diff --git a/src/indexPage/endpoint.js b/src/indexPage/endpoint.js
index 7032919acd..872d037d90 100644
--- a/src/indexPage/endpoint.js
+++ b/src/indexPage/endpoint.js
@@ -1,5 +1,6 @@
 import { get as getStorage, set as setStorage } from '../common/utils/storageManager';
 import { generateWebSocketURL, getDefaultEndpoint, generateTestLiveApiInstance } from '../common/appId';
+import { translate } from '../common/utils/tools';
 
 if (document.location.href.endsWith('/endpoint')) {
     window.location.replace(`${document.location.href}.html`);
@@ -64,6 +65,15 @@ function addEndpoint(e) {
     setStorage('config.server_url', serverUrl);
     setStorage('config.app_id', appId);
 
+    const urlReg = /^(?:http(s)?:\/\/)?[\w.-]+(?:.[\w.-]+)+[\w-._~:\/?#[\]@!$&'()*+,;=.]+$/;
+
+    if (!urlReg.test(serverUrl)) {
+        $('#error')
+            .html(translate('Please enter a valid server URL'))
+            .show();
+        return;
+    }
+
     checkConnection(appId, serverUrl);
 }