diff --git a/attribute/service.go b/attribute/service.go
new file mode 100644
index 0000000..42d3eb7
--- /dev/null
+++ b/attribute/service.go
@@ -0,0 +1,78 @@
+package attribute
+
+import (
+	"github.com/gin-gonic/gin"
+	"kumoly.io/kumoly/app/auth"
+	"kumoly.io/kumoly/app/server"
+	"kumoly.io/kumoly/app/store"
+)
+
+type Service struct{}
+
+func (srv Service) GetName() string           { return "attribute.Service" }
+func (srv Service) GetDependencies() []string { return []string{} }
+func (srv Service) IsService() bool           { return false }
+func (srv Service) Main() error               { return nil }
+func (srv Service) Del()                      {}
+func (srv Service) Health() error             { return nil }
+
+func (srv Service) Init() error {
+	Init()
+	return nil
+}
+
+func (srv Service) Load() error {
+	api := server.API.Group("attr", auth.ACAdmin())
+
+	api.GET("", func(c *gin.Context) {
+		key := c.Query("key")
+		if key == "" {
+			var attrs []Attribute
+			store.DB.Find(&attrs)
+			server.OK(c, attrs)
+		} else {
+			var attr Attribute
+			store.DB.Find(&attr, "key = ?", key)
+			server.OK(c, attr)
+		}
+	})
+
+	api.PUT("", func(c *gin.Context) {
+		var data struct {
+			Key   string `json:"key" binding:"required"`
+			Value string `json:"value" binding:"required"`
+		}
+		if err := c.ShouldBindJSON(&data); err != nil {
+			panic(err)
+		}
+		if err := store.DB.Model(&Attribute{}).Where("key = ?", data.Key).
+			Update("value", data.Value).Error; err != nil {
+			panic(err)
+		}
+		server.OK(c, "ok")
+	})
+
+	api.POST("restore", func(c *gin.Context) {
+		var data struct {
+			Key string `json:"key" binding:"required"`
+		}
+		if err := c.ShouldBindJSON(&data); err != nil {
+			panic(err)
+		}
+		result := store.DB.Exec(`update "attributes" set value = "default" where "key" = ?`, data.Key)
+		if result.Error != nil {
+			panic(result.Error)
+		}
+		server.OK(c, result.RowsAffected)
+	})
+
+	api.POST("restore_all", func(c *gin.Context) {
+		result := store.DB.Exec(`update "attributes" set value = "default"`)
+		if result.Error != nil {
+			panic(result.Error)
+		}
+		server.OK(c, result.RowsAffected)
+	})
+
+	return nil
+}
diff --git a/helper.go b/helper.go
index f58bb72..31ce611 100644
--- a/helper.go
+++ b/helper.go
@@ -20,13 +20,12 @@ func Default() *system.System {
 	sys := system.New()
 	server := server.New(viper.GetString("name"))
 
-	attribute.Init()
-
 	auth.Setup()
 	auth.SetDB(store.DB)
 
 	sys.Inject(auth.Injector(server.API))
 	sys.Append(server, auth.New(),
+		&attribute.Service{},
 		&task.Service{},
 		&history.Service{},
 		&email.Service{},