diff --git a/src/context/HubScriptInjector.tsx b/src/context/HubScriptInjector.tsx
index 14f5e0c..111e2a9 100644
--- a/src/context/HubScriptInjector.tsx
+++ b/src/context/HubScriptInjector.tsx
@@ -2,30 +2,34 @@
 import PropTypes from 'prop-types';
 import { useEffect } from 'react';
 import { HubListenerProps } from './RowndProvider';
+import { TargetWindow } from './types';
 
 declare global {
   interface Window {
     _rphConfig: any;
+    rownd: any;
   }
 }
 
-function setConfigValue(key: string, value: any) {
+function setConfigValue(targetWindow: TargetWindow, key: string, value: any) {
   if (!value) {
     return;
   }
 
-  window?._rphConfig.push([key, value]);
+  targetWindow?._rphConfig.push([key, value]);
 }
 
 type HubScriptInjectorProps = {
   appKey: string;
   stateListener: ({ state, api }: HubListenerProps) => void;
+  useIframeParent?: boolean;
   hubUrlOverride?: string;
   locationHash?: string;
 };
 
 export default function HubScriptInjector({
   appKey,
+  useIframeParent,
   hubUrlOverride,
   stateListener,
   locationHash,
@@ -36,48 +40,56 @@ export default function HubScriptInjector({
       return; // compat with server-side rendering
     }
 
-    const _rphConfig = (window._rphConfig = window._rphConfig || []);
-    const baseUrl =
-      window.localStorage.getItem('rph_base_url_override') ||
-      hubUrlOverride ||
-      'https://hub.rownd.io';
-    _rphConfig.push(['setBaseUrl', baseUrl]);
-    const d = document,
-      g = d.createElement('script'),
-      m = d.createElement('script'),
-      s = d.getElementsByTagName('script')[0];
-    g.noModule = true;
-    g.async = true;
-    g.src = baseUrl + '/static/scripts/rph.js';
-    m.type = 'module';
-    m.async = true;
-    m.src = baseUrl + '/static/scripts/rph.mjs';
+    let targetWindow: typeof window.parent | typeof window = window;
+    if (useIframeParent) {
+      targetWindow = window.parent;
+      window._rphConfig = targetWindow._rphConfig;
+    } else if (!targetWindow._rphConfig && !targetWindow.rownd) {
+      const _rphConfig = (window._rphConfig = window._rphConfig || []);
+      const baseUrl =
+        window.localStorage.getItem('rph_base_url_override') ||
+        hubUrlOverride ||
+        'https://hub.rownd.io';
+      _rphConfig.push(['setBaseUrl', baseUrl]);
+      const d = document,
+        g = d.createElement('script'),
+        m = d.createElement('script'),
+        s = d.getElementsByTagName('script')[0];
+      g.noModule = true;
+      g.async = true;
+      g.src = baseUrl + '/static/scripts/rph.js';
+      m.type = 'module';
+      m.async = true;
+      m.src = baseUrl + '/static/scripts/rph.mjs';
 
-    if (s?.parentNode) {
-      s.parentNode.insertBefore(g, s);
-      s.parentNode.insertBefore(m, s);
-    } else {
-      d.body.appendChild(g);
-      d.body.appendChild(m);
+      if (s?.parentNode) {
+        s.parentNode.insertBefore(g, s);
+        s.parentNode.insertBefore(m, s);
+      } else {
+        d.body.appendChild(g);
+        d.body.appendChild(m);
+      }
+
+      setConfigValue(targetWindow, 'setAppKey', appKey);
+      setConfigValue(targetWindow, 'setLocationHash', locationHash);
     }
 
-    setConfigValue('setAppKey', appKey);
-    setConfigValue('setStateListener', stateListener);
-    setConfigValue('setLocationHash', locationHash);
+    setConfigValue(targetWindow, 'setStateListener', stateListener);
 
-    if (window.localStorage.getItem('rph_log_level') === 'debug') {
+    if (targetWindow.localStorage.getItem('rph_log_level') === 'debug') {
       console.debug('[debug] rest:', rest);
     }
 
     if (rest) {
       Object.entries(rest).forEach(([key, value]) => {
         setConfigValue(
+          targetWindow,
           `set${key.charAt(0).toUpperCase() + key.substring(1)}`,
           value
         );
       });
 
-      if (window.localStorage.getItem('rph_log_level') === 'debug') {
+      if (targetWindow.localStorage.getItem('rph_log_level') === 'debug') {
         console.debug('[debug] hubConfig:', window._rphConfig);
       }
     }
diff --git a/src/context/RowndProvider.tsx b/src/context/RowndProvider.tsx
index 2178ee3..4dfa9c0 100644
--- a/src/context/RowndProvider.tsx
+++ b/src/context/RowndProvider.tsx
@@ -20,6 +20,7 @@ interface RowndProviderProps {
   apiUrl?: string;
   rootOrigin?: string;
   hubUrlOverride?: string;
+  useIframeParent?: boolean;
   postRegistrationUrl?: string;
   children: React.ReactNode;
 }
diff --git a/src/context/types.ts b/src/context/types.ts
index 51177f4..efecc1a 100644
--- a/src/context/types.ts
+++ b/src/context/types.ts
@@ -1,5 +1,7 @@
 type AuthLevel = 'instant' | 'guest' | 'unverified' | 'verified';
 
+export type TargetWindow = typeof window.parent | typeof window;
+
 export type TRowndContext = {
   requestSignIn: (e?: SignInProps) => void;
   signOut: () => void;