diff --git a/apps/ui/static/api-client.js b/apps/ui/static/api-client.js
index 1217e82..f90e5d8 100644
--- a/apps/ui/static/api-client.js
+++ b/apps/ui/static/api-client.js
@@ -7,18 +7,19 @@
 
 class HomeAutomationClient {
     constructor() {
-        this.baseUrl = window.API_BASE || '';
         this.eventSource = null;
         this.eventListeners = [];
     }
 
     /**
      * Helper to construct full API URLs
+     * Reads window.API_BASE at runtime to support dynamic configuration
      * @param {string} path - API path (e.g., '/devices')
      * @returns {string} Full URL
      */
     api(path) {
-        return `${this.baseUrl}${path}`;
+        const baseUrl = window.API_BASE || '';
+        return `${baseUrl}${path}`;
     }
 
     /**