An idiomatic C++ client library for theNetwork Connectivity API, a suite of products that provide enterprise connectivity from your on-premises network or from another cloud provider to your Virtual Private Cloud (VPC) network.
While this library isGA, please note that the Google Cloud C++ client libraries donotfollowSemantic Versioning.
Quickstart
The following shows the code that you'll run in thegoogle/cloud/networkconnectivity/quickstart/directory, which should give you a taste of the Network Connectivity API C++ client library API.
This library offers multiple*Clientclasses, which are listed below. Each one of these classes exposes all the RPCs for a service as member functions of the class. This library groups multiple services because they are part of the same product or are often used together. A typical example may be the administrative and data plane operations for a single product.
The library also has other classes that provide helpers, configuration parameters, and infrastructure to mock the*Clientclasses when testing your application.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-09-04 UTC."],[[["\u003cp\u003eThis webpage provides documentation for the Network Connectivity API C++ Client Library, which facilitates enterprise connectivity from on-premises or other cloud providers to a Virtual Private Cloud (VPC) network.\u003c/p\u003e\n"],["\u003cp\u003eThe library version documented here is 2.26.0, while 2.37.0-rc is the latest available version, and there are numerous other versions accessible.\u003c/p\u003e\n"],["\u003cp\u003eThe C++ client library includes multiple \u003ccode\u003e*Client\u003c/code\u003e classes, like \u003ccode\u003eHubServiceClient\u003c/code\u003e and \u003ccode\u003ePolicyBasedRoutingServiceClient\u003c/code\u003e, which expose all RPCs for their respective services as member functions, despite these libraries not following semantic versioning.\u003c/p\u003e\n"],["\u003cp\u003eThe library offers features such as error handling, the ability to override the default endpoint and authentication credentials, as well as the ability to override retry policies and manage the library behavior using environment variables.\u003c/p\u003e\n"],["\u003cp\u003eA quickstart guide is provided with an example using the \u003ccode\u003eHubServiceClient\u003c/code\u003e to list available hubs, giving a simple practical example of the library's use.\u003c/p\u003e\n"]]],[],null,["Version 2.26.0keyboard_arrow_down\n\n- [2.42.0-rc (latest)](/cpp/docs/reference/networkconnectivity/latest)\n- [2.41.0](/cpp/docs/reference/networkconnectivity/2.41.0)\n- [2.40.0](/cpp/docs/reference/networkconnectivity/2.40.0)\n- [2.39.0](/cpp/docs/reference/networkconnectivity/2.39.0)\n- [2.38.0](/cpp/docs/reference/networkconnectivity/2.38.0)\n- [2.37.0](/cpp/docs/reference/networkconnectivity/2.37.0)\n- [2.36.0](/cpp/docs/reference/networkconnectivity/2.36.0)\n- [2.35.0](/cpp/docs/reference/networkconnectivity/2.35.0)\n- [2.34.0](/cpp/docs/reference/networkconnectivity/2.34.0)\n- [2.33.0](/cpp/docs/reference/networkconnectivity/2.33.0)\n- [2.32.0](/cpp/docs/reference/networkconnectivity/2.32.0)\n- [2.31.0](/cpp/docs/reference/networkconnectivity/2.31.0)\n- [2.30.0](/cpp/docs/reference/networkconnectivity/2.30.0)\n- [2.29.0](/cpp/docs/reference/networkconnectivity/2.29.0)\n- [2.28.0](/cpp/docs/reference/networkconnectivity/2.28.0)\n- [2.27.0](/cpp/docs/reference/networkconnectivity/2.27.0)\n- [2.26.0](/cpp/docs/reference/networkconnectivity/2.26.0)\n- [2.25.1](/cpp/docs/reference/networkconnectivity/2.25.1)\n- [2.24.0](/cpp/docs/reference/networkconnectivity/2.24.0)\n- [2.23.0](/cpp/docs/reference/networkconnectivity/2.23.0)\n- [2.22.1](/cpp/docs/reference/networkconnectivity/2.22.1)\n- [2.21.0](/cpp/docs/reference/networkconnectivity/2.21.0)\n- [2.20.0](/cpp/docs/reference/networkconnectivity/2.20.0)\n- [2.19.0](/cpp/docs/reference/networkconnectivity/2.19.0)\n- [2.18.0](/cpp/docs/reference/networkconnectivity/2.18.0)\n- [2.17.0](/cpp/docs/reference/networkconnectivity/2.17.0)\n- [2.16.0](/cpp/docs/reference/networkconnectivity/2.16.0)\n- [2.15.1](/cpp/docs/reference/networkconnectivity/2.15.1)\n- [2.14.0](/cpp/docs/reference/networkconnectivity/2.14.0)\n- [2.13.0](/cpp/docs/reference/networkconnectivity/2.13.0)\n- [2.12.0](/cpp/docs/reference/networkconnectivity/2.12.0)\n- [2.11.0](/cpp/docs/reference/networkconnectivity/2.11.0) \n\nNetwork Connectivity API C++ Client Library\n===========================================\n\nAn idiomatic C++ client library for the [Network Connectivity API](https://cloud.google.com/network-connectivity/docs), a suite of products that provide enterprise connectivity from your on-premises network or from another cloud provider to your Virtual Private Cloud (VPC) network.\n\nWhile this library is **GA** , please note that the Google Cloud C++ client libraries do **not** follow [Semantic Versioning](https://semver.org/).\n\n### Quickstart\n\nThe following shows the code that you'll run in the `google/cloud/networkconnectivity/quickstart/` directory, which should give you a taste of the Network Connectivity API C++ client library API. \n\n #include \"google/cloud/networkconnectivity/v1/hub_client.h\"\n #include \"google/cloud/location.h\"\n #include \u003ciostream\u003e\n\n int main(int argc, char* argv[]) try {\n if (argc != 2) {\n std::cerr \u003c\u003c \"Usage: \" \u003c\u003c argv[0] \u003c\u003c \" project-id\\n\";\n return 1;\n }\n\n auto const location = google::cloud::Location(argv[1], \"global\");\n\n namespace networkconnectivity = ::google::cloud::networkconnectivity_v1;\n auto client = networkconnectivity::HubServiceClient(\n networkconnectivity::MakeHubServiceConnection());\n\n for (auto h : client.ListHubs(location.FullName())) {\n if (!h) throw std::move(h).status();\n std::cout \u003c\u003c h-\u003eDebugString() \u003c\u003c \"\\n\";\n }\n\n return 0;\n } catch (google::cloud::Status const& status) {\n std::cerr \u003c\u003c \"google::cloud::Status thrown: \" \u003c\u003c status \u003c\u003c \"\\n\";\n return 1;\n }\n\n### Main classes\n\nThis library offers multiple `*Client` classes, which are listed below. Each one of these classes exposes all the RPCs for a service as member functions of the class. This library groups multiple services because they are part of the same product or are often used together. A typical example may be the administrative and data plane operations for a single product.\n\nThe library also has other classes that provide helpers, configuration parameters, and infrastructure to mock the `*Client` classes when testing your application.\n\n- [`networkconnectivity_v1::HubServiceClient`](/cpp/docs/reference/networkconnectivity/2.26.0/classgoogle_1_1cloud_1_1networkconnectivity__v1_1_1HubServiceClient)\n- [`networkconnectivity_v1::PolicyBasedRoutingServiceClient`](/cpp/docs/reference/networkconnectivity/2.26.0/classgoogle_1_1cloud_1_1networkconnectivity__v1_1_1PolicyBasedRoutingServiceClient)\n\n### More Information\n\n- [Error Handling](https://cloud.google.com/cpp/docs/reference/common/latest/common-error-handling.html) - describes how the library reports errors.\n- [How to Override the Default Endpoint](/cpp/docs/reference/networkconnectivity/2.26.0/networkconnectivity-override-endpoint) - describes how to override the default endpoint.\n- [How to Override the Authentication Credentials](/cpp/docs/reference/networkconnectivity/2.26.0/networkconnectivity-override-authentication) - describes how to change the authentication credentials used by the library.\n- [Override Retry, Backoff, and Idempotency Policies](/cpp/docs/reference/networkconnectivity/2.26.0/networkconnectivity-override-retry) - describes how to change the default retry policies.\n- [Environment Variables](/cpp/docs/reference/networkconnectivity/2.26.0/networkconnectivity-env) - describes environment variables that can configure the behavior of the library."]]