diff --git a/modules/api/mw.echo.api.APIHandler.js b/modules/api/mw.echo.api.APIHandler.js
index ad45ceaf1..06760ae25 100644
--- a/modules/api/mw.echo.api.APIHandler.js
+++ b/modules/api/mw.echo.api.APIHandler.js
@@ -182,6 +182,7 @@
 	/**
 	 * Mark all notifications as read
 	 *
+	 * @param {string} source Wiki name
 	 * @param {string|string[]} type Notification type 'message', 'alert' or 'all'.
 	 * @return {jQuery.Promise} A promise that resolves when all notifications
 	 *  are marked as read.
@@ -192,6 +193,7 @@
 	 * Mark multiple notification items as read using specific IDs
 	 *
 	 * @abstract
+	 * @param {string} source Wiki name
 	 * @param {string[]} itemIdArray An array of notification item IDs
 	 * @param {boolean} [isRead] Item's new read state; true for marking the item
 	 *  as read, false for marking the item as unread
diff --git a/modules/api/mw.echo.api.EchoApi.js b/modules/api/mw.echo.api.EchoApi.js
index 44992183c..80163d22e 100644
--- a/modules/api/mw.echo.api.EchoApi.js
+++ b/modules/api/mw.echo.api.EchoApi.js
@@ -239,7 +239,8 @@
 	 *  for that type in the given source
 	 */
 	mw.echo.api.EchoApi.prototype.markItemsRead = function ( itemIds, source, isRead ) {
-		return this.network.getApiHandler( source ).markItemsRead( itemIds, isRead );
+		// markasread is proxied via the local API
+		return this.network.getApiHandler( 'local' ).markItemsRead( source, itemIds, isRead );
 	};
 
 	/**
@@ -252,7 +253,8 @@
 	 *  for that type in the given source
 	 */
 	mw.echo.api.EchoApi.prototype.markAllRead = function ( source, type ) {
-		return this.network.getApiHandler( source ).markAllRead( type );
+		// markasread is proxied via the local API
+		return this.network.getApiHandler( 'local' ).markAllRead( source, type );
 	};
 
 	/**
diff --git a/modules/api/mw.echo.api.LocalAPIHandler.js b/modules/api/mw.echo.api.LocalAPIHandler.js
index ac9ec18f7..da86b1fef 100644
--- a/modules/api/mw.echo.api.LocalAPIHandler.js
+++ b/modules/api/mw.echo.api.LocalAPIHandler.js
@@ -53,13 +53,18 @@
 	/**
 	 * @inheritdoc
 	 */
-	mw.echo.api.LocalAPIHandler.prototype.markAllRead = function ( type ) {
+	mw.echo.api.LocalAPIHandler.prototype.markAllRead = function ( source, type ) {
+		var data;
 		type = Array.isArray( type ) ? type : [ type ];
-
-		return this.api.postWithToken( 'csrf', {
+		data = {
 			action: 'echomarkread',
 			sections: type.join( '|' )
-		} )
+		};
+		if ( !this.isSourceLocal( source ) ) {
+			data.wikis = source;
+		}
+
+		return this.api.postWithToken( 'csrf', data )
 			.then( function ( result ) {
 				return OO.getProp( result.query, 'echomarkread', type, 'rawcount' ) || 0;
 			} );
@@ -68,11 +73,15 @@
 	/**
 	 * @inheritdoc
 	 */
-	mw.echo.api.LocalAPIHandler.prototype.markItemsRead = function ( itemIdArray, isRead ) {
+	mw.echo.api.LocalAPIHandler.prototype.markItemsRead = function ( source, itemIdArray, isRead ) {
 		var data = {
 			action: 'echomarkread'
 		};
 
+		if ( !this.isSourceLocal( source ) ) {
+			data.wikis = source;
+		}
+
 		if ( isRead ) {
 			data.list = itemIdArray.join( '|' );
 		} else {