diff --git a/sway/ipc-json.c b/sway/ipc-json.c
index 142512eb2..d3adedd4e 100644
--- a/sway/ipc-json.c
+++ b/sway/ipc-json.c
@@ -6,6 +6,7 @@
 #include <wlr/config.h>
 #include <wlr/types/wlr_content_type_v1.h>
 #include <wlr/types/wlr_output.h>
+#include <wlr/types/wlr_ext_foreign_toplevel_list_v1.h>
 #include <xkbcommon/xkbcommon.h>
 #include "config.h"
 #include "log.h"
@@ -577,6 +578,10 @@ static void ipc_json_describe_view(struct sway_container *c, json_object *object
 	json_object_object_add(object, "app_id",
 			app_id ? json_object_new_string(app_id) : NULL);
 
+	json_object_object_add(object, "foreign_toplevel_identifier",
+		c->view->ext_foreign_toplevel ?
+			json_object_new_string(c->view->ext_foreign_toplevel->identifier) : NULL);
+
 	bool visible = view_is_visible(c->view);
 	json_object_object_add(object, "visible", json_object_new_boolean(visible));
 
diff --git a/sway/sway-ipc.7.scd b/sway/sway-ipc.7.scd
index f39e35180..ab85cf66c 100644
--- a/sway/sway-ipc.7.scd
+++ b/sway/sway-ipc.7.scd
@@ -389,6 +389,9 @@ node and will have the following properties:
 |- pid
 :  integer
 :  (Only views) The PID of the application that owns the view
+|- foreign_toplevel_identifier
+:  string
+:  (Only views) The ext-foreign-toplevel-list-v1 toplevel identifier of this node.
 |- visible
 :  boolean
 :  (Only views) Whether the node is visible
diff --git a/swaymsg/main.c b/swaymsg/main.c
index 0ef6eb8a5..7534ea6db 100644
--- a/swaymsg/main.c
+++ b/swaymsg/main.c
@@ -330,6 +330,7 @@ static void pretty_print_tree(json_object *obj, int indent) {
 		const char *instance = json_object_get_string(json_object_object_get(window_props_obj, "instance"));
 		const char *class = json_object_get_string(json_object_object_get(window_props_obj, "class"));
 		int x11_id = json_object_get_int(json_object_object_get(obj, "window"));
+		const char *foreign_toplevel_id = json_object_get_string(json_object_object_get(obj, "foreign_toplevel_identifier"));
 		const char *sandbox_engine = json_object_get_string(json_object_object_get(obj, "sandbox_engine"));
 		const char *sandbox_app_id = json_object_get_string(json_object_object_get(obj, "sandbox_app_id"));
 		const char *sandbox_instance_id = json_object_get_string(json_object_object_get(obj, "sandbox_instance_id"));
@@ -347,6 +348,9 @@ static void pretty_print_tree(json_object *obj, int indent) {
 		if (x11_id != 0) {
 			printf(", X11 window: 0x%X", x11_id);
 		}
+		if (foreign_toplevel_id != NULL) {
+			printf(", foreign_toplevel_id: \"%s\"", foreign_toplevel_id);
+		}
 		if (sandbox_engine != NULL) {
 			printf(", sandbox_engine: \"%s\"", sandbox_engine);
 		}