JUMP TOOverviewQuick Start API GuideREST API OverviewRate LimitsIdempotent Notification RequestsNotificationCreate NotificationPush NotificationpostPush channel parametersEmailpostEmail channel parametersSMSpostSMS channel parametersTransactional MessagesView NotificationgetView notification responseView NotificationsgetDelete NotificationdeleteNotification HistorypostNotification History ParametersNotification ParametersLive ActivitiesStart Live ActivitypostUpdate Live ActivitypostLive Activity ParametersUserCreate userpostView usergetUpdate userpatchDelete userdeleteView user identitygetView user identity (by subscription)getCreate aliaspatchCreate alias (by subscription)patchDelete aliasdeleteSubscriptionsCreate subscription (by alias)postUpdate subscriptionpatchView subscription's IAMsgetDelete subscriptiondeleteTransfer subscriptionpatchUnsubscribe email (with token)postTemplatesCreate templatepostUpdate templatepatchView templatesgetView templategetDelete templatedeleteCopy template to other apppostSegmentsView segmentsgetCreate segmentpostDelete segmentdeleteConfigurationView appsgetView an appgetCreate an apppostUpdate an appputAnalyticsView OutcomesgetExport Subscriptions CSVpostExport Audience Activity CSVpostDeprecatedView devicesgetView devicegetAdd a devicepostEdit deviceputEdit tags with external user idputDelete Player RecorddeleteView Notificationget https://api.onesignal.com/notifications/{notification_id}?app_id={app_id}View the details of a single message and the Outcomes associated with it.Example cURLcurl "https://api.onesignal.com/notifications/NOTIFICATION_ID/?app_id=APP_ID" \ -H 'Authorization: BASIC REST_API_KEY'