diff --git a/input.cpp b/input.cpp
--- a/input.cpp
+++ b/input.cpp
@@ -1868,6 +1868,8 @@
 
         conn->setInputConfig(kwinApp()->inputConfig());
         conn->updateLEDs(m_keyboard->xkb()->leds());
+        waylandServer()->updateKeyState(m_keyboard->xkb()->leds());
+        connect(m_keyboard, &KeyboardInputRedirection::ledsChanged, waylandServer(), &WaylandServer::updateKeyState);
         connect(m_keyboard, &KeyboardInputRedirection::ledsChanged, conn, &LibInput::Connection::updateLEDs);
         connect(conn, &LibInput::Connection::eventsRead, this,
             [this] {
diff --git a/wayland_server.h b/wayland_server.h
--- a/wayland_server.h
+++ b/wayland_server.h
@@ -21,6 +21,7 @@
 #define KWIN_WAYLAND_SERVER_H
 
 #include <kwinglobals.h>
+#include "keyboard_input.h"
 
 #include <QObject>
 
@@ -66,6 +67,7 @@
 class XdgShellInterface;
 class XdgForeignInterface;
 class XdgOutputManagerInterface;
+class KeyStateInterface;
 }
 }
 
@@ -220,6 +222,7 @@
     SocketPairConnection createConnection();
 
     void simulateUserActivity();
+    void updateKeyState(KWin::Xkb::LEDs leds);
 
 Q_SIGNALS:
     void shellClientAdded(KWin::ShellClient*);
@@ -275,6 +278,7 @@
 
     } m_internalConnection;
     KWayland::Server::XdgForeignInterface *m_XdgForeign = nullptr;
+    KWayland::Server::KeyStateInterface *m_keyState = nullptr;
     QList<ShellClient*> m_clients;
     QList<ShellClient*> m_internalClients;
     QHash<KWayland::Server::ClientConnection*, quint16> m_clientIds;
diff --git a/wayland_server.cpp b/wayland_server.cpp
--- a/wayland_server.cpp
+++ b/wayland_server.cpp
@@ -65,7 +65,7 @@
 #include <KWayland/Server/xdgshell_interface.h>
 #include <KWayland/Server/xdgforeign_interface.h>
 #include <KWayland/Server/xdgoutput_interface.h>
-
+#include <KWayland/Server/keystate_interface.h>
 
 // Qt
 #include <QDir>
@@ -375,6 +375,9 @@
     m_XdgForeign = m_display->createXdgForeignInterface(m_display);
     m_XdgForeign->create();
 
+    m_keyState = m_display->createKeyStateInterface(m_display);
+    m_keyState->create();
+
     return true;
 }
 
@@ -756,4 +759,14 @@
     }
 }
 
+void WaylandServer::updateKeyState(KWin::Xkb::LEDs leds)
+{
+    if (!m_keyState)
+        return;
+
+    m_keyState->setState(KeyStateInterface::Key::CapsLock, leds & KWin::Xkb::LED::CapsLock ? KeyStateInterface::State::Locked : KeyStateInterface::State::Unlocked);
+    m_keyState->setState(KeyStateInterface::Key::NumLock, leds & KWin::Xkb::LED::NumLock ? KeyStateInterface::State::Locked : KeyStateInterface::State::Unlocked);
+    m_keyState->setState(KeyStateInterface::Key::ScrollLock, leds & KWin::Xkb::LED::ScrollLock ? KeyStateInterface::State::Locked : KeyStateInterface::State::Unlocked);
+}
+
 }