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 connectivity between on-premises or other cloud networks and Google Virtual Private Cloud (VPC) networks.\u003c/p\u003e\n"],["\u003cp\u003eThe latest version of the client library is 2.37.0-rc, with links to documentation for numerous previous versions, from 2.36.0 down to 2.11.0.\u003c/p\u003e\n"],["\u003cp\u003eThe library offers several client classes, including \u003ccode\u003enetworkconnectivity_v1::HubServiceClient\u003c/code\u003e and \u003ccode\u003enetworkconnectivity_v1::PolicyBasedRoutingServiceClient\u003c/code\u003e, which expose RPCs for managing network connectivity.\u003c/p\u003e\n"],["\u003cp\u003eWhile the library is generally available (GA), it does not follow Semantic Versioning practices, as described on the semver.org website.\u003c/p\u003e\n"],["\u003cp\u003eAdditional resources include guides on error handling, overriding default endpoints and authentication credentials, modifying retry policies, and utilizing environment variables to configure the library.\u003c/p\u003e\n"]]],[],null,["Version latestkeyboard_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/latest/classgoogle_1_1cloud_1_1networkconnectivity__v1_1_1HubServiceClient)\n- [`networkconnectivity_v1::PolicyBasedRoutingServiceClient`](/cpp/docs/reference/networkconnectivity/latest/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/latest/networkconnectivity-override-endpoint) - describes how to override the default endpoint.\n- [How to Override the Authentication Credentials](/cpp/docs/reference/networkconnectivity/latest/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/latest/networkconnectivity-override-retry) - describes how to change the default retry policies.\n- [Environment Variables](/cpp/docs/reference/networkconnectivity/latest/networkconnectivity-env) - describes environment variables that can configure the behavior of the library."]]