An idiomatic C++ client library for the Cloud Identity-Aware Proxy API, a service to control access to applications running on Google Cloud Platform.
While this library is GA, please note Google Cloud C++ client libraries do not follow Semantic Versioning.
Quickstart
The following shows the code that you'll run in the google/cloud/iap/quickstart/ directory, which should give you a taste of the Cloud Identity-Aware Proxy API C++ client library API.
#include "google/cloud/iap/v1/identity_aware_proxy_o_auth_client.h"
#include "google/cloud/project.h"
#include <iostream>
int main(int argc, char* argv[]) try {
if (argc != 2) {
std::cerr << "Usage: " << argv[0] << " project-id\n";
return 1;
}
namespace iap = ::google::cloud::iap_v1;
auto client = iap::IdentityAwareProxyOAuthServiceClient(
iap::MakeIdentityAwareProxyOAuthServiceConnection());
google::cloud::iap::v1::ListBrandsRequest request;
request.set_parent(google::cloud::Project(argv[1]).FullName());
// ListBrands is not paginated, a single response includes all the "brands".
auto response = client.ListBrands(request);
if (!response) throw std::move(response).status();
std::cout << response->DebugString() << "\n";
return 0;
} catch (google::cloud::Status const& status) {
std::cerr << "google::cloud::Status thrown: " << status << "\n";
return 1;
}
Main classes
This 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.
The library also has other classes that provide helpers, configuration parameters, and infrastructure to mock the *Client classes when testing your application.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-14 UTC."],[[["\u003cp\u003eThis page provides documentation for the Cloud Identity-Aware Proxy API C++ client library, which is used to manage access to applications on Google Cloud Platform.\u003c/p\u003e\n"],["\u003cp\u003eThe latest version of the library is 2.37.0-rc, but it is important to note that the library does not follow Semantic Versioning.\u003c/p\u003e\n"],["\u003cp\u003eThe library offers multiple \u003ccode\u003e*Client\u003c/code\u003e classes, including \u003ccode\u003eiap_v1::IdentityAwareProxyAdminServiceClient\u003c/code\u003e and \u003ccode\u003eiap_v1::IdentityAwareProxyOAuthServiceClient\u003c/code\u003e, which expose RPCs as member functions.\u003c/p\u003e\n"],["\u003cp\u003eThe quickstart section showcases a code example using the \u003ccode\u003eIdentityAwareProxyOAuthServiceClient\u003c/code\u003e to list brands associated with a specific project.\u003c/p\u003e\n"],["\u003cp\u003eThe documentation covers various topics like error handling, overriding the default endpoint, changing authentication credentials, and configuring retry policies, all of which can be found in the "More Information" section.\u003c/p\u003e\n"]]],[],null,["Version latestkeyboard_arrow_down\n\n- [2.42.0-rc (latest)](/cpp/docs/reference/iap/latest)\n- [2.41.0](/cpp/docs/reference/iap/2.41.0)\n- [2.40.0](/cpp/docs/reference/iap/2.40.0)\n- [2.39.0](/cpp/docs/reference/iap/2.39.0)\n- [2.38.0](/cpp/docs/reference/iap/2.38.0)\n- [2.37.0](/cpp/docs/reference/iap/2.37.0)\n- [2.36.0](/cpp/docs/reference/iap/2.36.0)\n- [2.35.0](/cpp/docs/reference/iap/2.35.0)\n- [2.34.0](/cpp/docs/reference/iap/2.34.0)\n- [2.33.0](/cpp/docs/reference/iap/2.33.0)\n- [2.32.0](/cpp/docs/reference/iap/2.32.0)\n- [2.31.0](/cpp/docs/reference/iap/2.31.0)\n- [2.30.0](/cpp/docs/reference/iap/2.30.0)\n- [2.29.0](/cpp/docs/reference/iap/2.29.0)\n- [2.28.0](/cpp/docs/reference/iap/2.28.0)\n- [2.27.0](/cpp/docs/reference/iap/2.27.0)\n- [2.26.0](/cpp/docs/reference/iap/2.26.0)\n- [2.25.1](/cpp/docs/reference/iap/2.25.1)\n- [2.24.0](/cpp/docs/reference/iap/2.24.0)\n- [2.23.0](/cpp/docs/reference/iap/2.23.0)\n- [2.22.1](/cpp/docs/reference/iap/2.22.1)\n- [2.21.0](/cpp/docs/reference/iap/2.21.0)\n- [2.20.0](/cpp/docs/reference/iap/2.20.0)\n- [2.19.0](/cpp/docs/reference/iap/2.19.0)\n- [2.18.0](/cpp/docs/reference/iap/2.18.0)\n- [2.17.0](/cpp/docs/reference/iap/2.17.0)\n- [2.16.0](/cpp/docs/reference/iap/2.16.0)\n- [2.15.1](/cpp/docs/reference/iap/2.15.1)\n- [2.14.0](/cpp/docs/reference/iap/2.14.0)\n- [2.13.0](/cpp/docs/reference/iap/2.13.0)\n- [2.12.0](/cpp/docs/reference/iap/2.12.0)\n- [2.11.0](/cpp/docs/reference/iap/2.11.0) \n\nCloud Identity-Aware Proxy API C++ Client Library\n=================================================\n\nAn idiomatic C++ client library for the [Cloud Identity-Aware Proxy API](https://cloud.google.com/iap), a service to control access to applications running on Google Cloud Platform.\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/iap/quickstart/` directory, which should give you a taste of the Cloud Identity-Aware Proxy API C++ client library API. \n\n #include \"google/cloud/iap/v1/identity_aware_proxy_o_auth_client.h\"\n #include \"google/cloud/project.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 iap = ::google::cloud::iap_v1;\n auto client = iap::IdentityAwareProxyOAuthServiceClient(\n iap::MakeIdentityAwareProxyOAuthServiceConnection());\n\n google::cloud::iap::v1::ListBrandsRequest request;\n request.set_parent(google::cloud::Project(argv[1]).FullName());\n // ListBrands is not paginated, a single response includes all the \"brands\".\n auto response = client.ListBrands(request);\n if (!response) throw std::move(response).status();\n std::cout \u003c\u003c response-\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\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- [`iap_v1::IdentityAwareProxyAdminServiceClient`](/cpp/docs/reference/iap/latest/classgoogle_1_1cloud_1_1iap__v1_1_1IdentityAwareProxyAdminServiceClient)\n- [`iap_v1::IdentityAwareProxyOAuthServiceClient`](/cpp/docs/reference/iap/latest/classgoogle_1_1cloud_1_1iap__v1_1_1IdentityAwareProxyOAuthServiceClient)\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/iap/latest/iap-override-endpoint) - describes how to override the default endpoint.\n- [How to Override the Authentication Credentials](/cpp/docs/reference/iap/latest/iap-override-authentication) - describes how to change the authentication credentials used by the library.\n- [Override Retry, Backoff, and Idempotency Policies](/cpp/docs/reference/iap/latest/iap-override-retry) - describes how to change the default retry policies.\n- [Environment Variables](/cpp/docs/reference/iap/latest/iap-env) - describes environment variables that can configure the behavior of the library."]]