An idiomatic C++ client library for the Cloud AutoML API, a service to train high-quality custom machine learning models with minimum effort and machine learning expertise.
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/automl/quickstart/ directory, which should give you a taste of the Cloud AutoML API C++ client library API.
This library offers multiple *Client classes, which are listed below. Each one of these classes exposes all the RPCs for a gRPC service as member functions of the class. This library groups multiple gRPC 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.
The library automatically retries requests that fail with transient errors, and uses exponential backoff to 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"]],[["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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-14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 webpage provides documentation for the Cloud AutoML API C++ Client Library, which enables users to train custom machine learning models with minimal effort.\u003c/p\u003e\n"],["\u003cp\u003eThe latest release candidate for the library is version 2.37.0-rc, with multiple previous versions available for reference, starting from 2.11.0 and up.\u003c/p\u003e\n"],["\u003cp\u003eThe library includes \u003ccode\u003eAutoMlClient\u003c/code\u003e and \u003ccode\u003ePredictionServiceClient\u003c/code\u003e classes, which expose all the RPCs for their corresponding gRPC services, making it easy to interact with the Cloud AutoML API.\u003c/p\u003e\n"],["\u003cp\u003eThe C++ client libraries do not follow Semantic Versioning, and the library automatically retries requests with transient errors using exponential backoff.\u003c/p\u003e\n"],["\u003cp\u003eUsers can easily override the default settings of the library, including the endpoint and authentication credentials, and the library's behavior can be configured using environment variables.\u003c/p\u003e\n"]]],[],null,["Version 2.11.0keyboard_arrow_down\n\n- [2.42.0-rc (latest)](/cpp/docs/reference/automl/latest)\n- [2.41.0](/cpp/docs/reference/automl/2.41.0)\n- [2.40.0](/cpp/docs/reference/automl/2.40.0)\n- [2.39.0](/cpp/docs/reference/automl/2.39.0)\n- [2.38.0](/cpp/docs/reference/automl/2.38.0)\n- [2.37.0](/cpp/docs/reference/automl/2.37.0)\n- [2.36.0](/cpp/docs/reference/automl/2.36.0)\n- [2.35.0](/cpp/docs/reference/automl/2.35.0)\n- [2.34.0](/cpp/docs/reference/automl/2.34.0)\n- [2.33.0](/cpp/docs/reference/automl/2.33.0)\n- [2.32.0](/cpp/docs/reference/automl/2.32.0)\n- [2.31.0](/cpp/docs/reference/automl/2.31.0)\n- [2.30.0](/cpp/docs/reference/automl/2.30.0)\n- [2.29.0](/cpp/docs/reference/automl/2.29.0)\n- [2.28.0](/cpp/docs/reference/automl/2.28.0)\n- [2.27.0](/cpp/docs/reference/automl/2.27.0)\n- [2.26.0](/cpp/docs/reference/automl/2.26.0)\n- [2.25.1](/cpp/docs/reference/automl/2.25.1)\n- [2.24.0](/cpp/docs/reference/automl/2.24.0)\n- [2.23.0](/cpp/docs/reference/automl/2.23.0)\n- [2.22.1](/cpp/docs/reference/automl/2.22.1)\n- [2.21.0](/cpp/docs/reference/automl/2.21.0)\n- [2.20.0](/cpp/docs/reference/automl/2.20.0)\n- [2.19.0](/cpp/docs/reference/automl/2.19.0)\n- [2.18.0](/cpp/docs/reference/automl/2.18.0)\n- [2.17.0](/cpp/docs/reference/automl/2.17.0)\n- [2.16.0](/cpp/docs/reference/automl/2.16.0)\n- [2.15.1](/cpp/docs/reference/automl/2.15.1)\n- [2.14.0](/cpp/docs/reference/automl/2.14.0)\n- [2.13.0](/cpp/docs/reference/automl/2.13.0)\n- [2.12.0](/cpp/docs/reference/automl/2.12.0)\n- [2.11.0](/cpp/docs/reference/automl/2.11.0) \n\nCloud AutoML API C++ Client Library\n===================================\n\nAn idiomatic C++ client library for the [Cloud AutoML API](https://cloud.google.com/automl), a service to train high-quality custom machine learning models with minimum effort and machine learning expertise.\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/automl/quickstart/` directory, which should give you a taste of the Cloud AutoML API C++ client library API. \n\n #include \"google/cloud/automl/v1/auto_ml_client.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 automl = ::google::cloud::automl_v1;\n auto client = automl::AutoMlClient(automl::MakeAutoMlConnection());\n\n auto const parent =\n std::string{\"projects/\"} + argv[1] + \"/locations/\" + argv[2];\n for (auto m : client.ListModels(parent)) {\n if (!m) throw std::move(m).status();\n std::cout \u003c\u003c m-\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 gRPC `service` as member functions of the class. This library groups multiple gRPC 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- [`automl_v1::AutoMlClient`](/cpp/docs/reference/automl/2.11.0/classgoogle_1_1cloud_1_1automl__v1_1_1AutoMlClient)\n- [`automl_v1::PredictionServiceClient`](/cpp/docs/reference/automl/2.11.0/classgoogle_1_1cloud_1_1automl__v1_1_1PredictionServiceClient)\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/automl/2.11.0/automl-override-endpoint) - describes how to override the default endpoint.\n- [How to Override the Authentication Credentials](/cpp/docs/reference/automl/2.11.0/automl-override-authentication) - describes how to change the authentication credentials used by the library.\n- [Environment Variables](/cpp/docs/reference/automl/2.11.0/automl-env) - describes environment variables that can configure the behavior of the library."]]