Maintenance mode 
You can activate the maintenance mode of your store by selecting your sales channel and then activating the maintenance mode under Status
Detecting maintenance mode via API 
Maintenance mode is returned as an error from all of the endpoints. We can detect it by using onResponseError hook.
ts
import { isMaintenanceMode } from "@shopware-pwa/helpers-next";
const apiClient = createAPIClient({
  baseURL: shopwareEndpoint,
  accessToken: shopwareAccessToken,
  contextToken: Cookies.get("sw-context-token"),
});
apiClient.hook("onResponseError", (response) => {
  const error = isMaintenanceMode(response._data?.errors ?? []);
  // do proper reaction to maintenance mode
});Displaying maintenance page 
WARNING
This example is for Nuxt 3 apps
Throwing MAINTENANCE_MODE error 
Every error thrown within the application is automatically caught and the error.vue page is displayed.
ts
import { isMaintenanceMode } from "@shopware-pwa/helpers-next";
apiClient.hook("onResponseError", (response) => {
  const error = isMaintenanceMode(response._data?.errors ?? []);
  if (error) {
    throw createError({
      statusCode: 503,
      statusMessage: "MAINTENANCE_MODE",
    });
  }
});Displaying maintenance mode page 
vue
// error.vue
<script setup lang="ts">
const props = defineProps<{
  error: {
    statusCode: number;
    statusMessage: string;
    message: string;
  };
}>();
const isMaintenanceMode = computed(() => {
  return props.error.statusMessage === "MAINTENANCE_MODE";
});
</script>
<template>
  <div v-if="isMaintenanceMode">Maintenance Mode Page Content</div>
</template>