diff --git a/client/src/App.tsx b/client/src/App.tsx
index a9adea53e..279605e7d 100644
--- a/client/src/App.tsx
+++ b/client/src/App.tsx
@@ -47,7 +47,7 @@ import ToolsTab from "./components/ToolsTab";
 
 const params = new URLSearchParams(window.location.search);
 const PROXY_PORT = params.get("proxyPort") ?? "3000";
-const PROXY_SERVER_URL = `http://localhost:${PROXY_PORT}`;
+const PROXY_SERVER_URL = `${params.get("proxyServerUrl") ?? "http://localhost"}:${PROXY_PORT}`;
 
 const App = () => {
   // Handle OAuth callback route