diff --git a/pkg/models/metrics/metrics.go b/pkg/models/metrics/metrics.go
index 1af7eb63c..d92543bb3 100644
--- a/pkg/models/metrics/metrics.go
+++ b/pkg/models/metrics/metrics.go
@@ -49,6 +49,9 @@ const (
 type FormatedLevelMetric struct {
 	MetricsLevel string           `json:"metrics_level" description:"metric level, eg. cluster"`
 	Results      []FormatedMetric `json:"results" description:"actual array of results"`
+	CurrentPage  int              `json:"page,omitempty" description:"current page returned"`
+	TotalPage    int              `json:"total_page,omitempty" description:"total number of pages"`
+	TotalItem    int              `json:"total_item,omitempty" description:"page size"`
 }
 
 type FormatedMetric struct {
@@ -58,7 +61,7 @@ type FormatedMetric struct {
 }
 
 type FormatedMetricData struct {
-	Result     []map[string]interface{} `json:"result" description:"result including metric labels, time points and values"`
+	Result     []map[string]interface{} `json:"result" description:"metric data including metric metadata, time points and values"`
 	ResultType string                   `json:"resultType" description:"result type, one of matrix, vector"`
 }
 
diff --git a/pkg/models/metrics/util.go b/pkg/models/metrics/util.go
index ad6662ceb..250930f95 100644
--- a/pkg/models/metrics/util.go
+++ b/pkg/models/metrics/util.go
@@ -239,19 +239,11 @@ func Page(pageNum string, limitNum string, fmtLevelMetric *FormatedLevelMetric,
 	allPage := int(math.Ceil(float64(maxLength) / float64(limit)))
 
 	// add page fields
-	return &struct {
-		*FormatedLevelMetric
-		CurrentPage int    `json:"page"`
-		TotalPage   int    `json:"total_page"`
-		TotalItem   int    `json:"total_item"`
-		Message     string `json:"msg"`
-	}{
-		FormatedLevelMetric: fmtLevelMetric,
-		CurrentPage:         page,
-		TotalItem:           maxLength,
-		TotalPage:           allPage,
-		Message:             "paged",
-	}
+	fmtLevelMetric.CurrentPage = page
+	fmtLevelMetric.TotalItem = maxLength
+	fmtLevelMetric.TotalPage = allPage
+
+	return fmtLevelMetric
 }
 
 // maybe this function is time consuming