An idiomatic C++ client library for theAPI Keys API, a service to manage the API keys associated with developer projects.
While this library isGA, please note Google Cloud C++ client libraries donotfollowSemantic Versioning.
Quickstart
The following shows the code that you'll run in thegoogle/cloud/apikeys/quickstart/directory, which should give you a taste of the API Keys API C++ client library API.
The main class in this library isapikeys_v2::ApiKeysClient. All RPCs are exposed as member functions of this class. Other classes provide helpers, configuration parameters, and infrastructure to mockapikeys_v2::ApiKeysClientwhen testing your application.
Retry, Backoff, and Idempotency Policies.
The library automatically retries requests that fail with transient errors, and usesexponential backoffto backoff between retries. Application developers can override the default policies.
More Information
Error Handling- describes how the library reports errors.
[[["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 C++ client library for the API Keys API, which is a service designed for managing API keys associated with developer projects.\u003c/p\u003e\n"],["\u003cp\u003eThe latest release candidate is version 2.37.0-rc, and the page lists available documentation for versions ranging from 2.11.0 to 2.36.0.\u003c/p\u003e\n"],["\u003cp\u003eThe C++ client library, while designated as GA, does not adhere to Semantic Versioning, and it includes a main class \u003ccode\u003eapikeys_v2::ApiKeysClient\u003c/code\u003e that exposes all Remote Procedure Calls (RPCs) as member functions.\u003c/p\u003e\n"],["\u003cp\u003eThe library automatically handles request retries with transient errors and uses exponential backoff between retries, while also allowing developers to override the default policies.\u003c/p\u003e\n"],["\u003cp\u003eThe documentation provides additional information on error handling, overriding the default endpoint, altering authentication credentials, and using environment variables to configure library behavior.\u003c/p\u003e\n"]]],[],null,["Version 2.11.0keyboard_arrow_down\n\n- [2.42.0-rc (latest)](/cpp/docs/reference/apikeys/latest)\n- [2.41.0](/cpp/docs/reference/apikeys/2.41.0)\n- [2.40.0](/cpp/docs/reference/apikeys/2.40.0)\n- [2.39.0](/cpp/docs/reference/apikeys/2.39.0)\n- [2.38.0](/cpp/docs/reference/apikeys/2.38.0)\n- [2.37.0](/cpp/docs/reference/apikeys/2.37.0)\n- [2.36.0](/cpp/docs/reference/apikeys/2.36.0)\n- [2.35.0](/cpp/docs/reference/apikeys/2.35.0)\n- [2.34.0](/cpp/docs/reference/apikeys/2.34.0)\n- [2.33.0](/cpp/docs/reference/apikeys/2.33.0)\n- [2.32.0](/cpp/docs/reference/apikeys/2.32.0)\n- [2.31.0](/cpp/docs/reference/apikeys/2.31.0)\n- [2.30.0](/cpp/docs/reference/apikeys/2.30.0)\n- [2.29.0](/cpp/docs/reference/apikeys/2.29.0)\n- [2.28.0](/cpp/docs/reference/apikeys/2.28.0)\n- [2.27.0](/cpp/docs/reference/apikeys/2.27.0)\n- [2.26.0](/cpp/docs/reference/apikeys/2.26.0)\n- [2.25.1](/cpp/docs/reference/apikeys/2.25.1)\n- [2.24.0](/cpp/docs/reference/apikeys/2.24.0)\n- [2.23.0](/cpp/docs/reference/apikeys/2.23.0)\n- [2.22.1](/cpp/docs/reference/apikeys/2.22.1)\n- [2.21.0](/cpp/docs/reference/apikeys/2.21.0)\n- [2.20.0](/cpp/docs/reference/apikeys/2.20.0)\n- [2.19.0](/cpp/docs/reference/apikeys/2.19.0)\n- [2.18.0](/cpp/docs/reference/apikeys/2.18.0)\n- [2.17.0](/cpp/docs/reference/apikeys/2.17.0)\n- [2.16.0](/cpp/docs/reference/apikeys/2.16.0)\n- [2.15.1](/cpp/docs/reference/apikeys/2.15.1)\n- [2.14.0](/cpp/docs/reference/apikeys/2.14.0)\n- [2.13.0](/cpp/docs/reference/apikeys/2.13.0)\n- [2.12.0](/cpp/docs/reference/apikeys/2.12.0)\n- [2.11.0](/cpp/docs/reference/apikeys/2.11.0) \n\nAPI Keys API C++ Client Library\n===============================\n\nAn idiomatic C++ client library for the [API Keys API](https://cloud.google.com/api-keys), a service to manage the API keys associated with developer projects.\n\nWhile this library is **GA** , please note 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/apikeys/quickstart/` directory, which should give you a taste of the API Keys API C++ client library API. \n\n #include \"google/cloud/apikeys/v2/api_keys_client.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 namespace apikeys = ::google::cloud::apikeys_v2;\n auto client = apikeys::ApiKeysClient(apikeys::MakeApiKeysConnection());\n\n auto const parent = std::string{\"projects/\"} + argv[1] + \"/locations/global\";\n for (auto r : client.ListKeys(parent)) {\n if (!r) throw std::move(r).status();\n std::cout \u003c\u003c r-\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\nThe main class in this library is [`apikeys_v2::ApiKeysClient`](/cpp/docs/reference/apikeys/2.11.0/classgoogle_1_1cloud_1_1apikeys__v2_1_1ApiKeysClient). All RPCs are exposed as member functions of this class. Other classes provide helpers, configuration parameters, and infrastructure to mock [`apikeys_v2::ApiKeysClient`](/cpp/docs/reference/apikeys/2.11.0/classgoogle_1_1cloud_1_1apikeys__v2_1_1ApiKeysClient) when testing your application.\n\n### Retry, Backoff, and Idempotency Policies.\n\nThe library automatically retries requests that fail with transient errors, and uses [exponential backoff](https://en.wikipedia.org/wiki/Exponential_backoff) to backoff between retries. Application developers can override the default policies.\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/apikeys/2.11.0/apikeys-override-endpoint) - describes how to override the default endpoint.\n- [How to Override the Authentication Credentials](/cpp/docs/reference/apikeys/2.11.0/apikeys-override-authentication) - describes how to change the authentication credentials used by the library.\n- [Environment Variables](/cpp/docs/reference/apikeys/2.11.0/apikeys-env) - describes environment variables that can configure the behavior of the library."]]