diff --git a/client/src/App.tsx b/client/src/App.tsx
index 054a4f69..26eb44c5 100644
--- a/client/src/App.tsx
+++ b/client/src/App.tsx
@@ -347,9 +347,10 @@ const App = () => {
 
   useEffect(() => {
     const headers: HeadersInit = {};
-    const proxyAuthToken = getMCPProxyAuthToken(config);
+    const { token: proxyAuthToken, header: proxyAuthTokenHeader } =
+      getMCPProxyAuthToken(config);
     if (proxyAuthToken) {
-      headers["Authorization"] = `Bearer ${proxyAuthToken}`;
+      headers[proxyAuthTokenHeader] = `Bearer ${proxyAuthToken}`;
     }
 
     fetch(`${getMCPProxyAddress(config)}/config`, { headers })
diff --git a/client/src/__tests__/App.config.test.tsx b/client/src/__tests__/App.config.test.tsx
index 9b0dedcd..b2e03d36 100644
--- a/client/src/__tests__/App.config.test.tsx
+++ b/client/src/__tests__/App.config.test.tsx
@@ -1,7 +1,8 @@
-import React from "react";
 import { render, waitFor } from "@testing-library/react";
 import App from "../App";
 import { DEFAULT_INSPECTOR_CONFIG } from "../lib/constants";
+import { InspectorConfig } from "../lib/configurationTypes";
+import * as configUtils from "../utils/configUtils";
 
 // Mock auth dependencies first
 jest.mock("@modelcontextprotocol/sdk/client/auth.js", () => ({
@@ -24,7 +25,7 @@ jest.mock("../lib/auth", () => ({
 jest.mock("../utils/configUtils", () => ({
   ...jest.requireActual("../utils/configUtils"),
   getMCPProxyAddress: jest.fn(() => "http://localhost:6277"),
-  getMCPProxyAuthToken: jest.fn((config) => ({
+  getMCPProxyAuthToken: jest.fn((config: InspectorConfig) => ({
     token: config.MCP_PROXY_AUTH_TOKEN.value,
     header: "X-MCP-Proxy-Auth",
   })),
@@ -36,6 +37,11 @@ jest.mock("../utils/configUtils", () => ({
   saveInspectorConfig: jest.fn(),
 }));
 
+// Get references to the mocked functions
+const mockGetMCPProxyAuthToken = configUtils.getMCPProxyAuthToken as jest.Mock;
+const mockInitializeInspectorConfig =
+  configUtils.initializeInspectorConfig as jest.Mock;
+
 // Mock other dependencies
 jest.mock("../lib/hooks/useConnection", () => ({
   useConnection: () => ({
@@ -87,10 +93,9 @@ describe("App - Config Endpoint", () => {
 
   afterEach(() => {
     jest.clearAllMocks();
-    
+
     // Reset getMCPProxyAuthToken to default behavior
-    const { getMCPProxyAuthToken } = require("../utils/configUtils");
-    getMCPProxyAuthToken.mockImplementation((config) => ({
+    mockGetMCPProxyAuthToken.mockImplementation((config: InspectorConfig) => ({
       token: config.MCP_PROXY_AUTH_TOKEN.value,
       header: "X-MCP-Proxy-Auth",
     }));
@@ -106,8 +111,7 @@ describe("App - Config Endpoint", () => {
     };
 
     // Mock initializeInspectorConfig to return our test config
-    const { initializeInspectorConfig } = require("../utils/configUtils");
-    initializeInspectorConfig.mockReturnValue(mockConfig);
+    mockInitializeInspectorConfig.mockReturnValue(mockConfig);
 
     render(<App />);
 
@@ -118,7 +122,7 @@ describe("App - Config Endpoint", () => {
           headers: {
             "X-MCP-Proxy-Auth": "Bearer test-proxy-token",
           },
-        }
+        },
       );
     });
   });
@@ -133,8 +137,7 @@ describe("App - Config Endpoint", () => {
     };
 
     // Mock initializeInspectorConfig to return our test config
-    const { initializeInspectorConfig } = require("../utils/configUtils");
-    initializeInspectorConfig.mockReturnValue(mockConfig);
+    mockInitializeInspectorConfig.mockReturnValue(mockConfig);
 
     render(<App />);
 
@@ -143,7 +146,7 @@ describe("App - Config Endpoint", () => {
         "http://localhost:6277/config",
         {
           headers: {},
-        }
+        },
       );
     });
   });
@@ -158,12 +161,11 @@ describe("App - Config Endpoint", () => {
     };
 
     // Mock to return a custom header name
-    const { getMCPProxyAuthToken, initializeInspectorConfig } = require("../utils/configUtils");
-    getMCPProxyAuthToken.mockReturnValue({
+    mockGetMCPProxyAuthToken.mockReturnValue({
       token: "test-proxy-token",
       header: "X-Custom-Auth",
     });
-    initializeInspectorConfig.mockReturnValue(mockConfig);
+    mockInitializeInspectorConfig.mockReturnValue(mockConfig);
 
     render(<App />);
 
@@ -174,7 +176,7 @@ describe("App - Config Endpoint", () => {
           headers: {
             "X-Custom-Auth": "Bearer test-proxy-token",
           },
-        }
+        },
       );
     });
   });
@@ -188,10 +190,9 @@ describe("App - Config Endpoint", () => {
       },
     };
 
-    const { initializeInspectorConfig } = require("../utils/configUtils");
-    initializeInspectorConfig.mockReturnValue(mockConfig);
+    mockInitializeInspectorConfig.mockReturnValue(mockConfig);
 
-    const { container } = render(<App />);
+    render(<App />);
 
     await waitFor(() => {
       expect(global.fetch).toHaveBeenCalledTimes(1);
@@ -204,7 +205,7 @@ describe("App - Config Endpoint", () => {
         headers: expect.objectContaining({
           "X-MCP-Proxy-Auth": "Bearer test-proxy-token",
         }),
-      })
+      }),
     );
   });
 
@@ -217,8 +218,7 @@ describe("App - Config Endpoint", () => {
       },
     };
 
-    const { initializeInspectorConfig } = require("../utils/configUtils");
-    initializeInspectorConfig.mockReturnValue(mockConfig);
+    mockInitializeInspectorConfig.mockReturnValue(mockConfig);
 
     // Mock fetch to reject
     (global.fetch as jest.Mock).mockRejectedValue(new Error("Network error"));
@@ -231,10 +231,10 @@ describe("App - Config Endpoint", () => {
     await waitFor(() => {
       expect(consoleErrorSpy).toHaveBeenCalledWith(
         "Error fetching default environment:",
-        expect.any(Error)
+        expect.any(Error),
       );
     });
 
     consoleErrorSpy.mockRestore();
   });
-});
\ No newline at end of file
+});
diff --git a/client/src/lib/hooks/useConnection.ts b/client/src/lib/hooks/useConnection.ts
index 9c578fba..81112b8a 100644
--- a/client/src/lib/hooks/useConnection.ts
+++ b/client/src/lib/hooks/useConnection.ts
@@ -243,10 +243,11 @@ export function useConnection({
   const checkProxyHealth = async () => {
     try {
       const proxyHealthUrl = new URL(`${getMCPProxyAddress(config)}/health`);
-      const proxyAuthToken = getMCPProxyAuthToken(config);
+      const { token: proxyAuthToken, header: proxyAuthTokenHeader } =
+        getMCPProxyAuthToken(config);
       const headers: HeadersInit = {};
       if (proxyAuthToken) {
-        headers["X-MCP-Proxy-Auth"] = `Bearer ${proxyAuthToken}`;
+        headers[proxyAuthTokenHeader] = `Bearer ${proxyAuthToken}`;
       }
       const proxyHealthResponse = await fetch(proxyHealthUrl, { headers });
       const proxyHealth = await proxyHealthResponse.json();
@@ -332,10 +333,11 @@ export function useConnection({
       }
 
       // Add proxy authentication
-      const proxyAuthToken = getMCPProxyAuthToken(config);
+      const { token: proxyAuthToken, header: proxyAuthTokenHeader } =
+        getMCPProxyAuthToken(config);
       const proxyHeaders: HeadersInit = {};
       if (proxyAuthToken) {
-        proxyHeaders["X-MCP-Proxy-Auth"] = `Bearer ${proxyAuthToken}`;
+        proxyHeaders[proxyAuthTokenHeader] = `Bearer ${proxyAuthToken}`;
       }
 
       // Create appropriate transport
diff --git a/client/src/utils/__tests__/configUtils.test.ts b/client/src/utils/__tests__/configUtils.test.ts
index 38ce163b..86dccbdf 100644
--- a/client/src/utils/__tests__/configUtils.test.ts
+++ b/client/src/utils/__tests__/configUtils.test.ts
@@ -57,7 +57,7 @@ describe("configUtils", () => {
         ...DEFAULT_INSPECTOR_CONFIG,
         MCP_PROXY_AUTH_TOKEN: {
           ...DEFAULT_INSPECTOR_CONFIG.MCP_PROXY_AUTH_TOKEN,
-          value: null as any,
+          value: null as unknown as string,
         },
       };
 
@@ -69,4 +69,4 @@ describe("configUtils", () => {
       });
     });
   });
-});
\ No newline at end of file
+});
diff --git a/client/src/utils/configUtils.ts b/client/src/utils/configUtils.ts
index 3e4d3e9b..40e47a94 100644
--- a/client/src/utils/configUtils.ts
+++ b/client/src/utils/configUtils.ts
@@ -28,8 +28,16 @@ export const getMCPServerRequestMaxTotalTimeout = (
   return config.MCP_REQUEST_MAX_TOTAL_TIMEOUT.value as number;
 };
 
-export const getMCPProxyAuthToken = (config: InspectorConfig): string => {
-  return config.MCP_PROXY_AUTH_TOKEN.value as string;
+export const getMCPProxyAuthToken = (
+  config: InspectorConfig,
+): {
+  token: string;
+  header: string;
+} => {
+  return {
+    token: config.MCP_PROXY_AUTH_TOKEN.value as string,
+    header: "X-MCP-Proxy-Auth",
+  };
 };
 
 const getSearchParam = (key: string): string | null => {