diff --git a/frontend/src/components/RestrictedAuth.vue b/frontend/src/components/RestrictedAuth.vue
index 76d16a7..21bdc16 100644
--- a/frontend/src/components/RestrictedAuth.vue
+++ b/frontend/src/components/RestrictedAuth.vue
@@ -44,7 +44,7 @@
 import { computed, onMounted, reactive, ref } from 'vue'
 import passkey from '@/utils/passkey'
 import { getSettings } from '@/utils/settings'
-import { apiJson, getUserFriendlyErrorMessage } from '@/utils/api'
+import { fetchJson, getUserFriendlyErrorMessage } from '@/utils/api'
 
 const props = defineProps({
   mode: {
@@ -121,7 +121,7 @@ async function fetchSettings() {
 
 async function fetchUserInfo() {
   try {
-    userInfo.value = await apiJson('/auth/api/user-info', { method: 'POST' })
+    userInfo.value = await fetchJson('/auth/api/user-info', { method: 'POST' })
     // Determine view based on authentication status
     if (isAuthenticated.value && props.mode !== 'reauth') {
       currentView.value = 'forbidden'
@@ -168,7 +168,7 @@ async function logoutUser() {
   if (loading.value) return
   loading.value = true
   try {
-    await apiJson('/auth/api/logout', { method: 'POST' })
+    await fetchJson('/auth/api/logout', { method: 'POST' })
     userInfo.value = null
     // Switch to login view after logout
     currentView.value = 'login'
@@ -191,7 +191,7 @@ async function setSessionCookie(result) {
     console.error('setSessionCookie called with missing session_token:', result)
     throw new Error('Authentication response missing session_token')
   }
-  return await apiJson('/auth/api/set-session', {
+  return await fetchJson('/auth/api/set-session', {
     method: 'POST', headers: { Authorization: `Bearer ${result.session_token}` }
   })
 }
diff --git a/frontend/src/utils/api.js b/frontend/src/utils/api.js
index 77db61f..80cee99 100644
--- a/frontend/src/utils/api.js
+++ b/frontend/src/utils/api.js
@@ -280,6 +280,36 @@ export async function apiJson(url, options = {}) {
   return data
 }
 
+/**
+ * Simple JSON fetch without auto-auth iframe handling.
+ * Use this in contexts where showing an auth iframe would be inappropriate
+ * (e.g., inside the auth iframe itself).
+ *
+ * @param {string|URL} url - The URL to fetch
+ * @param {RequestInit} [options] - Fetch options
+ * @returns {Promise<any>} - Parsed JSON response
+ * @throws {ApiError} - If response is not ok
+ */
+export async function fetchJson(url, options = {}) {
+  const fetchOptions = {
+    credentials: 'include',
+    ...options,
+    headers: {
+      'Accept': 'application/json',
+      ...options.headers,
+    },
+  }
+
+  const response = await fetch(url, fetchOptions)
+  const data = await response.json()
+
+  if (!response.ok) {
+    throw new ApiError(url, response, data)
+  }
+
+  return data
+}
+
 /**
  * Convert an error to a user-friendly message.
  * @param {Error} error - The error to convert