diff --git a/public/app/features/alerting/unified/api/alertmanager.ts b/public/app/features/alerting/unified/api/alertmanager.ts
index 27d080a6c4a0..708a289162ab 100644
--- a/public/app/features/alerting/unified/api/alertmanager.ts
+++ b/public/app/features/alerting/unified/api/alertmanager.ts
@@ -237,9 +237,9 @@ function getReceiverResultError(receiversResult: TestReceiversResult) {
 export async function addAlertManagers(alertManagerConfig: ExternalAlertmanagerConfig): Promise<void> {
   await lastValueFrom(
     getBackendSrv().fetch({
-      method: 'POST',
+      method: 'PUT',
       data: alertManagerConfig,
-      url: '/api/v1/ngalert/admin_config',
+      url: '/api/v1/provisioning/alert-rules',
       showErrorAlert: false,
       showSuccessAlert: false,
     })
@@ -263,7 +263,7 @@ export async function fetchExternalAlertmanagerConfig(): Promise<ExternalAlertma
   const result = await lastValueFrom(
     getBackendSrv().fetch<ExternalAlertmanagerConfig>({
       method: 'GET',
-      url: '/api/v1/ngalert/admin_config',
+      url: '/api/v1/provisioning/alert-rules',
       showErrorAlert: false,
     })
   );
diff --git a/public/app/features/alerting/unified/api/alertmanagerApi.ts b/public/app/features/alerting/unified/api/alertmanagerApi.ts
index c0c710922109..020de02153b7 100644
--- a/public/app/features/alerting/unified/api/alertmanagerApi.ts
+++ b/public/app/features/alerting/unified/api/alertmanagerApi.ts
@@ -96,17 +96,16 @@ export const alertmanagerApi = alertingApi.injectEndpoints({
     }),
 
     getExternalAlertmanagerConfig: build.query<ExternalAlertmanagerConfig, void>({
-      query: () => ({ url: '/api/v1/ngalert/admin_config' }),
+      query: () => ({ url: '/api/v1/provisioning/alert-rules' }),
       providesTags: ['AlertmanagerChoice'],
     }),
-
     getExternalAlertmanagers: build.query<ExternalAlertmanagers, void>({
       query: () => ({ url: '/api/v1/ngalert/alertmanagers' }),
       transformResponse: (response: ExternalAlertmanagersResponse) => response.data,
     }),
 
     saveExternalAlertmanagersConfig: build.mutation<{ message: string }, ExternalAlertmanagerConfig>({
-      query: (config) => ({ url: '/api/v1/ngalert/admin_config', method: 'POST', data: config }),
+      query: (config) => ({ url: '/api/v1/provisioning/alert-rules', method: 'PUT', data: config }),
       invalidatesTags: ['AlertmanagerChoice'],
     }),