diff --git a/google/cloud/networkconnectivity/v1alpha1/BUILD.bazel b/google/cloud/networkconnectivity/v1alpha1/BUILD.bazel
new file mode 100644
index 00000000..526fe7c1
--- /dev/null
+++ b/google/cloud/networkconnectivity/v1alpha1/BUILD.bazel
@@ -0,0 +1,341 @@
+# This file was automatically generated by BuildFileGenerator
+# https://github.com/googleapis/gapic-generator/tree/master/rules_gapic/bazel
+
+# Most of the manual changes to this file will be overwritten.
+# It's **only** allowed to change the following rule attribute values:
+# - names of *_gapic_assembly_* rules
+# - certain parameters of *_gapic_library rules, including but not limited to:
+#    * extra_protoc_parameters
+#    * extra_protoc_file_parameters
+# The complete list of preserved parameters can be found in the source code.
+
+# This is an API workspace, having public visibility by default makes perfect sense.
+package(default_visibility = ["//visibility:public"])
+
+##############################################################################
+# Common
+##############################################################################
+load("@rules_proto//proto:defs.bzl", "proto_library")
+load("@com_google_googleapis_imports//:imports.bzl", "proto_library_with_info")
+
+proto_library(
+    name = "networkconnectivity_proto",
+    srcs = [
+        "common.proto",
+        "hub.proto",
+    ],
+    deps = [
+        "//google/api:annotations_proto",
+        "//google/api:client_proto",
+        "//google/api:field_behavior_proto",
+        "//google/api:resource_proto",
+        "//google/longrunning:operations_proto",
+        "@com_google_protobuf//:field_mask_proto",
+        "@com_google_protobuf//:timestamp_proto",
+    ],
+)
+
+proto_library_with_info(
+    name = "networkconnectivity_proto_with_info",
+    deps = [
+        ":networkconnectivity_proto",
+        "//google/cloud:common_resources_proto",
+    ],
+)
+
+##############################################################################
+# Java
+##############################################################################
+load(
+    "@com_google_googleapis_imports//:imports.bzl",
+    "java_gapic_assembly_gradle_pkg",
+    "java_gapic_library",
+    "java_gapic_test",
+    "java_grpc_library",
+    "java_proto_library",
+)
+
+java_proto_library(
+    name = "networkconnectivity_java_proto",
+    deps = [":networkconnectivity_proto"],
+)
+
+java_grpc_library(
+    name = "networkconnectivity_java_grpc",
+    srcs = [":networkconnectivity_proto"],
+    deps = [":networkconnectivity_java_proto"],
+)
+
+java_gapic_library(
+    name = "networkconnectivity_java_gapic",
+    srcs = [":networkconnectivity_proto_with_info"],
+    grpc_service_config = "networkconnectivity_grpc_service_config.json",
+    package = "google.cloud.networkconnectivity.v1alpha1",
+    test_deps = [
+        ":networkconnectivity_java_grpc",
+    ],
+    deps = [
+        ":networkconnectivity_java_proto",
+    ],
+)
+
+java_gapic_test(
+    name = "networkconnectivity_java_gapic_test_suite",
+    test_classes = [
+        
+    ],
+    runtime_deps = [":networkconnectivity_java_gapic_test"],
+)
+
+# Open Source Packages
+java_gapic_assembly_gradle_pkg(
+    name = "google-cloud-networkconnectivity-v1alpha1-java",
+    deps = [
+        ":networkconnectivity_java_gapic",
+        ":networkconnectivity_java_grpc",
+        ":networkconnectivity_java_proto",
+        ":networkconnectivity_proto",
+    ],
+)
+
+##############################################################################
+# Go
+##############################################################################
+load(
+    "@com_google_googleapis_imports//:imports.bzl",
+    "go_gapic_assembly_pkg",
+    "go_gapic_library",
+    "go_proto_library",
+    "go_test",
+)
+
+go_proto_library(
+    name = "networkconnectivity_go_proto",
+    compilers = ["@io_bazel_rules_go//proto:go_grpc"],
+    importpath = "google.golang.org/genproto/googleapis/cloud/networkconnectivity/v1alpha1",
+    protos = [":networkconnectivity_proto"],
+    deps = [
+        "//google/api:annotations_go_proto",
+        "//google/longrunning:longrunning_go_proto",
+    ],
+)
+
+go_gapic_library(
+    name = "networkconnectivity_go_gapic",
+    srcs = [":networkconnectivity_proto_with_info"],
+    grpc_service_config = "networkconnectivity_grpc_service_config.json",
+    importpath = "cloud.google.com/go/networkconnectivity/apiv1alpha1;networkconnectivity",
+    service_yaml = "networkconnectivity_v1alpha1.yaml",
+    deps = [
+        ":networkconnectivity_go_proto",
+        "//google/longrunning:longrunning_go_proto",
+        "@com_google_cloud_go//longrunning/autogen:go_default_library",
+        "@com_google_cloud_go//longrunning:go_default_library",
+    ],
+)
+
+go_test(
+    name = "networkconnectivity_go_gapic_test",
+    srcs = [":networkconnectivity_go_gapic_srcjar_test"],
+    embed = [":networkconnectivity_go_gapic"],
+    importpath = "cloud.google.com/go/networkconnectivity/apiv1alpha1",
+)
+
+# Open Source Packages
+go_gapic_assembly_pkg(
+    name = "gapi-cloud-networkconnectivity-v1alpha1-go",
+    deps = [
+        ":networkconnectivity_go_gapic",
+        ":networkconnectivity_go_gapic_srcjar-test.srcjar",
+        ":networkconnectivity_go_proto",
+    ],
+)
+
+##############################################################################
+# Python
+##############################################################################
+load(
+    "@com_google_googleapis_imports//:imports.bzl",
+    "py_gapic_assembly_pkg",
+    "py_gapic_library",
+)
+
+py_gapic_library(
+    name = "networkconnectivity_py_gapic",
+    srcs = [":networkconnectivity_proto"],
+    grpc_service_config = "networkconnectivity_grpc_service_config.json",
+)
+
+# Open Source Packages
+py_gapic_assembly_pkg(
+    name = "networkconnectivity-v1alpha1-py",
+    deps = [
+        ":networkconnectivity_py_gapic",
+    ],
+)
+
+##############################################################################
+# PHP
+##############################################################################
+load(
+    "@com_google_googleapis_imports//:imports.bzl",
+    "php_gapic_assembly_pkg",
+    "php_gapic_library",
+    "php_grpc_library",
+    "php_proto_library",
+)
+
+php_proto_library(
+    name = "networkconnectivity_php_proto",
+    deps = [":networkconnectivity_proto"],
+)
+
+php_grpc_library(
+    name = "networkconnectivity_php_grpc",
+    srcs = [":networkconnectivity_proto"],
+    deps = [":networkconnectivity_php_proto"],
+)
+
+php_gapic_library(
+    name = "networkconnectivity_php_gapic",
+    src = ":networkconnectivity_proto_with_info",
+    gapic_yaml = "networkconnectivity_gapic.yaml",
+    grpc_service_config = "networkconnectivity_grpc_service_config.json",
+    package = "google.cloud.networkconnectivity.v1alpha1",
+    service_yaml = "networkconnectivity_v1alpha1.yaml",
+    deps = [
+        ":networkconnectivity_php_grpc",
+        ":networkconnectivity_php_proto",
+    ],
+)
+
+# Open Source Packages
+php_gapic_assembly_pkg(
+    name = "google-cloud-networkconnectivity-v1alpha1-php",
+    deps = [
+        ":networkconnectivity_php_gapic",
+        ":networkconnectivity_php_grpc",
+        ":networkconnectivity_php_proto",
+    ],
+)
+
+##############################################################################
+# Node.js
+##############################################################################
+load(
+    "@com_google_googleapis_imports//:imports.bzl",
+    "nodejs_gapic_assembly_pkg",
+    "nodejs_gapic_library",
+)
+
+nodejs_gapic_library(
+    name = "networkconnectivity_nodejs_gapic",
+    package_name = "@google-cloud/networkconnectivity",
+    src = ":networkconnectivity_proto_with_info",
+    extra_protoc_parameters = ["metadata"],
+    grpc_service_config = "networkconnectivity_grpc_service_config.json",
+    package = "google.cloud.networkconnectivity.v1alpha1",
+    service_yaml = "networkconnectivity_v1alpha1.yaml",
+    deps = [],
+)
+
+nodejs_gapic_assembly_pkg(
+    name = "networkconnectivity-v1alpha1-nodejs",
+    deps = [
+        ":networkconnectivity_nodejs_gapic",
+        ":networkconnectivity_proto",
+    ],
+)
+
+##############################################################################
+# Ruby
+##############################################################################
+load(
+    "@com_google_googleapis_imports//:imports.bzl",
+    "ruby_gapic_assembly_pkg",
+    "ruby_gapic_library",
+    "ruby_grpc_library",
+    "ruby_proto_library",
+)
+
+ruby_proto_library(
+    name = "networkconnectivity_ruby_proto",
+    deps = [":networkconnectivity_proto"],
+)
+
+ruby_grpc_library(
+    name = "networkconnectivity_ruby_grpc",
+    srcs = [":networkconnectivity_proto"],
+    deps = [":networkconnectivity_ruby_proto"],
+)
+
+ruby_gapic_library(
+    name = "networkconnectivity_ruby_gapic",
+    src = ":networkconnectivity_proto_with_info",
+    gapic_yaml = "networkconnectivity_gapic.yaml",
+    grpc_service_config = "networkconnectivity_grpc_service_config.json",
+    package = "google.cloud.networkconnectivity.v1alpha1",
+    service_yaml = "networkconnectivity_v1alpha1.yaml",
+    deps = [
+        ":networkconnectivity_ruby_grpc",
+        ":networkconnectivity_ruby_proto",
+    ],
+)
+
+# Open Source Packages
+ruby_gapic_assembly_pkg(
+    name = "google-cloud-networkconnectivity-v1alpha1-ruby",
+    deps = [
+        ":networkconnectivity_ruby_gapic",
+        ":networkconnectivity_ruby_grpc",
+        ":networkconnectivity_ruby_proto",
+    ],
+)
+
+##############################################################################
+# C#
+##############################################################################
+load(
+    "@com_google_googleapis_imports//:imports.bzl",
+    "csharp_gapic_assembly_pkg",
+    "csharp_gapic_library",
+    "csharp_grpc_library",
+    "csharp_proto_library",
+)
+
+csharp_proto_library(
+    name = "networkconnectivity_csharp_proto",
+    deps = [":networkconnectivity_proto"],
+)
+
+csharp_grpc_library(
+    name = "networkconnectivity_csharp_grpc",
+    srcs = [":networkconnectivity_proto"],
+    deps = [":networkconnectivity_csharp_proto"],
+)
+
+csharp_gapic_library(
+    name = "networkconnectivity_csharp_gapic",
+    srcs = [":networkconnectivity_proto_with_info"],
+    common_resources_config = "@gax_dotnet//:Google.Api.Gax/ResourceNames/CommonResourcesConfig.json",
+    grpc_service_config = "networkconnectivity_grpc_service_config.json",
+    deps = [
+        ":networkconnectivity_csharp_grpc",
+        ":networkconnectivity_csharp_proto",
+    ],
+)
+
+# Open Source Packages
+csharp_gapic_assembly_pkg(
+    name = "google-cloud-networkconnectivity-v1alpha1-csharp",
+    deps = [
+        ":networkconnectivity_csharp_gapic",
+        ":networkconnectivity_csharp_grpc",
+        ":networkconnectivity_csharp_proto",
+    ],
+)
+
+##############################################################################
+# C++
+##############################################################################
+# Put your C++ rules here
diff --git a/google/cloud/networkconnectivity/v1alpha1/common.proto b/google/cloud/networkconnectivity/v1alpha1/common.proto
new file mode 100644
index 00000000..fbf806af
--- /dev/null
+++ b/google/cloud/networkconnectivity/v1alpha1/common.proto
@@ -0,0 +1,53 @@
+// Copyright 2020 Google LLC
+//
+// 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.cloud.networkconnectivity.v1alpha1;
+
+import "google/api/field_behavior.proto";
+import "google/protobuf/timestamp.proto";
+import "google/api/annotations.proto";
+
+option go_package = "google.golang.org/genproto/googleapis/cloud/networkconnectivity/v1alpha1;networkconnectivity";
+option java_multiple_files = true;
+option java_outer_classname = "CommonProto";
+option java_package = "com.google.cloud.networkconnectivity.v1alpha1";
+
+// Represents the metadata of the long-running operation.
+message OperationMetadata {
+  // Output only. The time the operation was created.
+  google.protobuf.Timestamp create_time = 1 [(google.api.field_behavior) = OUTPUT_ONLY];
+
+  // Output only. The time the operation finished running.
+  google.protobuf.Timestamp end_time = 2 [(google.api.field_behavior) = OUTPUT_ONLY];
+
+  // Output only. Server-defined resource path for the target of the operation.
+  string target = 3 [(google.api.field_behavior) = OUTPUT_ONLY];
+
+  // Output only. Name of the verb executed by the operation.
+  string verb = 4 [(google.api.field_behavior) = OUTPUT_ONLY];
+
+  // Output only. Human-readable status of the operation, if any.
+  string status_message = 5 [(google.api.field_behavior) = OUTPUT_ONLY];
+
+  // Output only. Identifies whether the user has requested cancellation
+  // of the operation. Operations that have successfully been cancelled
+  // have [Operation.error][] value with a [google.rpc.Status.code][google.rpc.Status.code] of 1,
+  // corresponding to `Code.CANCELLED`.
+  bool requested_cancellation = 6 [(google.api.field_behavior) = OUTPUT_ONLY];
+
+  // Output only. API version used to start the operation.
+  string api_version = 7 [(google.api.field_behavior) = OUTPUT_ONLY];
+}
diff --git a/google/cloud/networkconnectivity/v1alpha1/hub.proto b/google/cloud/networkconnectivity/v1alpha1/hub.proto
new file mode 100644
index 00000000..970559cb
--- /dev/null
+++ b/google/cloud/networkconnectivity/v1alpha1/hub.proto
@@ -0,0 +1,525 @@
+// Copyright 2020 Google LLC
+//
+// 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.cloud.networkconnectivity.v1alpha1;
+
+import "google/api/annotations.proto";
+import "google/api/client.proto";
+import "google/api/field_behavior.proto";
+import "google/api/resource.proto";
+import "google/longrunning/operations.proto";
+import "google/protobuf/field_mask.proto";
+import "google/protobuf/timestamp.proto";
+
+option go_package = "google.golang.org/genproto/googleapis/cloud/networkconnectivity/v1alpha1;networkconnectivity";
+option java_multiple_files = true;
+option java_outer_classname = "HubProto";
+option java_package = "com.google.cloud.networkconnectivity.v1alpha1";
+option (google.api.resource_definition) = {
+  type: "compute.googleapis.com/VpnTunnel"
+  pattern: "projects/{project}/regions/{region}/vpnTunnels/{resource_id}"
+};
+option (google.api.resource_definition) = {
+  type: "compute.googleapis.com/InterconnectAttachment"
+  pattern: "projects/{project}/regions/{region}/interconnectAttachments/{resource_id}"
+};
+option (google.api.resource_definition) = {
+  type: "compute.googleapis.com/Instance"
+  pattern: "projects/{project}/zones/{zone}/instances/{instance}"
+};
+
+// Connectivity Hub is a hub-and-spoke abstraction for network connectivity
+// management in Google Cloud. The Hub aims to reduce operational complexity
+// through a simple, centralized connectivity management model.
+service HubService {
+  option (google.api.default_host) = "networkconnectivity.googleapis.com";
+  option (google.api.oauth_scopes) = "https://www.googleapis.com/auth/cloud-platform";
+
+  // Lists Hubs in a given project and location.
+  rpc ListHubs(ListHubsRequest) returns (ListHubsResponse) {
+    option (google.api.http) = {
+      get: "/v1alpha1/{parent=projects/*/locations/global}/hubs"
+    };
+    option (google.api.method_signature) = "parent";
+  }
+
+  // Gets details of a single Hub.
+  rpc GetHub(GetHubRequest) returns (Hub) {
+    option (google.api.http) = {
+      get: "/v1alpha1/{name=projects/*/locations/global/hubs/*}"
+    };
+    option (google.api.method_signature) = "name";
+  }
+
+  // Creates a new Hub in a given project and location.
+  rpc CreateHub(CreateHubRequest) returns (google.longrunning.Operation) {
+    option (google.api.http) = {
+      post: "/v1alpha1/{parent=projects/*/locations/global}/hubs"
+      body: "hub"
+    };
+    option (google.api.method_signature) = "parent,hub,hub_id";
+    option (google.longrunning.operation_info) = {
+      response_type: "Hub"
+      metadata_type: "OperationMetadata"
+    };
+  }
+
+  // Updates the parameters of a single Hub.
+  rpc UpdateHub(UpdateHubRequest) returns (google.longrunning.Operation) {
+    option (google.api.http) = {
+      patch: "/v1alpha1/{hub.name=projects/*/locations/global/hubs/*}"
+      body: "hub"
+    };
+    option (google.api.method_signature) = "hub,update_mask";
+    option (google.longrunning.operation_info) = {
+      response_type: "Hub"
+      metadata_type: "OperationMetadata"
+    };
+  }
+
+  // Deletes a single Hub.
+  rpc DeleteHub(DeleteHubRequest) returns (google.longrunning.Operation) {
+    option (google.api.http) = {
+      delete: "/v1alpha1/{name=projects/*/locations/global/hubs/*}"
+    };
+    option (google.api.method_signature) = "name";
+    option (google.longrunning.operation_info) = {
+      response_type: "google.protobuf.Empty"
+      metadata_type: "OperationMetadata"
+    };
+  }
+
+  // Lists Spokes in a given project and location.
+  rpc ListSpokes(ListSpokesRequest) returns (ListSpokesResponse) {
+    option (google.api.http) = {
+      get: "/v1alpha1/{parent=projects/*/locations/*}/spokes"
+    };
+    option (google.api.method_signature) = "parent";
+  }
+
+  // Gets details of a single Spoke.
+  rpc GetSpoke(GetSpokeRequest) returns (Spoke) {
+    option (google.api.http) = {
+      get: "/v1alpha1/{name=projects/*/locations/*/spokes/*}"
+    };
+    option (google.api.method_signature) = "name";
+  }
+
+  // Creates a new Spoke in a given project and location.
+  rpc CreateSpoke(CreateSpokeRequest) returns (google.longrunning.Operation) {
+    option (google.api.http) = {
+      post: "/v1alpha1/{parent=projects/*/locations/*}/spokes"
+      body: "spoke"
+    };
+    option (google.api.method_signature) = "parent,spoke,spoke_id";
+    option (google.longrunning.operation_info) = {
+      response_type: "Spoke"
+      metadata_type: "OperationMetadata"
+    };
+  }
+
+  // Updates the parameters of a single Spoke.
+  rpc UpdateSpoke(UpdateSpokeRequest) returns (google.longrunning.Operation) {
+    option (google.api.http) = {
+      patch: "/v1alpha1/{spoke.name=projects/*/locations/*/spokes/*}"
+      body: "spoke"
+    };
+    option (google.api.method_signature) = "spoke,update_mask";
+    option (google.longrunning.operation_info) = {
+      response_type: "Spoke"
+      metadata_type: "OperationMetadata"
+    };
+  }
+
+  // Deletes a single Spoke.
+  rpc DeleteSpoke(DeleteSpokeRequest) returns (google.longrunning.Operation) {
+    option (google.api.http) = {
+      delete: "/v1alpha1/{name=projects/*/locations/*/spokes/*}"
+    };
+    option (google.api.method_signature) = "name";
+    option (google.longrunning.operation_info) = {
+      response_type: "google.protobuf.Empty"
+      metadata_type: "OperationMetadata"
+    };
+  }
+}
+
+// The Connectivity Hub is a hub-and-spoke abstraction for network connectivity
+// management in Google Cloud. It aims to reduce operational complexity
+// through a simple, centralized connectivity management model. Here is the
+// resource message of a Hub.
+message Hub {
+  option (google.api.resource) = {
+    type: "networkconnectivity.googleapis.com/Hub"
+    pattern: "projects/{project}/locations/global/hubs/{hub}"
+  };
+
+  // Immutable. The name of a Hub resource.
+  string name = 1 [(google.api.field_behavior) = IMMUTABLE];
+
+  // Time when the Hub was created.
+  google.protobuf.Timestamp create_time = 2;
+
+  // Time when the Hub was updated.
+  google.protobuf.Timestamp update_time = 3;
+
+  // User-defined labels.
+  map<string, string> labels = 4;
+
+  // Short description of the hub resource.
+  string description = 5;
+
+  // Output only. A list of the URIs of all attached spokes
+  repeated string spokes = 6 [
+    (google.api.field_behavior) = OUTPUT_ONLY,
+    (google.api.resource_reference) = {
+      type: "networkconnectivity.googleapis.com/Spoke"
+    }
+  ];
+
+  // Output only. Google-generated UUID for this resource. This is unique across all Hub
+  // resources. If a Hub resource is deleted and another with the same name is
+  // created, it gets a different unique_id.
+  string unique_id = 8 [(google.api.field_behavior) = OUTPUT_ONLY];
+}
+
+// A Spoke is an  abstraction of a network attachment being attached
+// to a Hub. A Spoke can be underlying a VPN tunnel, a
+// VLAN (interconnect) attachment, a Router appliance, etc.
+message Spoke {
+  option (google.api.resource) = {
+    type: "networkconnectivity.googleapis.com/Spoke"
+    pattern: "projects/{project}/locations/{location}/spokes/{spoke}"
+  };
+
+  // Immutable. The name of a Spoke resource.
+  string name = 1 [(google.api.field_behavior) = IMMUTABLE];
+
+  // The time when the Spoke was created.
+  google.protobuf.Timestamp create_time = 2;
+
+  // The time when the Spoke was updated.
+  google.protobuf.Timestamp update_time = 3;
+
+  // User-defined labels.
+  map<string, string> labels = 4;
+
+  // Short description of the spoke resource
+  string description = 5;
+
+  // The resource URL of the hub resource that the spoke is attached to
+  string hub = 6 [(google.api.resource_reference) = {
+                    type: "networkconnectivity.googleapis.com/Hub"
+                  }];
+
+  // The URIs of linked VPN tunnel resources
+  repeated string linked_vpn_tunnels = 12 [(google.api.resource_reference) = {
+                                             type: "compute.googleapis.com/VpnTunnel"
+                                           }];
+
+  // The URIs of linked interconnect attachment resources
+  repeated string linked_interconnect_attachments = 13 [(google.api.resource_reference) = {
+                                                          type: "compute.googleapis.com/InterconnectAttachment"
+                                                        }];
+
+  // The URIs of linked Router appliance resources
+  repeated RouterApplianceInstance linked_router_appliance_instances = 14;
+
+  // Output only. Google-generated UUID for this resource. This is unique across all Spoke
+  // resources. If a Spoke resource is deleted and another with the same name is
+  // created, it gets a different unique_id.
+  string unique_id = 11 [(google.api.field_behavior) = OUTPUT_ONLY];
+}
+
+// Request for [HubService.ListHubs][google.cloud.networkconnectivity.v1alpha1.HubService.ListHubs] method.
+message ListHubsRequest {
+  // Required. The parent resource's name.
+  string parent = 1 [
+    (google.api.field_behavior) = REQUIRED,
+    (google.api.resource_reference) = {
+      type: "locations.googleapis.com/Location"
+    }
+  ];
+
+  // The maximum number of results per page that should be returned.
+  int32 page_size = 2;
+
+  // The page token.
+  string page_token = 3;
+
+  // A filter expression that filters the results listed in the response.
+  string filter = 4;
+
+  // Sort the results by a certain order.
+  string order_by = 5;
+}
+
+// Response for [HubService.ListHubs][google.cloud.networkconnectivity.v1alpha1.HubService.ListHubs] method.
+message ListHubsResponse {
+  // Hubs to be returned.
+  repeated Hub hubs = 1;
+
+  // The next pagination token in the List response. It should be used as
+  // page_token for the following request. An empty value means no more result.
+  string next_page_token = 2;
+
+  // Locations that could not be reached.
+  repeated string unreachable = 3;
+}
+
+// Request for [HubService.GetHub][google.cloud.networkconnectivity.v1alpha1.HubService.GetHub] method.
+message GetHubRequest {
+  // Required. Name of the Hub resource to get.
+  string name = 1 [
+    (google.api.field_behavior) = REQUIRED,
+    (google.api.resource_reference) = {
+      type: "networkconnectivity.googleapis.com/Hub"
+    }
+  ];
+}
+
+// Request for [HubService.CreateHub][google.cloud.networkconnectivity.v1alpha1.HubService.CreateHub] method.
+message CreateHubRequest {
+  // Required. The parent resource's name of the Hub.
+  string parent = 1 [
+    (google.api.field_behavior) = REQUIRED,
+    (google.api.resource_reference) = {
+      type: "locations.googleapis.com/Location"
+    }
+  ];
+
+  // Optional. Unique id for the Hub to create.
+  string hub_id = 2 [(google.api.field_behavior) = OPTIONAL];
+
+  // Required. Initial values for a new Hub.
+  Hub hub = 3 [(google.api.field_behavior) = REQUIRED];
+
+  // Optional. An optional request ID to identify requests. Specify a unique request ID
+  // so that if you must retry your request, the server will know to ignore
+  // the request if it has already been completed. The server will guarantee
+  // that for at least 60 minutes since the first request.
+  //
+  // For example, consider a situation where you make an initial request and t
+  // he request times out. If you make the request again with the same request
+  // ID, the server can check if original operation with the same request ID
+  // was received, and if so, will ignore the second request. This prevents
+  // clients from accidentally creating duplicate commitments.
+  //
+  // The request ID must be a valid UUID with the exception that zero UUID is
+  // not supported (00000000-0000-0000-0000-000000000000).
+  string request_id = 4 [(google.api.field_behavior) = OPTIONAL];
+}
+
+// Request for [HubService.UpdateHub][google.cloud.networkconnectivity.v1alpha1.HubService.UpdateHub] method.
+message UpdateHubRequest {
+  // Optional. Field mask is used to specify the fields to be overwritten in the
+  // Hub resource by the update.
+  // The fields specified in the update_mask are relative to the resource, not
+  // the full request. A field will be overwritten if it is in the mask. If the
+  // user does not provide a mask then all fields will be overwritten.
+  google.protobuf.FieldMask update_mask = 1 [(google.api.field_behavior) = OPTIONAL];
+
+  // Required. The state that the Hub should be in after the update.
+  Hub hub = 2 [(google.api.field_behavior) = REQUIRED];
+
+  // Optional. An optional request ID to identify requests. Specify a unique request ID
+  // so that if you must retry your request, the server will know to ignore
+  // the request if it has already been completed. The server will guarantee
+  // that for at least 60 minutes since the first request.
+  //
+  // For example, consider a situation where you make an initial request and t
+  // he request times out. If you make the request again with the same request
+  // ID, the server can check if original operation with the same request ID
+  // was received, and if so, will ignore the second request. This prevents
+  // clients from accidentally creating duplicate commitments.
+  //
+  // The request ID must be a valid UUID with the exception that zero UUID is
+  // not supported (00000000-0000-0000-0000-000000000000).
+  string request_id = 3 [(google.api.field_behavior) = OPTIONAL];
+}
+
+// The request for [HubService.DeleteHub][google.cloud.networkconnectivity.v1alpha1.HubService.DeleteHub].
+message DeleteHubRequest {
+  // Required. The name of the Hub to delete.
+  string name = 1 [
+    (google.api.field_behavior) = REQUIRED,
+    (google.api.resource_reference) = {
+      type: "networkconnectivity.googleapis.com/Hub"
+    }
+  ];
+
+  // Optional. An optional request ID to identify requests. Specify a unique request ID
+  // so that if you must retry your request, the server will know to ignore
+  // the request if it has already been completed. The server will guarantee
+  // that for at least 60 minutes after the first request.
+  //
+  // For example, consider a situation where you make an initial request and t
+  // he request times out. If you make the request again with the same request
+  // ID, the server can check if original operation with the same request ID
+  // was received, and if so, will ignore the second request. This prevents
+  // clients from accidentally creating duplicate commitments.
+  //
+  // The request ID must be a valid UUID with the exception that zero UUID is
+  // not supported (00000000-0000-0000-0000-000000000000).
+  string request_id = 2 [(google.api.field_behavior) = OPTIONAL];
+}
+
+// The request for [HubService.ListSpokes][google.cloud.networkconnectivity.v1alpha1.HubService.ListSpokes].
+message ListSpokesRequest {
+  // Required. The parent's resource name.
+  string parent = 1 [
+    (google.api.field_behavior) = REQUIRED,
+    (google.api.resource_reference) = {
+      type: "locations.googleapis.com/Location"
+    }
+  ];
+
+  // The maximum number of results per page that should be returned.
+  int32 page_size = 2;
+
+  // The page token.
+  string page_token = 3;
+
+  // A filter expression that filters the results listed in the response.
+  string filter = 4;
+
+  // Sort the results by a certain order.
+  string order_by = 5;
+}
+
+// The response for [HubService.ListSpokes][google.cloud.networkconnectivity.v1alpha1.HubService.ListSpokes].
+message ListSpokesResponse {
+  // Spokes to be returned.
+  repeated Spoke spokes = 1;
+
+  // The next pagination token in the List response. It should be used as
+  // page_token for the following request. An empty value means no more result.
+  string next_page_token = 2;
+
+  // Locations that could not be reached.
+  repeated string unreachable = 3;
+}
+
+// The request for [HubService.GetSpoke][google.cloud.networkconnectivity.v1alpha1.HubService.GetSpoke].
+message GetSpokeRequest {
+  // Required. The name of Spoke resource.
+  string name = 1 [
+    (google.api.field_behavior) = REQUIRED,
+    (google.api.resource_reference) = {
+      type: "networkconnectivity.googleapis.com/Spoke"
+    }
+  ];
+}
+
+// The request for [HubService.CreateSpoke][google.cloud.networkconnectivity.v1alpha1.HubService.CreateSpoke].
+message CreateSpokeRequest {
+  // Required. The parent's resource name of the Spoke.
+  string parent = 1 [
+    (google.api.field_behavior) = REQUIRED,
+    (google.api.resource_reference) = {
+      type: "locations.googleapis.com/Location"
+    }
+  ];
+
+  // Optional. Unique id for the Spoke to create.
+  string spoke_id = 2 [(google.api.field_behavior) = OPTIONAL];
+
+  // Required. Initial values for a new Hub.
+  Spoke spoke = 3 [(google.api.field_behavior) = REQUIRED];
+
+  // Optional. An optional request ID to identify requests. Specify a unique request ID
+  // so that if you must retry your request, the server will know to ignore
+  // the request if it has already been completed. The server will guarantee
+  // that for at least 60 minutes since the first request.
+  //
+  // For example, consider a situation where you make an initial request and t
+  // he request times out. If you make the request again with the same request
+  // ID, the server can check if original operation with the same request ID
+  // was received, and if so, will ignore the second request. This prevents
+  // clients from accidentally creating duplicate commitments.
+  //
+  // The request ID must be a valid UUID with the exception that zero UUID is
+  // not supported (00000000-0000-0000-0000-000000000000).
+  string request_id = 4 [(google.api.field_behavior) = OPTIONAL];
+}
+
+// Request for [HubService.UpdateSpoke][google.cloud.networkconnectivity.v1alpha1.HubService.UpdateSpoke] method.
+message UpdateSpokeRequest {
+  // Optional. Field mask is used to specify the fields to be overwritten in the
+  // Spoke resource by the update.
+  // The fields specified in the update_mask are relative to the resource, not
+  // the full request. A field will be overwritten if it is in the mask. If the
+  // user does not provide a mask then all fields will be overwritten.
+  google.protobuf.FieldMask update_mask = 1 [(google.api.field_behavior) = OPTIONAL];
+
+  // Required. The state that the Spoke should be in after the update.
+  Spoke spoke = 2 [(google.api.field_behavior) = REQUIRED];
+
+  // Optional. An optional request ID to identify requests. Specify a unique request ID
+  // so that if you must retry your request, the server will know to ignore
+  // the request if it has already been completed. The server will guarantee
+  // that for at least 60 minutes since the first request.
+  //
+  // For example, consider a situation where you make an initial request and t
+  // he request times out. If you make the request again with the same request
+  // ID, the server can check if original operation with the same request ID
+  // was received, and if so, will ignore the second request. This prevents
+  // clients from accidentally creating duplicate commitments.
+  //
+  // The request ID must be a valid UUID with the exception that zero UUID is
+  // not supported (00000000-0000-0000-0000-000000000000).
+  string request_id = 3 [(google.api.field_behavior) = OPTIONAL];
+}
+
+// The request for [HubService.DeleteSpoke][google.cloud.networkconnectivity.v1alpha1.HubService.DeleteSpoke].
+message DeleteSpokeRequest {
+  // Required. The name of the Spoke to delete.
+  string name = 1 [
+    (google.api.field_behavior) = REQUIRED,
+    (google.api.resource_reference) = {
+      type: "networkconnectivity.googleapis.com/Spoke"
+    }
+  ];
+
+  // Optional. An optional request ID to identify requests. Specify a unique request ID
+  // so that if you must retry your request, the server will know to ignore
+  // the request if it has already been completed. The server will guarantee
+  // that for at least 60 minutes after the first request.
+  //
+  // For example, consider a situation where you make an initial request and t
+  // he request times out. If you make the request again with the same request
+  // ID, the server can check if original operation with the same request ID
+  // was received, and if so, will ignore the second request. This prevents
+  // clients from accidentally creating duplicate commitments.
+  //
+  // The request ID must be a valid UUID with the exception that zero UUID is
+  // not supported (00000000-0000-0000-0000-000000000000).
+  string request_id = 2 [(google.api.field_behavior) = OPTIONAL];
+}
+
+// RouterAppliance represents a Router appliance which is specified by a VM URI
+// and a NIC address.
+message RouterApplianceInstance {
+  // The URI of the virtual machine resource
+  string virtual_machine = 1 [(google.api.resource_reference) = {
+                                type: "compute.googleapis.com/Instance"
+                              }];
+
+  // The IP address of the network interface to use for peering.
+  string ip_address = 3;
+
+  string network_interface = 2 [deprecated = true];
+}
diff --git a/google/cloud/networkconnectivity/v1alpha1/networkconnectivity_gapic.yaml b/google/cloud/networkconnectivity/v1alpha1/networkconnectivity_gapic.yaml
new file mode 100644
index 00000000..fa8f7981
--- /dev/null
+++ b/google/cloud/networkconnectivity/v1alpha1/networkconnectivity_gapic.yaml
@@ -0,0 +1,16 @@
+type: com.google.api.codegen.ConfigProto
+config_schema_version: 2.0.0
+language_settings:
+  python:
+    package_name: google.cloud.networkconnectivity.v1alpha1.gapic
+  go:
+    package_name: cloud.google.com/go/cloud/networkconnectivity/apiv1alpha1
+  csharp:
+    package_name: Google.Cloud.NetworkConnectivity.V1Alpha1
+  ruby:
+    package_name: Google::Cloud::NetworkConnectivity::V1Alpha1
+  php:
+    package_name: Google\Cloud\NetworkConnectivity\V1Alpha1
+  nodejs:
+    package_name: networkconnectivity.v1alpha1
+    domain_layer_location: google-cloud
diff --git a/google/cloud/networkconnectivity/v1alpha1/networkconnectivity_grpc_service_config.json b/google/cloud/networkconnectivity/v1alpha1/networkconnectivity_grpc_service_config.json
new file mode 100644
index 00000000..d2db7958
--- /dev/null
+++ b/google/cloud/networkconnectivity/v1alpha1/networkconnectivity_grpc_service_config.json
@@ -0,0 +1,24 @@
+{
+  "methodConfig": [{
+    "name": [{ "service": "google.cloud.networkconnectivity.v1alpha1.HubService" }],
+    "timeout": "60s",
+    "retryPolicy": {
+      "maxAttempts": 5,
+      "initialBackoff": "1s",
+      "maxBackoff": "10s",
+      "backoffMultiplier": 1.3,
+      "retryableStatusCodes": ["UNAVAILABLE"]
+    }
+  },
+  {
+    "name": [
+      { "service": "google.cloud.networkconnectivity.v1alpha1.HubService", "method": "CreateHub" },
+      { "service": "google.cloud.networkconnectivity.v1alpha1.HubService", "method": "UpdateHub" },
+      { "service": "google.cloud.networkconnectivity.v1alpha1.HubService", "method": "DeleteHub" },
+      { "service": "google.cloud.networkconnectivity.v1alpha1.HubService", "method": "CreateSpoke" },
+      { "service": "google.cloud.networkconnectivity.v1alpha1.HubService", "method": "UpdateSpoke" },
+      { "service": "google.cloud.networkconnectivity.v1alpha1.HubService", "method": "DeleteSpoke" }
+    ],
+    "timeout": "60s"
+  }]
+}
diff --git a/google/cloud/networkconnectivity/v1alpha1/networkconnectivity_v1alpha1.yaml b/google/cloud/networkconnectivity/v1alpha1/networkconnectivity_v1alpha1.yaml
new file mode 100644
index 00000000..65b594b4
--- /dev/null
+++ b/google/cloud/networkconnectivity/v1alpha1/networkconnectivity_v1alpha1.yaml
@@ -0,0 +1,97 @@
+type: google.api.Service
+config_version: 3
+name: networkconnectivity.googleapis.com
+title: Network Connectivity API
+
+apis:
+- name: google.cloud.networkconnectivity.v1alpha1.HubService
+
+types:
+- name: google.cloud.networkconnectivity.v1alpha1.OperationMetadata
+
+documentation:
+  summary: |-
+    The Network Connectivity API will be home to various services which provide
+    information pertaining to network connectivity.
+  overview: |-
+    The Network Connectivity API will be home to various services which
+    provide information pertaining to network connectivity. This includes
+    information like interconnects, VPNs, VPCs, routing information, ip
+    address details, etc. This information will help customers verify their
+    network configurations and helps them to discover misconfigurations,
+    inconsistencies, etc.
+  rules:
+  - selector: google.iam.v1.IAMPolicy.GetIamPolicy
+    description: |-
+      Gets the access control policy for a resource. Returns an empty policy
+      if the resource exists and does not have a policy set.
+
+  - selector: google.iam.v1.IAMPolicy.SetIamPolicy
+    description: |-
+      Sets the access control policy on the specified resource. Replaces
+      any existing policy.
+
+      Can return `NOT_FOUND`, `INVALID_ARGUMENT`, and `PERMISSION_DENIED`
+      errors.
+
+  - selector: google.iam.v1.IAMPolicy.TestIamPermissions
+    description: |-
+      Returns permissions that a caller has on the specified resource. If the
+      resource does not exist, this will return an empty set of
+      permissions, not a `NOT_FOUND` error.
+
+      Note: This operation is designed to be used for building
+      permission-aware UIs and command-line tools, not for authorization
+      checking. This operation may "fail open" without warning.
+
+backend:
+  rules:
+  - selector: 'google.cloud.networkconnectivity.v1alpha1.HubService.*'
+    deadline: 60.0
+  - selector: 'google.iam.v1.IAMPolicy.*'
+    deadline: 60.0
+  - selector: 'google.longrunning.Operations.*'
+    deadline: 60.0
+
+http:
+  rules:
+  - selector: google.iam.v1.IAMPolicy.GetIamPolicy
+    get: '/v1alpha1/{resource=projects/*/locations/global/hubs/*}:getIamPolicy'
+    additional_bindings:
+    - get: '/v1alpha1/{resource=projects/*/locations/*/spokes/*}:getIamPolicy'
+  - selector: google.iam.v1.IAMPolicy.SetIamPolicy
+    post: '/v1alpha1/{resource=projects/*/locations/global/hubs/*}:setIamPolicy'
+    body: '*'
+    additional_bindings:
+    - post: '/v1alpha1/{resource=projects/*/locations/*/spokes/*}:setIamPolicy'
+      body: '*'
+  - selector: google.iam.v1.IAMPolicy.TestIamPermissions
+    post: '/v1alpha1/{resource=projects/*/locations/global/hubs/*}:testIamPermissions'
+    body: '*'
+    additional_bindings:
+    - post: '/v1alpha1/{resource=projects/*/locations/*/spokes/*}:testIamPermissions'
+      body: '*'
+  - selector: google.longrunning.Operations.CancelOperation
+    post: '/v1alpha1/{name=projects/*/locations/*/operations/*}:cancel'
+    body: '*'
+  - selector: google.longrunning.Operations.DeleteOperation
+    delete: '/v1alpha1/{name=projects/*/locations/*/operations/*}'
+  - selector: google.longrunning.Operations.GetOperation
+    get: '/v1alpha1/{name=projects/*/locations/*/operations/*}'
+  - selector: google.longrunning.Operations.ListOperations
+    get: '/v1alpha1/{name=projects/*/locations/*}/operations'
+
+authentication:
+  rules:
+  - selector: 'google.cloud.networkconnectivity.v1alpha1.HubService.*'
+    oauth:
+      canonical_scopes: |-
+        https://www.googleapis.com/auth/cloud-platform
+  - selector: 'google.iam.v1.IAMPolicy.*'
+    oauth:
+      canonical_scopes: |-
+        https://www.googleapis.com/auth/cloud-platform
+  - selector: 'google.longrunning.Operations.*'
+    oauth:
+      canonical_scopes: |-
+        https://www.googleapis.com/auth/cloud-platform