diff --git a/libs/appfunctions/api/current.txt b/libs/appfunctions/api/current.txt
index bc269fe..e9845c1 100644
--- a/libs/appfunctions/api/current.txt
+++ b/libs/appfunctions/api/current.txt
@@ -15,7 +15,8 @@
   public abstract class AppFunctionService extends android.app.Service {
     ctor public AppFunctionService();
     method @NonNull public final android.os.IBinder onBind(@Nullable android.content.Intent);
-    method @MainThread public void onExecuteFunction(@NonNull com.google.android.appfunctions.sidecar.ExecuteAppFunctionRequest, @NonNull android.os.CancellationSignal, @NonNull java.util.function.Consumer<com.google.android.appfunctions.sidecar.ExecuteAppFunctionResponse>);
+    method @MainThread public void onExecuteFunction(@NonNull com.google.android.appfunctions.sidecar.ExecuteAppFunctionRequest, @NonNull String, @NonNull android.os.CancellationSignal, @NonNull java.util.function.Consumer<com.google.android.appfunctions.sidecar.ExecuteAppFunctionResponse>);
+    method @Deprecated @MainThread public void onExecuteFunction(@NonNull com.google.android.appfunctions.sidecar.ExecuteAppFunctionRequest, @NonNull android.os.CancellationSignal, @NonNull java.util.function.Consumer<com.google.android.appfunctions.sidecar.ExecuteAppFunctionResponse>);
     method @Deprecated @MainThread public void onExecuteFunction(@NonNull com.google.android.appfunctions.sidecar.ExecuteAppFunctionRequest, @NonNull java.util.function.Consumer<com.google.android.appfunctions.sidecar.ExecuteAppFunctionResponse>);
     field @NonNull public static final String BIND_APP_FUNCTION_SERVICE = "android.permission.BIND_APP_FUNCTION_SERVICE";
     field @NonNull public static final String SERVICE_INTERFACE = "android.app.appfunctions.AppFunctionService";
diff --git a/libs/appfunctions/java/com/google/android/appfunctions/sidecar/AppFunctionService.java b/libs/appfunctions/java/com/google/android/appfunctions/sidecar/AppFunctionService.java
index 6e91de6..2a168e8 100644
--- a/libs/appfunctions/java/com/google/android/appfunctions/sidecar/AppFunctionService.java
+++ b/libs/appfunctions/java/com/google/android/appfunctions/sidecar/AppFunctionService.java
@@ -24,8 +24,8 @@
 import android.app.Service;
 import android.content.Intent;
 import android.os.Binder;
-import android.os.IBinder;
 import android.os.CancellationSignal;
+import android.os.IBinder;
 import android.util.Log;
 
 import java.util.function.Consumer;
@@ -71,18 +71,21 @@
     private final Binder mBinder =
             android.app.appfunctions.AppFunctionService.createBinder(
                     /* context= */ this,
-                    /* onExecuteFunction= */ (platformRequest, cancellationSignal, callback) -> {
+                    /* onExecuteFunction= */ (platformRequest,
+                            callingPackage,
+                            cancellationSignal,
+                            callback) -> {
                         AppFunctionService.this.onExecuteFunction(
                                 SidecarConverter.getSidecarExecuteAppFunctionRequest(
                                         platformRequest),
+                                callingPackage,
                                 cancellationSignal,
                                 (sidecarResponse) -> {
                                     callback.accept(
                                             SidecarConverter.getPlatformExecuteAppFunctionResponse(
                                                     sidecarResponse));
                                 });
-                    }
-            );
+                    });
 
     @NonNull
     @Override
@@ -107,13 +110,51 @@
      * thread and dispatch the result with the given callback. You should always report back the
      * result using the callback, no matter if the execution was successful or not.
      *
+     * <p>This method also accepts a {@link CancellationSignal} that the app should listen to cancel
+     * the execution of function if requested by the system.
+     *
      * @param request The function execution request.
-     * @param cancellationSignal A {@link CancellationSignal} to cancel the request.
+     * @param callingPackage The package name of the app that is requesting the execution.
+     * @param cancellationSignal A signal to cancel the execution.
      * @param callback A callback to report back the result.
      */
     @MainThread
     public void onExecuteFunction(
             @NonNull ExecuteAppFunctionRequest request,
+            @NonNull String callingPackage,
+            @NonNull CancellationSignal cancellationSignal,
+            @NonNull Consumer<ExecuteAppFunctionResponse> callback) {
+        onExecuteFunction(request, cancellationSignal, callback);
+    }
+
+    /**
+     * Called by the system to execute a specific app function.
+     *
+     * <p>This method is triggered when the system requests your AppFunctionService to handle a
+     * particular function you have registered and made available.
+     *
+     * <p>To ensure proper routing of function requests, assign a unique identifier to each
+     * function. This identifier doesn't need to be globally unique, but it must be unique within
+     * your app. For example, a function to order food could be identified as "orderFood". In most
+     * cases this identifier should come from the ID automatically generated by the AppFunctions
+     * SDK. You can determine the specific function to invoke by calling {@link
+     * ExecuteAppFunctionRequest#getFunctionIdentifier()}.
+     *
+     * <p>This method is always triggered in the main thread. You should run heavy tasks on a worker
+     * thread and dispatch the result with the given callback. You should always report back the
+     * result using the callback, no matter if the execution was successful or not.
+     *
+     * @param request The function execution request.
+     * @param cancellationSignal A {@link CancellationSignal} to cancel the request.
+     * @param callback A callback to report back the result.
+     * @deprecated Use {@link #onExecuteFunction(ExecuteAppFunctionRequest, String,
+     *     CancellationSignal, Consumer)} instead. This method will be removed once usage references
+     *     are updated.
+     */
+    @MainThread
+    @Deprecated
+    public void onExecuteFunction(
+            @NonNull ExecuteAppFunctionRequest request,
             @NonNull CancellationSignal cancellationSignal,
             @NonNull Consumer<ExecuteAppFunctionResponse> callback) {
         onExecuteFunction(request, callback);
@@ -138,7 +179,6 @@
      *
      * @param request The function execution request.
      * @param callback A callback to report back the result.
-     *
      * @deprecated Use {@link #onExecuteFunction(ExecuteAppFunctionRequest, CancellationSignal,
      *     Consumer)} instead. This method will be removed once usage references are updated.
      */
diff --git a/libs/appfunctions/java/com/google/android/appfunctions/sidecar/ExecuteAppFunctionResponse.java b/libs/appfunctions/java/com/google/android/appfunctions/sidecar/ExecuteAppFunctionResponse.java
index d87fec79..969e5d5 100644
--- a/libs/appfunctions/java/com/google/android/appfunctions/sidecar/ExecuteAppFunctionResponse.java
+++ b/libs/appfunctions/java/com/google/android/appfunctions/sidecar/ExecuteAppFunctionResponse.java
@@ -234,12 +234,13 @@
     @IntDef(
             prefix = {"RESULT_"},
             value = {
-                    RESULT_OK,
-                    RESULT_DENIED,
-                    RESULT_APP_UNKNOWN_ERROR,
-                    RESULT_INTERNAL_ERROR,
-                    RESULT_INVALID_ARGUMENT,
-                    RESULT_DISABLED
+                RESULT_OK,
+                RESULT_DENIED,
+                RESULT_APP_UNKNOWN_ERROR,
+                RESULT_INTERNAL_ERROR,
+                RESULT_INVALID_ARGUMENT,
+                RESULT_DISABLED,
+                RESULT_CANCELLED
             })
     @Retention(RetentionPolicy.SOURCE)
     public @interface ResultCode {}