diff --git a/pkg/function-proxy/utils/proxy-utils.go b/pkg/function-proxy/utils/proxy-utils.go
index 77bce1c36..8fdc12c88 100644
--- a/pkg/function-proxy/utils/proxy-utils.go
+++ b/pkg/function-proxy/utils/proxy-utils.go
@@ -28,6 +28,7 @@ import (
 	"time"
 
 	"github.com/prometheus/client_golang/prometheus"
+	"github.com/prometheus/client_golang/prometheus/promhttp"
 )
 
 var (
@@ -50,6 +51,11 @@ var (
 	}, []string{"method"})
 )
 
+// PromHTTPHandler to expose the metrics, invoked in the golang runtime
+func PromHTTPHandler() http.Handler {
+	return promhttp.Handler()
+}
+
 func init() {
 	if timeout == "" {
 		timeout = "180"