Index: Src/GoogleApis.Auth/OAuth2/Responses/TokenErrorResponse.cs
===================================================================
new file mode 100644
--- /dev/null
+++ b/Src/GoogleApis.Auth/OAuth2/Responses/TokenErrorResponse.cs
@@ -0,0 +1,63 @@
+/*
+Copyright 2013 Google Inc
+
+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.
+*/
+
+namespace Google.Apis.Auth.OAuth2.Responses
+{
+    /// <summary>
+    /// OAuth 2.0 model for a unsuccessful access token response as specified in 
+    /// http://tools.ietf.org/html/rfc6749#section-5.2.
+    /// </summary>
+    public class TokenErrorResponse
+    {
+        /// <summary>
+        /// Gets or sets error code (e.g. "invalid_request", "invalid_client", "invalid_grant", "unauthorized_client", 
+        /// "unsupported_grant_type", "invalid_scope") as specified in http://tools.ietf.org/html/rfc6749#section-5.2.
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("error")]
+        public string Error { get; set; }
+
+        /// <summary>
+        /// Gets or sets a human-readable text which provides additional information used to assist the client 
+        /// developer in understanding the error occurred.
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("error_description")]
+        public string ErrorDescription { get; set; }
+
+        /// <summary>
+        /// Gets or sets the URI identifying a human-readable web page with provides information about the error.
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("error_uri")]
+        public string ErrorUri { get; set; }
+
+        public override string ToString()
+        {
+            return string.Format("Error:\"{0}\", Description:\"{1}\", Uri:\"{2}\"", Error, ErrorDescription, ErrorUri);
+        }
+
+        /// <summary>Constructs a new empty token error response.</summary>
+        public TokenErrorResponse()
+        {
+        }
+
+        /// <summary>Constructs a new token error response from the given authorization code response.</summary>
+        public TokenErrorResponse(AuthorizationCodeResponseUrl authorizationCode)
+        {
+            Error = authorizationCode.Error;
+            ErrorDescription = authorizationCode.ErrorDescription;
+            ErrorUri = authorizationCode.ErrorUri;
+        }
+    }
+}