diff --git a/packages/core/src/common/k8s-api/endpoints/metrics.api/request-metrics.injectable.ts b/packages/core/src/common/k8s-api/endpoints/metrics.api/request-metrics.injectable.ts
index e83c52b9aa..b61f9e400e 100644
--- a/packages/core/src/common/k8s-api/endpoints/metrics.api/request-metrics.injectable.ts
+++ b/packages/core/src/common/k8s-api/endpoints/metrics.api/request-metrics.injectable.ts
@@ -37,20 +37,19 @@ export interface RequestMetricsParams {
   namespace?: string;
 }
 
-export interface RequestMetrics {
-  (query: string, params?: RequestMetricsParams): Promise<MetricData>;
-  (query: string[], params?: RequestMetricsParams): Promise<MetricData[]>;
-  <Keys extends string>(query: Record<Keys, Partial<Record<string, string>>>, params?: RequestMetricsParams): Promise<Record<Keys, MetricData>>;
-}
+export type RequestMetrics = ReturnType<typeof requestMetricsInjectable["instantiate"]>;
 
 const requestMetricsInjectable = getInjectable({
   id: "request-metrics",
   instantiate: (di) => {
     const apiBase = di.inject(apiBaseInjectable);
 
-    return (async (query: object, params: RequestMetricsParams = {}) => {
-      const { range = 3600, step = 60, namespace } = params;
-      let { start, end } = params;
+    function requestMetrics(query: string, params?: RequestMetricsParams): Promise<MetricData>;
+    function requestMetrics(query: string[], params?: RequestMetricsParams): Promise<MetricData[]>;
+    function requestMetrics<Keys extends string>(query: Record<Keys, Partial<Record<string, string>>>, params?: RequestMetricsParams): Promise<Record<Keys, MetricData>>;
+    async function requestMetrics(query: string | string[] | Partial<Record<string, Partial<Record<string, string>>>>, params?: RequestMetricsParams): Promise<MetricData | MetricData[] | Partial<Record<string, MetricData>>> {
+      const { range = 3600, step = 60, namespace } = params ?? {};
+      let { start, end } = params ?? {};
 
       if (!start && !end) {
         const now = getSecondsFromUnixEpoch();
@@ -59,14 +58,18 @@ const requestMetricsInjectable = getInjectable({
         end = now;
       }
 
-      return apiBase.post("/metrics", {
+      const res = await apiBase.post("/metrics", {
         data: query,
         query: {
           start, end, step,
           "kubernetes_namespace": namespace,
         },
       });
-    }) as RequestMetrics;
+
+      return res;
+    }
+
+    return requestMetrics;
   },
 });