diff --git a/apps/openstackvtap/api/src/main/java/org/onosproject/openstackvtap/api/OpenstackVtapAdminService.java b/apps/openstackvtap/api/src/main/java/org/onosproject/openstackvtap/api/OpenstackVtapAdminService.java
new file mode 100644
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--- /dev/null
+++ b/apps/openstackvtap/api/src/main/java/org/onosproject/openstackvtap/api/OpenstackVtapAdminService.java
@@ -0,0 +1,74 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+ *
+ * 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.openstackvtap.api;
+
+import org.onlab.packet.VlanId;
+import org.onosproject.net.DeviceId;
+import org.onosproject.net.PortNumber;
+
+/**
+ * Service for administering the inventory of vTap.
+ */
+public interface OpenstackVtapAdminService extends OpenstackVtapService {
+
+    /**
+     * Creates a new vTap based on the specified description.
+     *
+     * @param type                  vTap type
+     * @param vTapCriterion         criterion of a vTap
+     * @return created vTap object or null if error occurred
+     */
+    OpenstackVtap createVtap(OpenstackVtap.Type type, OpenstackVtapCriterion vTapCriterion);
+
+    /**
+     * Updates the existing vTap based on the given vTap instance.
+     *
+     * @param vTapId             vTap identifier
+     * @param vTap               vTap instance to be modified
+     * @return updated vTap object or null if error occurred
+     */
+    OpenstackVtap updateVtap(OpenstackVtapId vTapId, OpenstackVtap vTap);
+
+    /**
+     * Removes the specified vTap with given vTap identifier.
+     *
+     * @param vTapId             vTap identifier
+     * @return removed vTap object or null if error occurred
+     */
+    OpenstackVtap removeVtap(OpenstackVtapId vTapId);
+
+    /**
+     * Sets output port and VLAN tag for vTap.
+     *
+     * @param deviceId           device identifier
+     * @param type               vTap type
+     * @param portNumber         port number
+     * @param vlanId             VLAN tag
+     */
+    void setVtapOutput(DeviceId deviceId, OpenstackVtap.Type type,
+                       PortNumber portNumber, VlanId vlanId);
+
+    /**
+     * Sets output port and VNI for vTap.
+     *
+     * @param deviceId          device identifier
+     * @param type              vTap type
+     * @param portNumber        port number
+     * @param vni               virtual network index (VNI) of VxLAN
+     */
+    void setVtapOutput(DeviceId deviceId, OpenstackVtap.Type type,
+                       PortNumber portNumber, int vni);
+}