The Public Certificate Authority API may be used to create and manage ACME external account binding keys associated with Google Trust Services' publicly trusted certificate authority.
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/publicca/quickstart/directory, which should give you a taste of the Public Certificate Authority API C++ client library API.
[[["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 page details the C++ client library for the Public Certificate Authority API, which manages ACME external account binding keys for Google Trust Services.\u003c/p\u003e\n"],["\u003cp\u003eThe latest release candidate version is 2.37.0-rc, and the page also provides links to other specific versions, down to 2.25.1, for the C++ client library.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003ePublicCertificateAuthorityServiceClient\u003c/code\u003e class is the primary interface for interacting with the Public Certificate Authority API, enabling the execution of various RPCs.\u003c/p\u003e\n"],["\u003cp\u003eThe C++ client libraries provided by Google Cloud, including this one, do not follow Semantic Versioning, even though this is a GA library.\u003c/p\u003e\n"],["\u003cp\u003eThe page includes a quickstart section that provides an example to help users get started with the library, also offering links for more information about error handling, overriding the default endpoint, authentication, retry policies, and environment variables.\u003c/p\u003e\n"]]],[],null,["Version 2.27.0keyboard_arrow_down\n\n- [2.42.0-rc (latest)](/cpp/docs/reference/publicca/latest)\n- [2.41.0](/cpp/docs/reference/publicca/2.41.0)\n- [2.40.0](/cpp/docs/reference/publicca/2.40.0)\n- [2.39.0](/cpp/docs/reference/publicca/2.39.0)\n- [2.38.0](/cpp/docs/reference/publicca/2.38.0)\n- [2.37.0](/cpp/docs/reference/publicca/2.37.0)\n- [2.36.0](/cpp/docs/reference/publicca/2.36.0)\n- [2.35.0](/cpp/docs/reference/publicca/2.35.0)\n- [2.34.0](/cpp/docs/reference/publicca/2.34.0)\n- [2.33.0](/cpp/docs/reference/publicca/2.33.0)\n- [2.32.0](/cpp/docs/reference/publicca/2.32.0)\n- [2.31.0](/cpp/docs/reference/publicca/2.31.0)\n- [2.30.0](/cpp/docs/reference/publicca/2.30.0)\n- [2.29.0](/cpp/docs/reference/publicca/2.29.0)\n- [2.28.0](/cpp/docs/reference/publicca/2.28.0)\n- [2.27.0](/cpp/docs/reference/publicca/2.27.0)\n- [2.26.0](/cpp/docs/reference/publicca/2.26.0)\n- [2.25.1](/cpp/docs/reference/publicca/2.25.1) \n\nPublic Certificate Authority API C++ Client Library\n===================================================\n\nAn idiomatic C++ client library for the [Public Certificate Authority API](https://cloud.google.com/certificate-manager/docs/public-ca).\n\nThe Public Certificate Authority API may be used to create and manage ACME external account binding keys associated with Google Trust Services' publicly trusted certificate authority.\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/publicca/quickstart/` directory, which should give you a taste of the Public Certificate Authority API C++ client library API. \n\n #include \"google/cloud/publicca/v1/public_certificate_authority_client.h\"\n #include \"google/cloud/location.h\"\n #include \u003ciostream\u003e\n\n int main(int argc, char* argv[]) try {\n if (argc != 3) {\n std::cerr \u003c\u003c \"Usage: \" \u003c\u003c argv[0] \u003c\u003c \" project-id location-id\\n\";\n return 1;\n }\n auto const location = google::cloud::Location(argv[1], argv[2]);\n\n namespace publicca = ::google::cloud::publicca_v1;\n auto client = publicca::PublicCertificateAuthorityServiceClient(\n publicca::MakePublicCertificateAuthorityServiceConnection());\n\n auto key = client.CreateExternalAccountKey(location.FullName(), {});\n if (!key) throw std::move(key).status();\n std::cout \u003c\u003c \"Success!\\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 [`publicca_v1::PublicCertificateAuthorityServiceClient`](/cpp/docs/reference/publicca/2.27.0/classgoogle_1_1cloud_1_1publicca__v1_1_1PublicCertificateAuthorityServiceClient). All RPCs are exposed as member functions of this class. Other classes provide helpers, configuration parameters, and infrastructure to mock [`publicca_v1::PublicCertificateAuthorityServiceClient`](/cpp/docs/reference/publicca/2.27.0/classgoogle_1_1cloud_1_1publicca__v1_1_1PublicCertificateAuthorityServiceClient) when testing your application.\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/publicca/2.27.0/publicca-override-endpoint) - describes how to override the default endpoint.\n- [How to Override the Authentication Credentials](/cpp/docs/reference/publicca/2.27.0/publicca-override-authentication) - describes how to change the authentication credentials used by the library.\n- [Override Retry, Backoff, and Idempotency Policies](/cpp/docs/reference/publicca/2.27.0/publicca-override-retry) - describes how to change the default retry policies.\n- [Environment Variables](/cpp/docs/reference/publicca/2.27.0/publicca-env) - describes environment variables that can configure the behavior of the library."]]