A number of environment variables can be used to configure the behavior of the library. There are also functions to configure this behavior in code. The environment variables are convenient when troubleshooting problems.
Endpoint Overrides
GOOGLE_CLOUD_CPP_AGENTS_ENDPOINT=... overrides the EndpointOption (which defaults to "
GOOGLE_CLOUD_CPP_CHANGELOGS_ENDPOINT=... overrides the EndpointOption (which defaults to "
GOOGLE_CLOUD_CPP_DEPLOYMENTS_ENDPOINT=... overrides the EndpointOption (which defaults to "
GOOGLE_CLOUD_CPP_DIALOGFLOW_ENVIRONMENT_ENDPOINT=... overrides the EndpointOption (which defaults to "
GOOGLE_CLOUD_CPP_DIALOGFLOW_VERSIONS_ENDPOINT=... overrides the EndpointOption (which defaults to "
GOOGLE_CLOUD_CPP_ENTITY_TYPES_ENDPOINT=... overrides the EndpointOption (which defaults to "
GOOGLE_CLOUD_CPP_EXPERIMENTS_ENDPOINT=... overrides the EndpointOption (which defaults to "
GOOGLE_CLOUD_CPP_FLOWS_ENDPOINT=... overrides the EndpointOption (which defaults to "
GOOGLE_CLOUD_CPP_GENERATORS_ENDPOINT=... overrides the EndpointOption (which defaults to "
GOOGLE_CLOUD_CPP_INTENTS_ENDPOINT=... overrides the EndpointOption (which defaults to "
GOOGLE_CLOUD_CPP_PAGES_ENDPOINT=... overrides the EndpointOption (which defaults to "
GOOGLE_CLOUD_CPP_SECURITY_SETTINGS_SERVICE_ENDPOINT=... overrides the EndpointOption (which defaults to "
GOOGLE_CLOUD_CPP_SESSIONS_ENDPOINT=... overrides the EndpointOption (which defaults to "
GOOGLE_CLOUD_CPP_SESSION_ENTITY_TYPES_ENDPOINT=... overrides the EndpointOption (which defaults to "
GOOGLE_CLOUD_CPP_TEST_CASES_ENDPOINT=... overrides the EndpointOption (which defaults to "
GOOGLE_CLOUD_CPP_TRANSITION_ROUTE_GROUPS_ENDPOINT=... overrides the EndpointOption (which defaults to "
GOOGLE_CLOUD_CPP_WEBHOOKS_ENDPOINT=... overrides the EndpointOption (which defaults to "
GOOGLE_CLOUD_CPP_ENABLE_TRACING=rpc: turns on tracing for most gRPC calls. The library injects an additional Stub decorator that prints each gRPC request and response. Unless you have configured your own logging backend, you should also set GOOGLE_CLOUD_CPP_ENABLE_CLOG to produce any output on the program's console.
See Also
google::cloud::LoggingComponentsOptionGOOGLE_CLOUD_CPP_TRACING_OPTIONS=...: modifies the behavior of gRPC tracing, including whether messages will be output on multiple lines, or whether string/bytes fields will be truncated.
See Also
google::cloud::GrpcTracingOptionsOptionGOOGLE_CLOUD_CPP_ENABLE_CLOG=yes: turns on logging in the library, basically the library always "logs" but the logging infrastructure has no backend to actually print anything until the application sets a backend or they set this environment variable.
[[["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\u003eThe latest release candidate version is 2.37.0-rc, and numerous previous versions are available, ranging from 2.36.0 down to 2.11.0.\u003c/p\u003e\n"],["\u003cp\u003eMultiple environment variables are available to override default endpoint settings for various Dialogflow CX services, such as \u003ccode\u003eGOOGLE_CLOUD_CPP_AGENTS_ENDPOINT\u003c/code\u003e and \u003ccode\u003eGOOGLE_CLOUD_CPP_WEBHOOKS_ENDPOINT\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003eGOOGLE_CLOUD_CPP_ENABLE_TRACING\u003c/code\u003e can be set to \u003ccode\u003erpc\u003c/code\u003e to enable gRPC call tracing, and \u003ccode\u003eGOOGLE_CLOUD_CPP_ENABLE_CLOG\u003c/code\u003e can be used to ensure output is shown on the program's console.\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003eGOOGLE_CLOUD_CPP_TRACING_OPTIONS\u003c/code\u003e allows customization of gRPC tracing behavior, including message formatting and field truncation, which can be seen in \u003ccode\u003egoogle::cloud::GrpcTracingOptionsOption\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003eGOOGLE_CLOUD_CPP_ENABLE_CLOG\u003c/code\u003e allows for logging in the library, and setting this variable will cause the logging infrastructure to start printing to the application.\u003c/p\u003e\n"]]],[],null,["Version latestkeyboard_arrow_down\n\n- [2.42.0-rc (latest)](/cpp/docs/reference/dialogflow_cx/latest/dialogflow_cx-env)\n- [2.41.0](/cpp/docs/reference/dialogflow_cx/2.41.0/dialogflow_cx-env)\n- [2.40.0](/cpp/docs/reference/dialogflow_cx/2.40.0/dialogflow_cx-env)\n- [2.39.0](/cpp/docs/reference/dialogflow_cx/2.39.0/dialogflow_cx-env)\n- [2.38.0](/cpp/docs/reference/dialogflow_cx/2.38.0/dialogflow_cx-env)\n- [2.37.0](/cpp/docs/reference/dialogflow_cx/2.37.0/dialogflow_cx-env)\n- [2.36.0](/cpp/docs/reference/dialogflow_cx/2.36.0/dialogflow_cx-env)\n- [2.35.0](/cpp/docs/reference/dialogflow_cx/2.35.0/dialogflow_cx-env)\n- [2.34.0](/cpp/docs/reference/dialogflow_cx/2.34.0/dialogflow_cx-env)\n- [2.33.0](/cpp/docs/reference/dialogflow_cx/2.33.0/dialogflow_cx-env)\n- [2.32.0](/cpp/docs/reference/dialogflow_cx/2.32.0/dialogflow_cx-env)\n- [2.31.0](/cpp/docs/reference/dialogflow_cx/2.31.0/dialogflow_cx-env)\n- [2.30.0](/cpp/docs/reference/dialogflow_cx/2.30.0/dialogflow_cx-env)\n- [2.29.0](/cpp/docs/reference/dialogflow_cx/2.29.0/dialogflow_cx-env)\n- [2.28.0](/cpp/docs/reference/dialogflow_cx/2.28.0/dialogflow_cx-env)\n- [2.27.0](/cpp/docs/reference/dialogflow_cx/2.27.0/dialogflow_cx-env)\n- [2.26.0](/cpp/docs/reference/dialogflow_cx/2.26.0/dialogflow_cx-env)\n- [2.25.1](/cpp/docs/reference/dialogflow_cx/2.25.1/dialogflow_cx-env)\n- [2.24.0](/cpp/docs/reference/dialogflow_cx/2.24.0/dialogflow_cx-env)\n- [2.23.0](/cpp/docs/reference/dialogflow_cx/2.23.0/dialogflow_cx-env)\n- [2.22.1](/cpp/docs/reference/dialogflow_cx/2.22.1/dialogflow_cx-env)\n- [2.21.0](/cpp/docs/reference/dialogflow_cx/2.21.0/dialogflow_cx-env)\n- [2.20.0](/cpp/docs/reference/dialogflow_cx/2.20.0/dialogflow_cx-env)\n- [2.19.0](/cpp/docs/reference/dialogflow_cx/2.19.0/dialogflow_cx-env)\n- [2.18.0](/cpp/docs/reference/dialogflow_cx/2.18.0/dialogflow_cx-env)\n- [2.17.0](/cpp/docs/reference/dialogflow_cx/2.17.0/dialogflow_cx-env)\n- [2.16.0](/cpp/docs/reference/dialogflow_cx/2.16.0/dialogflow_cx-env)\n- [2.15.1](/cpp/docs/reference/dialogflow_cx/2.15.1/dialogflow_cx-env)\n- [2.14.0](/cpp/docs/reference/dialogflow_cx/2.14.0/dialogflow_cx-env)\n- [2.13.0](/cpp/docs/reference/dialogflow_cx/2.13.0/dialogflow_cx-env)\n- [2.12.0](/cpp/docs/reference/dialogflow_cx/2.12.0/dialogflow_cx-env)\n- [2.11.0](/cpp/docs/reference/dialogflow_cx/2.11.0/dialogflow_cx-env) \n\nEnvironment Variables\n=====================\n\nA number of environment variables can be used to configure the behavior of the library. There are also functions to configure this behavior in code. The environment variables are convenient when troubleshooting problems.\n\nEndpoint Overrides\n------------------\n\n- `GOOGLE_CLOUD_CPP_AGENTS_ENDPOINT=...` overrides the `EndpointOption` (which defaults to \"\n- `GOOGLE_CLOUD_CPP_CHANGELOGS_ENDPOINT=...` overrides the `EndpointOption` (which defaults to \"\n- `GOOGLE_CLOUD_CPP_DEPLOYMENTS_ENDPOINT=...` overrides the `EndpointOption` (which defaults to \"\n- `GOOGLE_CLOUD_CPP_DIALOGFLOW_ENVIRONMENT_ENDPOINT=...` overrides the `EndpointOption` (which defaults to \"\n- `GOOGLE_CLOUD_CPP_DIALOGFLOW_VERSIONS_ENDPOINT=...` overrides the `EndpointOption` (which defaults to \"\n- `GOOGLE_CLOUD_CPP_ENTITY_TYPES_ENDPOINT=...` overrides the `EndpointOption` (which defaults to \"\n- `GOOGLE_CLOUD_CPP_EXPERIMENTS_ENDPOINT=...` overrides the `EndpointOption` (which defaults to \"\n- `GOOGLE_CLOUD_CPP_FLOWS_ENDPOINT=...` overrides the `EndpointOption` (which defaults to \"\n- `GOOGLE_CLOUD_CPP_GENERATORS_ENDPOINT=...` overrides the `EndpointOption` (which defaults to \"\n- `GOOGLE_CLOUD_CPP_INTENTS_ENDPOINT=...` overrides the `EndpointOption` (which defaults to \"\n- `GOOGLE_CLOUD_CPP_PAGES_ENDPOINT=...` overrides the `EndpointOption` (which defaults to \"\n- `GOOGLE_CLOUD_CPP_SECURITY_SETTINGS_SERVICE_ENDPOINT=...` overrides the `EndpointOption` (which defaults to \"\n- `GOOGLE_CLOUD_CPP_SESSIONS_ENDPOINT=...` overrides the `EndpointOption` (which defaults to \"\n- `GOOGLE_CLOUD_CPP_SESSION_ENTITY_TYPES_ENDPOINT=...` overrides the `EndpointOption` (which defaults to \"\n- `GOOGLE_CLOUD_CPP_TEST_CASES_ENDPOINT=...` overrides the `EndpointOption` (which defaults to \"\n- `GOOGLE_CLOUD_CPP_TRANSITION_ROUTE_GROUPS_ENDPOINT=...` overrides the `EndpointOption` (which defaults to \"\n- `GOOGLE_CLOUD_CPP_WEBHOOKS_ENDPOINT=...` overrides the `EndpointOption` (which defaults to \"\n\n###### See Also\n\n[`google::cloud::EndpointOption`](https://cloud.google.com/cpp/docs/reference/common/latest/structgoogle_1_1cloud_1_1EndpointOption.html)\n\nLogging\n-------\n\n`GOOGLE_CLOUD_CPP_ENABLE_TRACING=rpc`: turns on tracing for most gRPC calls. The library injects an additional Stub decorator that prints each gRPC request and response. Unless you have configured your own logging backend, you should also set `GOOGLE_CLOUD_CPP_ENABLE_CLOG` to produce any output on the program's console.\n\n###### See Also\n\n[`google::cloud::LoggingComponentsOption`](https://cloud.google.com/cpp/docs/reference/common/latest/structgoogle_1_1cloud_1_1LoggingComponentsOption.html)`GOOGLE_CLOUD_CPP_TRACING_OPTIONS=...`: modifies the behavior of gRPC tracing, including whether messages will be output on multiple lines, or whether string/bytes fields will be truncated.\n\n###### See Also\n\n[`google::cloud::GrpcTracingOptionsOption`](https://cloud.google.com/cpp/docs/reference/common/latest/structgoogle_1_1cloud_1_1GrpcTracingOptionsOption.html)`GOOGLE_CLOUD_CPP_ENABLE_CLOG=yes`: turns on logging in the library, basically the library always \"logs\" but the logging infrastructure has no backend to actually print anything until the application sets a backend or they set this environment variable.\n\n###### See Also\n\n[`google::cloud::LogBackend`](https://cloud.google.com/cpp/docs/reference/common/latest/classgoogle_1_1cloud_1_1LogBackend.html)\n\n###### See Also\n\n[`google::cloud::LogSink`](https://cloud.google.com/cpp/docs/reference/common/latest/classgoogle_1_1cloud_1_1LogSink.html)\n\nSetting the Default Project\n---------------------------\n\n`GOOGLE_CLOUD_PROJECT=...`: is used in examples and integration tests to configure the GCP project. This has no effect in the library."]]
