diff --git a/src/addonloader/luaaddonstate.cpp b/src/addonloader/luaaddonstate.cpp
index 525ad0f..49eb2e7 100644
--- a/src/addonloader/luaaddonstate.cpp
+++ b/src/addonloader/luaaddonstate.cpp
@@ -158,6 +158,7 @@ LuaAddonState::LuaAddonState(Library *luaLibrary, const std::string &name,
             {"removeQuickPhraseHandler",
              &LuaAddonState::removeQuickPhraseHandler},
             {"commitString", &LuaAddonState::commitString},
+            {"forwardKey", &LuaAddonState::forwardKey},
             {"standardPathLocate", &LuaAddonState::standardPathLocate},
             {"UTF16ToUTF8", &LuaAddonState::UTF16ToUTF8},
             {"UTF8ToUTF16", &LuaAddonState::UTF8ToUTF16},
@@ -378,6 +379,15 @@ std::tuple<> LuaAddonState::commitStringImpl(const char *str) {
     return {};
 }
 
+std::tuple<> LuaAddonState::forwardKeyImpl(int keySym, int keyStates, bool release) {
+    if (auto *ic = inputContext_.get()) {
+        Key key(static_cast<KeySym>(keySym), static_cast<KeyStates>(keyStates));
+        ic->forwardKey(key, release);
+    }
+    return {};
+}
+
+
 bool LuaAddonState::handleQuickPhrase(
     InputContext *ic, const std::string &input,
     const QuickPhraseAddCandidateCallback &callback) {
diff --git a/src/addonloader/luaaddonstate.h b/src/addonloader/luaaddonstate.h
index 94139cc..53cf40c 100644
--- a/src/addonloader/luaaddonstate.h
+++ b/src/addonloader/luaaddonstate.h
@@ -175,6 +175,12 @@ class LuaAddonState {
     // @function commitString
     // @string str string to be commit to input context.
     DEFINE_LUA_FUNCTION(commitString);
+    /// Send a key event to client.
+    // @function forwardKey
+    // @int keySym A keySym of the key event.
+    // @int keyStates A modifier states of the key event.
+    // @boolean release Whether this is a key release event.
+    DEFINE_LUA_FUNCTION(forwardKey);
     /// Locate all files with given path and suffix.
     // @function standardPathLocate
     // @int type
@@ -230,6 +236,8 @@ class LuaAddonState {
     standardPathLocateImpl(int type, const char *path, const char *suffix);
 
     std::tuple<> commitStringImpl(const char *str);
+    std::tuple<> forwardKeyImpl(int keySym, int keyStates, bool release);
+
     FCITX_ADDON_DEPENDENCY_LOADER(quickphrase, instance_->addonManager());
 
     bool handleQuickPhrase(InputContext *ic, const std::string &input,