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diff --git a/core/multiplayer/multiplayer.h b/core/multiplayer/multiplayer.h
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+/*************************************************************************/
+/*  multiplayer.h                                                        */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md).   */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+
+#ifndef MULTIPLAYER_H
+#define MULTIPLAYER_H
+
+#include "core/variant/binder_common.h"
+
+#include "core/string/string_name.h"
+
+namespace Multiplayer {
+
+enum TransferMode {
+	TRANSFER_MODE_UNRELIABLE,
+	TRANSFER_MODE_ORDERED,
+	TRANSFER_MODE_RELIABLE
+};
+
+enum RPCMode {
+	RPC_MODE_DISABLED, // No rpc for this method, calls to this will be blocked (default)
+	RPC_MODE_ANY, // Any peer can call this RPC
+	RPC_MODE_AUTHORITY, // / Only the node's multiplayer authority (server by default) can call this RPC
+};
+
+struct RPCConfig {
+	StringName name;
+	RPCMode rpc_mode = RPC_MODE_DISABLED;
+	bool sync = false;
+	TransferMode transfer_mode = TRANSFER_MODE_RELIABLE;
+	int channel = 0;
+
+	bool operator==(RPCConfig const &p_other) const {
+		return name == p_other.name;
+	}
+};
+
+struct SortRPCConfig {
+	StringName::AlphCompare compare;
+	bool operator()(const RPCConfig &p_a, const RPCConfig &p_b) const {
+		return compare(p_a.name, p_b.name);
+	}
+};
+
+}; // namespace Multiplayer
+
+// This is needed for proper docs generation (i.e. not "Multiplayer."-prefixed).
+typedef Multiplayer::RPCMode RPCMode;
+typedef Multiplayer::TransferMode TransferMode;
+
+VARIANT_ENUM_CAST(RPCMode);
+VARIANT_ENUM_CAST(TransferMode);
+
+#endif // MULTIPLAYER_H