diff --git a/server/handlers/admin.go b/server/handlers/admin.go
index 3c8b733..e621fef 100644
--- a/server/handlers/admin.go
+++ b/server/handlers/admin.go
@@ -36,7 +36,16 @@ func AdminSettings(ctx *gin.Context) {
 	// user := ctx.MustGet("user").(*op.User)
 	group := ctx.Param("group")
 	if group == "" {
-		ctx.AbortWithStatusJSON(http.StatusBadRequest, model.NewApiErrorStringResp("group is required"))
+		resp := make(model.AdminSettingsResp, len(settings.GroupSettings))
+		for sg, v := range settings.GroupSettings {
+			if resp[string(sg)] == nil {
+				resp[string(sg)] = make(gin.H, len(v))
+			}
+			for _, s2 := range v {
+				resp[string(sg)][s2.Name()] = s2.Interface()
+			}
+		}
+		ctx.JSON(http.StatusOK, model.NewApiDataResp(resp))
 		return
 	}
 
diff --git a/server/handlers/init.go b/server/handlers/init.go
index 9e82f45..8a26591 100644
--- a/server/handlers/init.go
+++ b/server/handlers/init.go
@@ -30,6 +30,8 @@ func Init(e *gin.Engine) {
 			root.Use(middlewares.AuthRootMiddleware)
 
 			{
+				admin.GET("/settings", AdminSettings)
+
 				admin.GET("/settings/:group", AdminSettings)
 
 				admin.POST("/settings", EditAdminSettings)
diff --git a/server/model/admin.go b/server/model/admin.go
index 385b651..e8c4ad1 100644
--- a/server/model/admin.go
+++ b/server/model/admin.go
@@ -20,3 +20,5 @@ func (asr *AdminSettingsReq) Validate() error {
 func (asr *AdminSettingsReq) Decode(ctx *gin.Context) error {
 	return json.NewDecoder(ctx.Request.Body).Decode(asr)
 }
+
+type AdminSettingsResp map[string]map[string]any