An idiomatic C++ client library for theConfidential Computing API, a service to create challenges and verify attestation responses.
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/confidentialcomputing/quickstart/directory, which should give you a taste of the Confidential Computing 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 webpage provides documentation for the Confidential Computing API C++ client library, which is currently in General Availability (GA) and does not follow Semantic Versioning.\u003c/p\u003e\n"],["\u003cp\u003eThe library is designed to interact with the Confidential Computing API, enabling the creation of challenges and verification of attestation responses.\u003c/p\u003e\n"],["\u003cp\u003eThe primary class within this library is \u003ccode\u003econfidentialcomputing_v1::ConfidentialComputingClient\u003c/code\u003e, which exposes all Remote Procedure Calls (RPCs) as member functions.\u003c/p\u003e\n"],["\u003cp\u003eThe documentation covers a range of topics, including error handling, overriding the default endpoint and authentication credentials, adjusting retry policies, and leveraging environment variables for library configuration.\u003c/p\u003e\n"],["\u003cp\u003eThe most recent version is \u003ccode\u003e2.37.0-rc\u003c/code\u003e with many prior versions being available for use such as \u003ccode\u003e2.36.0\u003c/code\u003e, \u003ccode\u003e2.35.0\u003c/code\u003e, and so on, until \u003ccode\u003e2.11.0\u003c/code\u003e.\u003c/p\u003e\n"]]],[],null,["Version 2.16.0keyboard_arrow_down\n\n- [2.42.0-rc (latest)](/cpp/docs/reference/confidentialcomputing/latest)\n- [2.41.0](/cpp/docs/reference/confidentialcomputing/2.41.0)\n- [2.40.0](/cpp/docs/reference/confidentialcomputing/2.40.0)\n- [2.39.0](/cpp/docs/reference/confidentialcomputing/2.39.0)\n- [2.38.0](/cpp/docs/reference/confidentialcomputing/2.38.0)\n- [2.37.0](/cpp/docs/reference/confidentialcomputing/2.37.0)\n- [2.36.0](/cpp/docs/reference/confidentialcomputing/2.36.0)\n- [2.35.0](/cpp/docs/reference/confidentialcomputing/2.35.0)\n- [2.34.0](/cpp/docs/reference/confidentialcomputing/2.34.0)\n- [2.33.0](/cpp/docs/reference/confidentialcomputing/2.33.0)\n- [2.32.0](/cpp/docs/reference/confidentialcomputing/2.32.0)\n- [2.31.0](/cpp/docs/reference/confidentialcomputing/2.31.0)\n- [2.30.0](/cpp/docs/reference/confidentialcomputing/2.30.0)\n- [2.29.0](/cpp/docs/reference/confidentialcomputing/2.29.0)\n- [2.28.0](/cpp/docs/reference/confidentialcomputing/2.28.0)\n- [2.27.0](/cpp/docs/reference/confidentialcomputing/2.27.0)\n- [2.26.0](/cpp/docs/reference/confidentialcomputing/2.26.0)\n- [2.25.1](/cpp/docs/reference/confidentialcomputing/2.25.1)\n- [2.24.0](/cpp/docs/reference/confidentialcomputing/2.24.0)\n- [2.23.0](/cpp/docs/reference/confidentialcomputing/2.23.0)\n- [2.22.1](/cpp/docs/reference/confidentialcomputing/2.22.1)\n- [2.21.0](/cpp/docs/reference/confidentialcomputing/2.21.0)\n- [2.20.0](/cpp/docs/reference/confidentialcomputing/2.20.0)\n- [2.19.0](/cpp/docs/reference/confidentialcomputing/2.19.0)\n- [2.18.0](/cpp/docs/reference/confidentialcomputing/2.18.0)\n- [2.17.0](/cpp/docs/reference/confidentialcomputing/2.17.0)\n- [2.16.0](/cpp/docs/reference/confidentialcomputing/2.16.0)\n- [2.15.1](/cpp/docs/reference/confidentialcomputing/2.15.1)\n- [2.14.0](/cpp/docs/reference/confidentialcomputing/2.14.0)\n- [2.13.0](/cpp/docs/reference/confidentialcomputing/2.13.0)\n- [2.12.0](/cpp/docs/reference/confidentialcomputing/2.12.0)\n- [2.11.0](/cpp/docs/reference/confidentialcomputing/2.11.0) \n\nConfidential Computing API C++ Client Library\n=============================================\n\nAn idiomatic C++ client library for the [Confidential Computing API](https://cloud.google.com/confidential-computing), a service to create challenges and verify attestation responses.\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/confidentialcomputing/quickstart/` directory, which should give you a taste of the Confidential Computing API C++ client library API. \n\n #include \"google/cloud/confidentialcomputing/v1/confidential_computing_client.h\"\n #include \"google/cloud/project.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\n namespace confidentialcomputing = ::google::cloud::confidentialcomputing_v1;\n auto client = confidentialcomputing::ConfidentialComputingClient(\n confidentialcomputing::MakeConfidentialComputingConnection());\n\n // auto const project = google::cloud::Project(argv[1]);\n auto const parent =\n std::string{\"projects/\"} + argv[1] + \"/locations/\" + argv[2];\n auto result = client.CreateChallenge(parent, {});\n if (!result) throw std::move(result).status();\n std::cout \u003c\u003c result-\u003eDebugString() \u003c\u003c \"\\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 [`confidentialcomputing_v1::ConfidentialComputingClient`](/cpp/docs/reference/confidentialcomputing/2.16.0/classgoogle_1_1cloud_1_1confidentialcomputing__v1_1_1ConfidentialComputingClient). All RPCs are exposed as member functions of this class. Other classes provide helpers, configuration parameters, and infrastructure to mock [`confidentialcomputing_v1::ConfidentialComputingClient`](/cpp/docs/reference/confidentialcomputing/2.16.0/classgoogle_1_1cloud_1_1confidentialcomputing__v1_1_1ConfidentialComputingClient) 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/confidentialcomputing/2.16.0/confidentialcomputing-override-endpoint) - describes how to override the default endpoint.\n- [How to Override the Authentication Credentials](/cpp/docs/reference/confidentialcomputing/2.16.0/confidentialcomputing-override-authentication) - describes how to change the authentication credentials used by the library.\n- [Override Retry, Backoff, and Idempotency Policies](/cpp/docs/reference/confidentialcomputing/2.16.0/confidentialcomputing-override-retry) - describes how to change the default retry policies.\n- [Environment Variables](/cpp/docs/reference/confidentialcomputing/2.16.0/confidentialcomputing-env) - describes environment variables that can configure the behavior of the library."]]