey_IsUnique(t *testing.T) {
 		t.Fatal("expected duplicate setting key insert to fail")
 	}
 }
+
+func TestInitDB_CreatesSharedMetadataTables(t *testing.T) {
+	setupTestDB(t)
+
+	for _, table := range []string{"shared_states", "node_states"} {
+		var count int64
+		if err := db.Table(table).Count(&count).Error; err != nil {
+			t.Fatalf("table %s should exist: %v", table, err)
+		}
+	}
+}
+
+func TestBumpSharedAccountsVersion(t *testing.T) {
+	setupTestDB(t)
+
+	version, err := GetSharedAccountsVersion(GetDB())
+	if err != nil {
+		t.Fatalf("GetSharedAccountsVersion error: %v", err)
+	}
+	if version != 0 {
+		t.Fatalf("expected seeded version 0, got %d", version)
+	}
+
+	tx := GetDB().Begin()
+	if err := BumpSharedAccountsVersion(tx); err != nil {
+		t.Fatalf("BumpSharedAccountsVersion error: %v", err)
+	}
+	if err := tx.Commit().Error; err != nil {
+		t.Fatalf("Commit error: %v", err)
+	}
+
+	version, err = GetSharedAccountsVersion(GetDB())
+	if err != nil {
+		t.Fatalf("GetSharedAccountsVersion error: %v", err)
+	}
+	if version != 1 {
+		t.Fatalf("expected bumped version 1, got %d", version)
+	}
+}
+
+func TestUpsertNodeState(t *testing.T) {
+	setupTestDB(t)
+
+	state := &model.NodeState{
+		NodeID:          "worker-1",
+		NodeRole:        "worker",
+		LastSeenVersion: 7,
+		LastError:       "dial tcp timeout",
+	}
+	if err := UpsertNodeState(GetDB(), state); err != nil {
+		t.Fatalf("UpsertNodeState error: %v", err)
+	}
+
+	var stored model.NodeState
+	if err := GetDB().First(&stored, "node_id = ?", "worker-1").Error; err != nil {
+		t.Fatalf("lookup node state failed: %v", err)
+	}
+	if stored.LastSeenVersion != 7 {
+		t.Fatalf("expected last seen version 7, got %d", stored.LastSeenVersion)
+	}
+	if stored.LastError != "dial tcp timeout" {
+		t.Fatalf("expected last error to round-trip, got %q", stored.LastError)
+	}
+}
diff --git a/database/model/node_state.go b/database/model/node_state.go
new file mode 100644
index 00000000..79476a2f
--- /dev/null
+++ b/database/model/node_state.go
@@ -0,0 +1,11 @@
+package model
+
+type NodeState struct {
+	NodeID          string `json:"nodeId" gorm:"primaryKey"`
+	NodeRole        string `json:"nodeRole" gorm:"not null"`
+	LastSyncAt      int64  `json:"lastSyncAt"`
+	LastHeartbeatAt int64  `json:"lastHeartbeatAt"`
+	LastSeenVersion int64  `json:"lastSeenVersion"`
+	LastError       string `json:"lastError"`
+	UpdatedAt       int64  `json:"updatedAt"`
+}
diff --git a/database/model/shared_state.go b/database/model/shared_state.go
new file mode 100644
index 00000000..bb58fcc6
--- /dev/null
+++ b/database/model/shared_state.go
@@ -0,0 +1,7 @@
+package model
+
+type SharedState struct {
+	Key       string `json:"key" gorm:"primaryKey"`
+	Version   int64  `json:"version" gorm:"not null;default:0"`
+	UpdatedAt int64  `json:"updatedAt"`
+}
diff --git a/database/shared_state.go b/database/shared_state.go
new file mode 100644
index 00000000..1b4d5859
--- /dev/null
+++ b/database/shared_state.go
@@ -0,0 +1,50 @@
+package database
+
+import (
+	"time"
+
+	"github.com/mhsanaei/3x-ui/v2/database/model"
+	"gorm.io/gorm"
+)
+
+const SharedAccountsVersionKey = "shared_accounts_version"
+
+func txOrDB(tx *gorm.DB) *gorm.DB {
+	if tx != nil {
+		return tx
+	}
+	return GetDB()
+}
+
+func seedSharedAccountsVersion(tx *gorm.DB) error {
+	return txOrDB(tx).FirstOrCreate(
+		&model.SharedState{},
+		&model.SharedState{
+			Key:       SharedAccountsVersionKey,
+			Version:   0,
+			UpdatedAt: time.Now().Unix(),
+		},
+	).Error
+}
+
+func GetSharedAccountsVersion(tx *gorm.DB) (int64, error) {
+	state := &model.SharedState{}
+	if err := txOrDB(tx).First(state, "key = ?", SharedAccountsVersionKey).Error; err != nil {
+		return 0, err
+	}
+	return state.Version, nil
+}
+
+func BumpSharedAccountsVersion(tx *gorm.DB) error {
+	return txOrDB(tx).Model(&model.SharedState{}).
+		Where("key = ?", SharedAccountsVersionKey).
+		Updates(map[string]any{
+			"version":    gorm.Expr("version + 1"),
+			"updated_at": time.Now().Unix(),
+		}).Error
+}
+
+func UpsertNodeState(tx *gorm.DB, state *model.NodeState) error {
+	state.UpdatedAt = time.Now().Unix()
+	return txOrDB(tx).Save(state).Error
+}