diff --git a/apps/k8s-node/api/src/main/java/org/onosproject/k8snode/api/K8sHostService.java b/apps/k8s-node/api/src/main/java/org/onosproject/k8snode/api/K8sHostService.java
new file mode 100644
index 0000000..abdbb74
--- /dev/null
+++ b/apps/k8s-node/api/src/main/java/org/onosproject/k8snode/api/K8sHostService.java
@@ -0,0 +1,51 @@
+/*
+ * Copyright 2020-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.k8snode.api;
+
+import org.onlab.packet.IpAddress;
+import org.onosproject.event.ListenerService;
+
+import java.util.Set;
+
+/**
+ * Service for interfacing with the inventory of Kubernetes host.
+ */
+public interface K8sHostService extends ListenerService<K8sHostEvent, K8sHostListener> {
+
+    String APP_ID = "org.onosproject.k8snode";
+
+    /**
+     * Returns all registered hosts.
+     *
+     * @return set of kubernetes hosts
+     */
+    Set<K8sHost> hosts();
+
+    /**
+     * Returns all hosts with complete states.
+     *
+     * @return set of kubernetes hosts
+     */
+    Set<K8sHost> completeHosts();
+
+    /**
+     * Returns the host with the specified IP address.
+     *
+     * @param hostIp host IP address
+     * @return kubernetes host
+     */
+    K8sHost host(IpAddress hostIp);
+}