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diff --git a/src/core/ext/filters/client_channel/server_address.h b/src/core/ext/filters/client_channel/server_address.h
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+++ b/src/core/ext/filters/client_channel/server_address.h
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+/*
+ *
+ * Copyright 2018 gRPC authors.
+ *
+ * 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.
+ *
+ */
+
+#ifndef GRPC_CORE_EXT_FILTERS_CLIENT_CHANNEL_SERVER_ADDRESS_H
+#define GRPC_CORE_EXT_FILTERS_CLIENT_CHANNEL_SERVER_ADDRESS_H
+
+#include <grpc/support/port_platform.h>
+
+#include "src/core/lib/channel/channel_args.h"
+#include "src/core/lib/gprpp/inlined_vector.h"
+#include "src/core/lib/iomgr/resolve_address.h"
+#include "src/core/lib/uri/uri_parser.h"
+
+// Channel arg key for ServerAddressList.
+#define GRPC_ARG_SERVER_ADDRESS_LIST "grpc.server_address_list"
+
+// Channel arg key for a bool indicating whether an address is a grpclb
+// load balancer (as opposed to a backend).
+#define GRPC_ARG_ADDRESS_IS_BALANCER "grpc.address_is_balancer"
+
+// Channel arg key for a string indicating an address's balancer name.
+#define GRPC_ARG_ADDRESS_BALANCER_NAME "grpc.address_balancer_name"
+
+namespace grpc_core {
+
+//
+// ServerAddress
+//
+
+// A server address is a grpc_resolved_address with an associated set of
+// channel args.  Any args present here will be merged into the channel
+// args when a subchannel is created for this address.
+class ServerAddress {
+ public:
+  // Takes ownership of args.
+  ServerAddress(const grpc_resolved_address& address, grpc_channel_args* args);
+  ServerAddress(const void* address, size_t address_len,
+                grpc_channel_args* args);
+
+  ~ServerAddress() { grpc_channel_args_destroy(args_); }
+
+  // Copyable.
+  ServerAddress(const ServerAddress& other)
+      : address_(other.address_), args_(grpc_channel_args_copy(other.args_)) {}
+  ServerAddress& operator=(const ServerAddress& other) {
+    address_ = other.address_;
+    grpc_channel_args_destroy(args_);
+    args_ = grpc_channel_args_copy(other.args_);
+    return *this;
+  }
+
+  // Movable.
+  ServerAddress(ServerAddress&& other)
+      : address_(other.address_), args_(other.args_) {
+    other.args_ = nullptr;
+  }
+  ServerAddress& operator=(ServerAddress&& other) {
+    address_ = other.address_;
+    args_ = other.args_;
+    other.args_ = nullptr;
+    return *this;
+  }
+
+  bool operator==(const ServerAddress& other) const { return Cmp(other) == 0; }
+
+  int Cmp(const ServerAddress& other) const;
+
+  const grpc_resolved_address& address() const { return address_; }
+  const grpc_channel_args* args() const { return args_; }
+
+  bool IsBalancer() const;
+
+ private:
+  grpc_resolved_address address_;
+  grpc_channel_args* args_;
+};
+
+//
+// ServerAddressList
+//
+
+typedef InlinedVector<ServerAddress, 1> ServerAddressList;
+
+// Returns a channel arg containing \a addresses.
+grpc_arg CreateServerAddressListChannelArg(const ServerAddressList* addresses);
+
+// Returns the ServerListAddress instance in channel_args or NULL.
+ServerAddressList* FindServerAddressListChannelArg(
+    const grpc_channel_args* channel_args);
+
+}  // namespace grpc_core
+
+#endif /* GRPC_CORE_EXT_FILTERS_CLIENT_CHANNEL_SERVER_ADDRESS_H */