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diff --git a/chromeos/dbus/nfc_tag_client.h b/chromeos/dbus/nfc_tag_client.h
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+++ b/chromeos/dbus/nfc_tag_client.h
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+// Copyright 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROMEOS_DBUS_NFC_TAG_CLIENT_H_
+#define CHROMEOS_DBUS_NFC_TAG_CLIENT_H_
+
+#include <map>
+#include <string>
+#include <vector>
+
+#include "chromeos/chromeos_export.h"
+#include "chromeos/dbus/dbus_client.h"
+#include "chromeos/dbus/dbus_client_implementation_type.h"
+#include "chromeos/dbus/nfc_client_helpers.h"
+#include "chromeos/dbus/nfc_property_set.h"
+#include "dbus/object_path.h"
+#include "dbus/object_proxy.h"
+#include "dbus/property.h"
+
+namespace chromeos {
+
+class NfcAdapterClient;
+
+// NfcTagClient is used to communicate with objects representing remote NFC
+// tags.
+class CHROMEOS_EXPORT NfcTagClient : public DBusClient {
+ public:
+  // Structure of properties associated with an NFC tag.
+  struct Properties : public NfcPropertySet {
+    // The NFC tag type. Possible values are "Type 1", "Type 2", "Type 3",
+    // and "Type 4".
+    dbus::Property<std::string> type;
+
+    // The NFC tag radio protocol. Possible values are "Felica", "MIFARE",
+    // "Jewel", "ISO-DEP", and "NFC-DEP".
+    dbus::Property<std::string> protocol;
+
+    // List of object paths for NDEF Records associated with the NFC tag.
+    dbus::Property<std::vector<dbus::ObjectPath> > records;
+
+    // The current status of the tag's read mode.
+    dbus::Property<bool> read_only;
+
+    Properties(dbus::ObjectProxy* object_proxy,
+               const PropertyChangedCallback& callback);
+    virtual ~Properties();
+  };
+
+  // Interface for observing changes from a remote NFC tag.
+  class Observer {
+   public:
+    virtual ~Observer() {}
+
+    // Called when a remote NFC tag with the object path |object_path| is added
+    // to the set of known tags associated with the adapter with object path
+    // |adapter_path|.
+    virtual void TagFound(const dbus::ObjectPath& object_path,
+                          const dbus::ObjectPath& adapter_path) {}
+
+    // Called when a remote NFC tag with the object path |object_path| is
+    // removed from the set of known tags associated with the adapter with the
+    // object path |adapter_path|.
+    virtual void TagLost(const dbus::ObjectPath& object_path,
+                         const dbus::ObjectPath& adapter_path) {}
+
+    // Called when the tag property with the name |property_name| on tag with
+    // object path |object_path| has acquired a new value.
+    virtual void TagPropertyChanged(const dbus::ObjectPath& object_path,
+                                    const std::string& property_name) {}
+  };
+
+  // TODO(armansito): Move this typedef to the NFC Record client, once
+  // implemented.
+  typedef std::map<std::string, std::string> RecordAttributes;
+
+  virtual ~NfcTagClient();
+
+  // Adds and removes observers for events on all remote NFC tags. Check the
+  // |object_path| parameter of observer methods to determine which tag is
+  // issuing the event.
+  virtual void AddObserver(Observer* observer) = 0;
+  virtual void RemoveObserver(Observer* observer) = 0;
+
+  // Obtain the properties for the NFC tag with object path |object_path|; any
+  // values should be copied if needed.
+  virtual Properties* GetProperties(const dbus::ObjectPath& object_path) = 0;
+
+  // Creates an NDEF record for the NFC tag with object path |object_path|
+  // using the parameters in |attributes|. |attributes| is a dictionary,
+  // containing the NFC Record properties which will be assigned to the
+  // resulting record object and written to the tag. The properties are defined
+  // by the NFC Record interface (see namespace "nfc_record" in
+  // third_party/cros_system_api/dbus/service_constants.h and
+  // NfcRecordClient::Properties). |attributes| should at least contain a
+  // "Type" plus any other properties associated with that type. For example:
+  //
+  //    {
+  //      "Type": "Text",
+  //      "Encoding": "UTF-8",
+  //      "Language": "en",
+  //      "Representation": "Chrome OS rulez!"
+  //    },
+  //    {
+  //      "Type": "URI",
+  //      "URI": "http://www.chromium.org"
+  //    },
+  //    etc.
+  virtual void Write(
+      const dbus::ObjectPath& object_path,
+      const RecordAttributes& attributes,
+      const base::Closure& callback,
+      const nfc_client_helpers::ErrorCallback& error_callback) = 0;
+
+  // Creates the instance.
+  static NfcTagClient* Create(DBusClientImplementationType type,
+                              NfcAdapterClient* adapter_client);
+
+ protected:
+  friend class NfcClientTest;
+
+  NfcTagClient();
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(NfcTagClient);
+};
+
+}  // namespace chromeos
+
+#endif  // CHROMEOS_DBUS_NFC_TAG_CLIENT_H_