diff --git a/google/devtools/clouderrorreporting/README.md b/google/devtools/clouderrorreporting/README.md
new file mode 100644
index 000000000..3edcebe6f
--- /dev/null
+++ b/google/devtools/clouderrorreporting/README.md
@@ -0,0 +1 @@
+Read more about the Stackdriver Error Reporting API [here](https://cloud.google.com/error-reporting/reference/)
diff --git a/google/devtools/clouderrorreporting/v1beta1/common.proto b/google/devtools/clouderrorreporting/v1beta1/common.proto
new file mode 100644
index 000000000..0dca1cc62
--- /dev/null
+++ b/google/devtools/clouderrorreporting/v1beta1/common.proto
@@ -0,0 +1,154 @@
+// Copyright 2016 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.
+
+syntax = "proto3";
+
+package google.devtools.clouderrorreporting.v1beta1;
+
+import "google/api/annotations.proto";
+import "google/protobuf/timestamp.proto";
+
+option java_multiple_files = true;
+option java_outer_classname = "CommonProto";
+option java_package = "com.google.devtools.clouderrorreporting.v1beta1";
+
+
+// Description of a group of similar error events.
+message ErrorGroup {
+  // The group resource name.
+  // Example: <code>projects/my-project-123/groups/my-groupid</code>
+  string name = 1;
+
+  // Group IDs are unique for a given project. If the same kind of error
+  // occurs in different service contexts, it will receive the same group ID.
+  string group_id = 2;
+
+  // Associated tracking issues.
+  repeated TrackingIssue tracking_issues = 3;
+}
+
+// Information related to tracking the progress on resolving the error.
+message TrackingIssue {
+  // A URL pointing to a related entry in an issue tracking system.
+  // Example: https://github.com/user/project/issues/4
+  string url = 1;
+}
+
+// An error event which is returned by the Error Reporting system.
+message ErrorEvent {
+  // Time when the event occurred as provided in the error report.
+  // If the report did not contain a timestamp, the time the error was received
+  // by the Error Reporting system is used.
+  google.protobuf.Timestamp event_time = 1;
+
+  // The `ServiceContext` for which this error was reported.
+  ServiceContext service_context = 2;
+
+  // The stack trace that was reported or logged by the service.
+  string message = 3;
+
+  // Data about the context in which the error occurred.
+  ErrorContext context = 5;
+}
+
+// Describes a running service that sends errors.
+// Its version changes over time and multiple versions can run in parallel.
+message ServiceContext {
+  // An identifier of the service, such as the name of the
+  // executable, job, or Google App Engine service name. This field is expected
+  // to have a low number of values that are relatively stable over time, as
+  // opposed to `version`, which can be changed whenever new code is deployed.
+  //
+  // Contains the service name for error reports extracted from Google
+  // App Engine logs or `default` if the App Engine default service is used.
+  string service = 2;
+
+  // Represents the source code version that the developer provided,
+  // which could represent a version label or a Git SHA-1 hash, for example.
+  string version = 3;
+}
+
+// A description of the context in which an error occurred.
+// This data should be provided by the application when reporting an error,
+// unless the
+// error report has been generated automatically from Google App Engine logs.
+message ErrorContext {
+  // The HTTP request which was processed when the error was
+  // triggered.
+  HttpRequestContext http_request = 1;
+
+  // The user who caused or was affected by the crash.
+  // This can be a user ID, an email address, or an arbitrary token that
+  // uniquely identifies the user.
+  // When sending an error report, leave this field empty if the user was not
+  // logged in. In this case the
+  // Error Reporting system will use other data, such as remote IP address, to
+  // distinguish affected users. See `affected_users_count` in
+  // `ErrorGroupStats`.
+  string user = 2;
+
+  // The location in the source code where the decision was made to
+  // report the error, usually the place where it was logged.
+  // For a logged exception this would be the source line where the
+  // exception is logged, usually close to the place where it was
+  // caught. This value is in contrast to `Exception.cause_location`,
+  // which describes the source line where the exception was thrown.
+  SourceLocation report_location = 3;
+}
+
+// HTTP request data that is related to a reported error.
+// This data should be provided by the application when reporting an error,
+// unless the
+// error report has been generated automatically from Google App Engine logs.
+message HttpRequestContext {
+  // The type of HTTP request, such as `GET`, `POST`, etc.
+  string method = 1;
+
+  // The URL of the request.
+  string url = 2;
+
+  // The user agent information that is provided with the request.
+  string user_agent = 3;
+
+  // The referrer information that is provided with the request.
+  string referrer = 4;
+
+  // The HTTP response status code for the request.
+  int32 response_status_code = 5;
+
+  // The IP address from which the request originated.
+  // This can be IPv4, IPv6, or a token which is derived from the
+  // IP address, depending on the data that has been provided
+  // in the error report.
+  string remote_ip = 6;
+}
+
+// Indicates a location in the source code of the service for which
+// errors are reported.
+// This data should be provided by the application when reporting an error,
+// unless the error report has been generated automatically from Google App
+// Engine logs. All fields are optional.
+message SourceLocation {
+  // The source code filename, which can include a truncated relative
+  // path, or a full path from a production machine.
+  string file_path = 1;
+
+  // 1-based. 0 indicates that the line number is unknown.
+  int32 line_number = 2;
+
+  // Human-readable name of a function or method.
+  // The value can include optional context like the class or package name.
+  // For example, `my.package.MyClass.method` in case of Java.
+  string function_name = 4;
+}
diff --git a/google/devtools/clouderrorreporting/v1beta1/error_group_service.proto b/google/devtools/clouderrorreporting/v1beta1/error_group_service.proto
new file mode 100644
index 000000000..6501ed8c8
--- /dev/null
+++ b/google/devtools/clouderrorreporting/v1beta1/error_group_service.proto
@@ -0,0 +1,58 @@
+// Copyright 2016 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.
+
+syntax = "proto3";
+
+package google.devtools.clouderrorreporting.v1beta1;
+
+import "google/api/annotations.proto";
+import "google/devtools/clouderrorreporting/v1beta1/common.proto";
+
+option java_multiple_files = true;
+option java_outer_classname = "ErrorGroupServiceProto";
+option java_package = "com.google.devtools.clouderrorreporting.v1beta1";
+
+
+// Service for retrieving and updating individual error groups.
+service ErrorGroupService {
+  // Get the specified group.
+  rpc GetGroup(GetGroupRequest) returns (ErrorGroup) {
+    option (google.api.http) = { get: "/v1beta1/{group_name=projects/*/groups/*}" };
+  }
+
+  // Replace the data for the specified group.
+  // Fails if the group does not exist.
+  rpc UpdateGroup(UpdateGroupRequest) returns (ErrorGroup) {
+    option (google.api.http) = { put: "/v1beta1/{group.name=projects/*/groups/*}" body: "group" };
+  }
+}
+
+// A request to return an individual group.
+message GetGroupRequest {
+  // [Required] The group resource name. Written as
+  // <code>projects/<var>projectID</var>/groups/<var>group_name</var></code>.
+  // Call
+  // <a href="/error-reporting/reference/rest/v1beta1/projects.groupStats/list">
+  // <code>groupStats.list</code></a> to return a list of groups belonging to
+  // this project.
+  //
+  // Example: <code>projects/my-project-123/groups/my-group</code>
+  string group_name = 1;
+}
+
+// A request to replace the existing data for the given group.
+message UpdateGroupRequest {
+  // [Required] The group which replaces the resource on the server.
+  ErrorGroup group = 1;
+}
diff --git a/google/devtools/clouderrorreporting/v1beta1/error_stats_service.proto b/google/devtools/clouderrorreporting/v1beta1/error_stats_service.proto
new file mode 100644
index 000000000..b58836f48
--- /dev/null
+++ b/google/devtools/clouderrorreporting/v1beta1/error_stats_service.proto
@@ -0,0 +1,323 @@
+// Copyright 2016 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.
+
+syntax = "proto3";
+
+package google.devtools.clouderrorreporting.v1beta1;
+
+import "google/api/annotations.proto";
+import "google/devtools/clouderrorreporting/v1beta1/common.proto";
+import "google/protobuf/duration.proto";
+import "google/protobuf/timestamp.proto";
+
+option java_multiple_files = true;
+option java_outer_classname = "ErrorStatsServiceProto";
+option java_package = "com.google.devtools.clouderrorreporting.v1beta1";
+
+
+// An API for retrieving and managing error statistics as well as data for
+// individual events.
+service ErrorStatsService {
+  // Lists the specified groups.
+  rpc ListGroupStats(ListGroupStatsRequest) returns (ListGroupStatsResponse) {
+    option (google.api.http) = { get: "/v1beta1/{project_name=projects/*}/groupStats" };
+  }
+
+  // Lists the specified events.
+  rpc ListEvents(ListEventsRequest) returns (ListEventsResponse) {
+    option (google.api.http) = { get: "/v1beta1/{project_name=projects/*}/events" };
+  }
+
+  // Deletes all error events of a given project.
+  rpc DeleteEvents(DeleteEventsRequest) returns (DeleteEventsResponse) {
+    option (google.api.http) = { delete: "/v1beta1/{project_name=projects/*}/events" };
+  }
+}
+
+// Specifies a set of `ErrorGroupStats` to return.
+message ListGroupStatsRequest {
+  // [Required] The resource name of the Google Cloud Platform project. Written
+  // as <code>projects/</code> plus the
+  // <a href="https://support.google.com/cloud/answer/6158840">Google Cloud
+  // Platform project ID</a>.
+  //
+  // Example: <code>projects/my-project-123</code>.
+  string project_name = 1;
+
+  // [Optional] List all <code>ErrorGroupStats</code> with these IDs.
+  // If not specified, all error group stats with a non-zero error count
+  // for the given selection criteria are returned.
+  repeated string group_id = 2;
+
+  // [Optional] List only <code>ErrorGroupStats</code> which belong to a service
+  // context that matches the filter.
+  // Data for all service contexts is returned if this field is not specified.
+  ServiceContextFilter service_filter = 3;
+
+  // [Required] List data for the given time range.
+  // The service is tuned for retrieving data up to (approximately) 'now'.
+  // Retrieving data for arbitrary time periods in the past can result in
+  // higher response times or in returning incomplete results.
+  QueryTimeRange time_range = 5;
+
+  // [Optional] The preferred duration for a single returned `TimedCount`.
+  // If not set, no timed counts are returned.
+  google.protobuf.Duration timed_count_duration = 6;
+
+  // [Optional] The alignment of the timed counts to be returned.
+  // Default is `ALIGNMENT_EQUAL_AT_END`.
+  TimedCountAlignment alignment = 7;
+
+  // [Optional] Time where the timed counts shall be aligned if rounded
+  // alignment is chosen. Default is 00:00 UTC.
+  google.protobuf.Timestamp alignment_time = 8;
+
+  // [Optional] The sort order in which the results are returned.
+  // Default is `COUNT_DESC`.
+  ErrorGroupOrder order = 9;
+
+  // [Optional] The maximum number of results to return per response.
+  // Default is 20.
+  int32 page_size = 11;
+
+  // [Optional] A `next_page_token` provided by a previous response. To view
+  // additional results, pass this token along with the identical query
+  // parameters as the first request.
+  string page_token = 12;
+}
+
+// Contains a set of requested error group stats.
+message ListGroupStatsResponse {
+  // The error group stats which match the given request.
+  repeated ErrorGroupStats error_group_stats = 1;
+
+  // If non-empty, more results are available.
+  // Pass this token, along with the same query parameters as the first
+  // request, to view the next page of results.
+  string next_page_token = 2;
+}
+
+// Data extracted for a specific group based on certain selection criteria,
+// such as a given time period and/or service filter.
+message ErrorGroupStats {
+  // Group data that is independent of the selection criteria.
+  ErrorGroup group = 1;
+
+  // Approximate total number of events in the given group that match
+  // the selection criteria.
+  int64 count = 2;
+
+  // Approximate number of affected users in the given group that
+  // match the selection criteria.
+  // Users are distinguished by data in the `ErrorContext` of the
+  // individual error events, such as their login name or their remote
+  // IP address in case of HTTP requests.
+  // The number of affected users can be zero even if the number of
+  // errors is non-zero if no data was provided from which the
+  // affected user could be deduced.
+  // Users are counted based on data in the request
+  // context that was provided in the error report. If more users are
+  // implicitly affected, such as due to a crash of the whole service,
+  // this is not reflected here.
+  int64 affected_users_count = 3;
+
+  // Approximate number of occurrences over time.
+  // Timed counts returned by ListGroups are guaranteed to be:
+  //
+  // - Inside the requested time interval
+  // - Non-overlapping, and
+  // - Ordered by ascending time.
+  repeated TimedCount timed_counts = 4;
+
+  // Approximate first occurrence that was seen for this group and
+  // which matches the given selection criteria.
+  google.protobuf.Timestamp first_seen_time = 5;
+
+  // Approximate last occurrence that was seen for this group
+  // and which matches the given selection criteria.
+  google.protobuf.Timestamp last_seen_time = 6;
+
+  // Service contexts with a non-zero error count for the given selection
+  // criteria. This list can be truncated if multiple services are affected.
+  // Refer to `num_affected_services` for the total count.
+  repeated ServiceContext affected_services = 7;
+
+  // The total number of services with a non-zero error count for the given
+  // selection criteria.
+  int32 num_affected_services = 8;
+
+  // An arbitrary event that is chosen as representative for the whole group.
+  // The representative event is intended to be used as a quick preview for
+  // the whole group. Events in the group are usually sufficiently similar
+  // to each other such that showing an arbitrary representative provides
+  // insight into the characteristics of the group as a whole.
+  ErrorEvent representative = 9;
+}
+
+// The number of errors in a given time period.
+// All numbers are approximate since the error events are sampled
+// before counting them.
+message TimedCount {
+  // Approximate number of occurrences in the given time period.
+  int64 count = 1;
+
+  // Start of the time period to which `count` refers (included).
+  google.protobuf.Timestamp start_time = 2;
+
+  // End of the time period to which `count` refers (excluded).
+  google.protobuf.Timestamp end_time = 3;
+}
+
+// Specifies a set of error events to return.
+message ListEventsRequest {
+  // [Required] The resource name of the Google Cloud Platform project. Written
+  // as `projects/` plus the
+  // [Google Cloud Platform project ID](https://support.google.com/cloud/answer/6158840).
+  // Example: `projects/my-project-123`.
+  string project_name = 1;
+
+  // [Required] The group for which events shall be returned.
+  string group_id = 2;
+
+  // [Optional] List only ErrorGroups which belong to a service context that
+  // matches the filter.
+  // Data for all service contexts is returned if this field is not specified.
+  ServiceContextFilter service_filter = 3;
+
+  // [Optional] List only data for the given time range.
+  // The service is tuned for retrieving data up to (approximately) 'now'.
+  // Retrieving data for arbitrary time periods in the past can result in
+  // higher response times or in returning incomplete results.
+  // Data for the last hour until now is returned if not specified.
+  QueryTimeRange time_range = 4;
+
+  // [Optional] The maximum number of results to return per response.
+  int32 page_size = 6;
+
+  // [Optional] A `next_page_token` provided by a previous response.
+  string page_token = 7;
+}
+
+// Contains a set of requested error events.
+message ListEventsResponse {
+  // The error events which match the given request.
+  repeated ErrorEvent error_events = 1;
+
+  // If non-empty, more results are available.
+  // Pass this token, along with the same query parameters as the first
+  // request, to view the next page of results.
+  string next_page_token = 2;
+}
+
+// Requests might be rejected or the resulting timed count durations might be
+// adjusted for lower durations.
+message QueryTimeRange {
+  // The supported time ranges.
+  enum Period {
+    // Do not use.
+    PERIOD_UNSPECIFIED = 0;
+
+    // Retrieve data for the last hour.
+    // Recommended minimum timed count duration: 1 min.
+    PERIOD_1_HOUR = 1;
+
+    // Retrieve data for the last 6 hours.
+    // Recommended minimum timed count duration: 10 min.
+    PERIOD_6_HOURS = 2;
+
+    // Retrieve data for the last day.
+    // Recommended minimum timed count duration: 1 hour.
+    PERIOD_1_DAY = 3;
+
+    // Retrieve data for the last week.
+    // Recommended minimum timed count duration: 6 hours.
+    PERIOD_1_WEEK = 4;
+
+    // Retrieve data for the last 30 days.
+    // Recommended minimum timed count duration: 1 day.
+    PERIOD_30_DAYS = 5;
+  }
+
+  // Restricts the query to the specified time range.
+  Period period = 1;
+}
+
+// Specifies criteria for filtering a subset of service contexts.
+// The fields in the filter correspond to the fields in `ServiceContext`.
+// Only exact, case-sensitive matches are supported.
+// If a field is unset or empty, it matches arbitrary values.
+message ServiceContextFilter {
+  // [Optional] The exact value to match against
+  // [`ServiceContext.service`](/error-reporting/reference/rest/v1beta1/ServiceContext#FIELDS.service).
+  string service = 2;
+
+  // [Optional] The exact value to match against
+  // [`ServiceContext.version`](/error-reporting/reference/rest/v1beta1/ServiceContext#FIELDS.version).
+  string version = 3;
+}
+
+// Deletes all events in the project.
+message DeleteEventsRequest {
+  // [Required] The resource name of the Google Cloud Platform project. Written
+  // as `projects/` plus the
+  // [Google Cloud Platform project ID](https://support.google.com/cloud/answer/6158840).
+  // Example: `projects/my-project-123`.
+  string project_name = 1;
+}
+
+// Response message for deleting error events.
+message DeleteEventsResponse {
+
+}
+
+// Specifies how the time periods of error group counts are aligned.
+enum TimedCountAlignment {
+  // No alignment specified.
+  ERROR_COUNT_ALIGNMENT_UNSPECIFIED = 0;
+
+  // The time periods shall be consecutive, have width equal to the
+  // requested duration, and be aligned at the `alignment_time` provided in
+  // the request.
+  // The `alignment_time` does not have to be inside the query period but
+  // even if it is outside, only time periods are returned which overlap
+  // with the query period.
+  // A rounded alignment will typically result in a
+  // different size of the first or the last time period.
+  ALIGNMENT_EQUAL_ROUNDED = 1;
+
+  // The time periods shall be consecutive, have width equal to the
+  // requested duration, and be aligned at the end of the requested time
+  // period. This can result in a different size of the
+  // first time period.
+  ALIGNMENT_EQUAL_AT_END = 2;
+}
+
+// A sorting order of error groups.
+enum ErrorGroupOrder {
+  // No group order specified.
+  GROUP_ORDER_UNSPECIFIED = 0;
+
+  // Total count of errors in the given time window in descending order.
+  COUNT_DESC = 1;
+
+  // Timestamp when the group was last seen in the given time window
+  // in descending order.
+  LAST_SEEN_DESC = 2;
+
+  // Timestamp when the group was created in descending order.
+  CREATED_DESC = 3;
+
+  // Number of affected users in the given time window in descending order.
+  AFFECTED_USERS_DESC = 4;
+}
diff --git a/google/devtools/clouderrorreporting/v1beta1/report_errors_service.proto b/google/devtools/clouderrorreporting/v1beta1/report_errors_service.proto
new file mode 100644
index 000000000..025360d31
--- /dev/null
+++ b/google/devtools/clouderrorreporting/v1beta1/report_errors_service.proto
@@ -0,0 +1,79 @@
+// Copyright 2016 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.
+
+syntax = "proto3";
+
+package google.devtools.clouderrorreporting.v1beta1;
+
+import "google/api/annotations.proto";
+import "google/devtools/clouderrorreporting/v1beta1/common.proto";
+import "google/protobuf/timestamp.proto";
+
+option java_multiple_files = true;
+option java_outer_classname = "ReportErrorsServiceProto";
+option java_package = "com.google.devtools.clouderrorreporting.v1beta1";
+
+
+// An API for reporting error events.
+service ReportErrorsService {
+  // Report an individual error event.
+  //
+  // This endpoint accepts <strong>either</strong> an OAuth token,
+  // <strong>or</strong> an
+  // <a href="https://support.google.com/cloud/answer/6158862">API key</a>
+  // for authentication. To use an API key, append it to the URL as the value of
+  // a `key` parameter. For example:
+  // <pre>POST https://clouderrorreporting.googleapis.com/v1beta1/projects/example-project/events:report?key=123ABC456</pre>
+  rpc ReportErrorEvent(ReportErrorEventRequest) returns (ReportErrorEventResponse) {
+    option (google.api.http) = { post: "/v1beta1/{project_name=projects/*}/events:report" body: "event" };
+  }
+}
+
+// A request for reporting an individual error event.
+message ReportErrorEventRequest {
+  // [Required] The resource name of the Google Cloud Platform project. Written
+  // as `projects/` plus the
+  // [Google Cloud Platform project ID](https://support.google.com/cloud/answer/6158840).
+  // Example: `projects/my-project-123`.
+  string project_name = 1;
+
+  // [Required] The error event to be reported.
+  ReportedErrorEvent event = 2;
+}
+
+// Response for reporting an individual error event.
+// Data may be added to this message in the future.
+message ReportErrorEventResponse {
+
+}
+
+// An error event which is reported to the Error Reporting system.
+message ReportedErrorEvent {
+  // [Optional] Time when the event occurred.
+  // If not provided, the time when the event was received by the
+  // Error Reporting system will be used.
+  google.protobuf.Timestamp event_time = 1;
+
+  // [Required] The service context in which this error has occurred.
+  ServiceContext service_context = 2;
+
+  // [Required] A message describing the error. The message can contain an
+  // exception stack in one of the supported programming languages and formats.
+  // In that case, the message is parsed and detailed exception information
+  // is returned when retrieving the error event again.
+  string message = 3;
+
+  // [Optional] A description of the context in which the error occurred.
+  ErrorContext context = 4;
+}