An idiomatic C++ client library for the Dialogflow ES API, a service to build conversational interfaces (for example, chatbots, and voice-powered apps and devices). There are two editions of Dialogflow, this library supports the ES edition.
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/dialogflow_es/quickstart/ directory, which should give you a taste of the Dialogflow API C++ client library API.
#include "google/cloud/dialogflow_es/agents_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 dialogflow_es = ::google::cloud::dialogflow_es;
auto client =
dialogflow_es::AgentsClient(dialogflow_es::MakeAgentsConnection());
auto const project = google::cloud::Project(argv[1]);
for (auto a : client.SearchAgents(project.FullName())) {
if (!a) throw std::move(a).status();
std::cout << a->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"]],[["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 2025-09-09 UTC."],[[["\u003cp\u003eThis webpage details the Dialogflow ES API C++ client library, which is used to build conversational interfaces like chatbots and voice-powered applications, supporting the ES edition of Dialogflow.\u003c/p\u003e\n"],["\u003cp\u003eThe latest version of this library is 2.37.0-rc, and a variety of previous versions are also accessible, starting with 2.36.0 and down to version 2.11.0.\u003c/p\u003e\n"],["\u003cp\u003eThe library includes multiple \u003ccode\u003e*Client\u003c/code\u003e classes, such as \u003ccode\u003eAgentsClient\u003c/code\u003e, \u003ccode\u003eAnswerRecordsClient\u003c/code\u003e, and \u003ccode\u003eContextsClient\u003c/code\u003e, each offering member functions for the corresponding service's RPCs.\u003c/p\u003e\n"],["\u003cp\u003eAlthough the library is generally available (GA), it does not follow Semantic Versioning guidelines, and provides users with multiple ways to customize features such as error handling, endpoints, authentication credentials, retry policies, and environment variables.\u003c/p\u003e\n"],["\u003cp\u003eThe Quickstart guide provides a code example utilizing \u003ccode\u003eAgentsClient\u003c/code\u003e to search agents for a project.\u003c/p\u003e\n"]]],[],null,["Version latestkeyboard_arrow_down\n\n- [2.42.0-rc (latest)](/cpp/docs/reference/dialogflow_es/latest)\n- [2.41.0](/cpp/docs/reference/dialogflow_es/2.41.0)\n- [2.40.0](/cpp/docs/reference/dialogflow_es/2.40.0)\n- [2.39.0](/cpp/docs/reference/dialogflow_es/2.39.0)\n- [2.38.0](/cpp/docs/reference/dialogflow_es/2.38.0)\n- [2.37.0](/cpp/docs/reference/dialogflow_es/2.37.0)\n- [2.36.0](/cpp/docs/reference/dialogflow_es/2.36.0)\n- [2.35.0](/cpp/docs/reference/dialogflow_es/2.35.0)\n- [2.34.0](/cpp/docs/reference/dialogflow_es/2.34.0)\n- [2.33.0](/cpp/docs/reference/dialogflow_es/2.33.0)\n- [2.32.0](/cpp/docs/reference/dialogflow_es/2.32.0)\n- [2.31.0](/cpp/docs/reference/dialogflow_es/2.31.0)\n- [2.30.0](/cpp/docs/reference/dialogflow_es/2.30.0)\n- [2.29.0](/cpp/docs/reference/dialogflow_es/2.29.0)\n- [2.28.0](/cpp/docs/reference/dialogflow_es/2.28.0)\n- [2.27.0](/cpp/docs/reference/dialogflow_es/2.27.0)\n- [2.26.0](/cpp/docs/reference/dialogflow_es/2.26.0)\n- [2.25.1](/cpp/docs/reference/dialogflow_es/2.25.1)\n- [2.24.0](/cpp/docs/reference/dialogflow_es/2.24.0)\n- [2.23.0](/cpp/docs/reference/dialogflow_es/2.23.0)\n- [2.22.1](/cpp/docs/reference/dialogflow_es/2.22.1)\n- [2.21.0](/cpp/docs/reference/dialogflow_es/2.21.0)\n- [2.20.0](/cpp/docs/reference/dialogflow_es/2.20.0)\n- [2.19.0](/cpp/docs/reference/dialogflow_es/2.19.0)\n- [2.18.0](/cpp/docs/reference/dialogflow_es/2.18.0)\n- [2.17.0](/cpp/docs/reference/dialogflow_es/2.17.0)\n- [2.16.0](/cpp/docs/reference/dialogflow_es/2.16.0)\n- [2.15.1](/cpp/docs/reference/dialogflow_es/2.15.1)\n- [2.14.0](/cpp/docs/reference/dialogflow_es/2.14.0)\n- [2.13.0](/cpp/docs/reference/dialogflow_es/2.13.0)\n- [2.12.0](/cpp/docs/reference/dialogflow_es/2.12.0)\n- [2.11.0](/cpp/docs/reference/dialogflow_es/2.11.0) \n\nDialogflow ES API C++ Client Library\n====================================\n\nAn idiomatic C++ client library for the [Dialogflow ES API](https://cloud.google.com/dialogflow/es/docs), a service to build conversational interfaces (for example, chatbots, and voice-powered apps and devices). There are [two editions](https://cloud.google.com/dialogflow/docs/editions) of Dialogflow, this library supports the ES edition.\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/dialogflow_es/quickstart/` directory, which should give you a taste of the Dialogflow API C++ client library API. \n\n #include \"google/cloud/dialogflow_es/agents_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 dialogflow_es = ::google::cloud::dialogflow_es;\n auto client =\n dialogflow_es::AgentsClient(dialogflow_es::MakeAgentsConnection());\n\n auto const project = google::cloud::Project(argv[1]);\n for (auto a : client.SearchAgents(project.FullName())) {\n if (!a) throw std::move(a).status();\n std::cout \u003c\u003c a-\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 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- [`dialogflow_es::AgentsClient`](/cpp/docs/reference/dialogflow_es/latest/classgoogle_1_1cloud_1_1dialogflow__es_1_1AgentsClient)\n- [`dialogflow_es::AnswerRecordsClient`](/cpp/docs/reference/dialogflow_es/latest/classgoogle_1_1cloud_1_1dialogflow__es_1_1AnswerRecordsClient)\n- [`dialogflow_es::ContextsClient`](/cpp/docs/reference/dialogflow_es/latest/classgoogle_1_1cloud_1_1dialogflow__es_1_1ContextsClient)\n- [`dialogflow_es::ConversationDatasetsClient`](/cpp/docs/reference/dialogflow_es/latest/classgoogle_1_1cloud_1_1dialogflow__es_1_1ConversationDatasetsClient)\n- [`dialogflow_es::ConversationModelsClient`](/cpp/docs/reference/dialogflow_es/latest/classgoogle_1_1cloud_1_1dialogflow__es_1_1ConversationModelsClient)\n- [`dialogflow_es::ConversationProfilesClient`](/cpp/docs/reference/dialogflow_es/latest/classgoogle_1_1cloud_1_1dialogflow__es_1_1ConversationProfilesClient)\n- [`dialogflow_es::ConversationsClient`](/cpp/docs/reference/dialogflow_es/latest/classgoogle_1_1cloud_1_1dialogflow__es_1_1ConversationsClient)\n- [`dialogflow_es::DocumentsClient`](/cpp/docs/reference/dialogflow_es/latest/classgoogle_1_1cloud_1_1dialogflow__es_1_1DocumentsClient)\n- [`dialogflow_es::EncryptionSpecServiceClient`](/cpp/docs/reference/dialogflow_es/latest/classgoogle_1_1cloud_1_1dialogflow__es_1_1EncryptionSpecServiceClient)\n- [`dialogflow_es::EntityTypesClient`](/cpp/docs/reference/dialogflow_es/latest/classgoogle_1_1cloud_1_1dialogflow__es_1_1EntityTypesClient)\n- [`dialogflow_es::EnvironmentsClient`](/cpp/docs/reference/dialogflow_es/latest/classgoogle_1_1cloud_1_1dialogflow__es_1_1EnvironmentsClient)\n- [`dialogflow_es::FulfillmentsClient`](/cpp/docs/reference/dialogflow_es/latest/classgoogle_1_1cloud_1_1dialogflow__es_1_1FulfillmentsClient)\n- [`dialogflow_es::GeneratorsClient`](/cpp/docs/reference/dialogflow_es/latest/classgoogle_1_1cloud_1_1dialogflow__es_1_1GeneratorsClient)\n- [`dialogflow_es::IntentsClient`](/cpp/docs/reference/dialogflow_es/latest/classgoogle_1_1cloud_1_1dialogflow__es_1_1IntentsClient)\n- [`dialogflow_es::KnowledgeBasesClient`](/cpp/docs/reference/dialogflow_es/latest/classgoogle_1_1cloud_1_1dialogflow__es_1_1KnowledgeBasesClient)\n- [`dialogflow_es::ParticipantsClient`](/cpp/docs/reference/dialogflow_es/latest/classgoogle_1_1cloud_1_1dialogflow__es_1_1ParticipantsClient)\n- [`dialogflow_es::SessionEntityTypesClient`](/cpp/docs/reference/dialogflow_es/latest/classgoogle_1_1cloud_1_1dialogflow__es_1_1SessionEntityTypesClient)\n- [`dialogflow_es::SessionsClient`](/cpp/docs/reference/dialogflow_es/latest/classgoogle_1_1cloud_1_1dialogflow__es_1_1SessionsClient)\n- [`dialogflow_es::VersionsClient`](/cpp/docs/reference/dialogflow_es/latest/classgoogle_1_1cloud_1_1dialogflow__es_1_1VersionsClient)\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/dialogflow_es/latest/dialogflow_es-override-endpoint) - describes how to override the default endpoint.\n- [How to Override the Authentication Credentials](/cpp/docs/reference/dialogflow_es/latest/dialogflow_es-override-authentication) - describes how to change the authentication credentials used by the library.\n- [Override Retry, Backoff, and Idempotency Policies](/cpp/docs/reference/dialogflow_es/latest/dialogflow_es-override-retry) - describes how to change the default retry policies.\n- [Environment Variables](/cpp/docs/reference/dialogflow_es/latest/dialogflow_es-env) - describes environment variables that can configure the behavior of the library."]]