diff --git a/protocols/p4runtime/api/src/main/java/org/onosproject/p4runtime/api/P4RuntimeClientKey.java b/protocols/p4runtime/api/src/main/java/org/onosproject/p4runtime/api/P4RuntimeClientKey.java
new file mode 100644
index 0000000..70bf33c
--- /dev/null
+++ b/protocols/p4runtime/api/src/main/java/org/onosproject/p4runtime/api/P4RuntimeClientKey.java
@@ -0,0 +1,82 @@
+/*
+ * 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.p4runtime.api;
+
+import com.google.common.annotations.Beta;
+import org.onosproject.grpc.api.GrpcClientKey;
+import org.onosproject.net.DeviceId;
+
+import java.util.Objects;
+
+/**
+ * Key that uniquely identifies a P4Runtime client.
+ */
+@Beta
+public final class P4RuntimeClientKey extends GrpcClientKey {
+    private static final String P4R_SERVICE_NAME = "p4runtime";
+    private final long p4DeviceId;
+
+    /**
+     * Creates a new client key.
+     *
+     * @param deviceId   ONOS device ID
+     * @param serverAddr P4Runtime server address
+     * @param serverPort P4Runtime server port
+     * @param p4DeviceId P4Runtime server-internal device ID
+     */
+    public P4RuntimeClientKey(DeviceId deviceId, String serverAddr,
+                              int serverPort, long p4DeviceId) {
+        super(P4R_SERVICE_NAME, deviceId, serverAddr, serverPort);
+        this.p4DeviceId = p4DeviceId;
+    }
+
+    /**
+     * Returns the P4Runtime server-internal device ID.
+     *
+     * @return P4Runtime server-internal device ID
+     */
+    public long p4DeviceId() {
+        return p4DeviceId;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        }
+        if (o == null || getClass() != o.getClass()) {
+            return false;
+        }
+        if (!super.equals(o)) {
+            return false;
+        }
+        P4RuntimeClientKey that = (P4RuntimeClientKey) o;
+        return p4DeviceId == that.p4DeviceId;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(super.hashCode(), p4DeviceId);
+    }
+
+    @Override
+    public String toString() {
+        return super.toStringHelper()
+                .add("p4DeviceId", p4DeviceId)
+                .toString();
+    }
+}