diff --git a/core/api/src/main/java/org/onosproject/app/ApplicationService.java b/core/api/src/main/java/org/onosproject/app/ApplicationService.java
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+++ b/core/api/src/main/java/org/onosproject/app/ApplicationService.java
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+/*
+ * Copyright 2015 Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.onosproject.app;
+
+import org.onosproject.core.Application;
+import org.onosproject.core.ApplicationId;
+import org.onosproject.core.Permission;
+
+import java.util.Set;
+
+/**
+ * Service for inspecting inventory of network control applications.
+ */
+public interface ApplicationService {
+
+    /**
+     * Returns the set of all installed applications.
+     *
+     * @return set of installed apps
+     */
+    Set<Application> getApplications();
+
+    /**
+     * Returns the registered id of the application with the given name.
+     *
+     * @param name application name
+     * @return registered application id
+     */
+    ApplicationId getId(String name);
+
+    /**
+     * Returns the application with the supplied application identifier.
+     *
+     * @param appId application identifier
+     * @return application descriptor
+     */
+    Application getApplication(ApplicationId appId);
+
+    /**
+     * Return the application state.
+     *
+     * @param appId application identifier
+     * @return application state
+     */
+    ApplicationState getState(ApplicationId appId);
+
+    /**
+     * Returns the permissions currently granted to the applications.
+     *
+     * @param appId application identifier
+     * @return set of granted permissions
+     */
+    Set<Permission> getPermissions(ApplicationId appId);
+
+    /**
+     * Adds the given listener for application lifecycle events.
+     *
+     * @param listener listener to be added
+     */
+    void addListener(ApplicationListener listener);
+
+    /**
+     * Removes the specified listener for application lifecycle events.
+     *
+     * @param listener listener to be removed
+     */
+    void removeListener(ApplicationListener listener);
+
+}