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_BUDGET_SERVICE_ENDPOINT=...overrides theEndpointOption(which defaults to "billingbudgets.googleapis.com") used byMakeBudgetServiceConnection().
GOOGLE_CLOUD_CPP_CLOUD_BILLING_ENDPOINT=...overrides theEndpointOption(which defaults to "cloudbilling.googleapis.com") used byMakeCloudBillingConnection().
GOOGLE_CLOUD_CPP_CLOUD_CATALOG_ENDPOINT=...overrides theEndpointOption(which defaults to "cloudbilling.googleapis.com") used byMakeCloudCatalogConnection().
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 setGOOGLE_CLOUD_CPP_ENABLE_CLOGto 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\u003eThis document provides reference information for multiple versions of a C++ billing library, ranging from version 2.11.0 up to the latest release candidate 2.37.0-rc.\u003c/p\u003e\n"],["\u003cp\u003eThe document details how to configure the library's behavior using environment variables, especially when troubleshooting, including the ability to set custom endpoints for budget, cloud billing, and cloud catalog services.\u003c/p\u003e\n"],["\u003cp\u003eLogging and tracing functionalities can be activated and customized using several environment variables, such as \u003ccode\u003eGOOGLE_CLOUD_CPP_ENABLE_TRACING\u003c/code\u003e, \u003ccode\u003eGOOGLE_CLOUD_CPP_TRACING_OPTIONS\u003c/code\u003e, and \u003ccode\u003eGOOGLE_CLOUD_CPP_ENABLE_CLOG\u003c/code\u003e, allowing for detailed inspection of gRPC calls and program output.\u003c/p\u003e\n"],["\u003cp\u003eSetting the default project through the environment variable \u003ccode\u003eGOOGLE_CLOUD_PROJECT\u003c/code\u003e will have no effect on the library, but is useful for examples and integration testing.\u003c/p\u003e\n"]]],[],null,["Version 2.32.0keyboard_arrow_down\n\n- [2.42.0-rc (latest)](/cpp/docs/reference/billing/latest/billing-env)\n- [2.41.0](/cpp/docs/reference/billing/2.41.0/billing-env)\n- [2.40.0](/cpp/docs/reference/billing/2.40.0/billing-env)\n- [2.39.0](/cpp/docs/reference/billing/2.39.0/billing-env)\n- [2.38.0](/cpp/docs/reference/billing/2.38.0/billing-env)\n- [2.37.0](/cpp/docs/reference/billing/2.37.0/billing-env)\n- [2.36.0](/cpp/docs/reference/billing/2.36.0/billing-env)\n- [2.35.0](/cpp/docs/reference/billing/2.35.0/billing-env)\n- [2.34.0](/cpp/docs/reference/billing/2.34.0/billing-env)\n- [2.33.0](/cpp/docs/reference/billing/2.33.0/billing-env)\n- [2.32.0](/cpp/docs/reference/billing/2.32.0/billing-env)\n- [2.31.0](/cpp/docs/reference/billing/2.31.0/billing-env)\n- [2.30.0](/cpp/docs/reference/billing/2.30.0/billing-env)\n- [2.29.0](/cpp/docs/reference/billing/2.29.0/billing-env)\n- [2.28.0](/cpp/docs/reference/billing/2.28.0/billing-env)\n- [2.27.0](/cpp/docs/reference/billing/2.27.0/billing-env)\n- [2.26.0](/cpp/docs/reference/billing/2.26.0/billing-env)\n- [2.25.1](/cpp/docs/reference/billing/2.25.1/billing-env)\n- [2.24.0](/cpp/docs/reference/billing/2.24.0/billing-env)\n- [2.23.0](/cpp/docs/reference/billing/2.23.0/billing-env)\n- [2.22.1](/cpp/docs/reference/billing/2.22.1/billing-env)\n- [2.21.0](/cpp/docs/reference/billing/2.21.0/billing-env)\n- [2.20.0](/cpp/docs/reference/billing/2.20.0/billing-env)\n- [2.19.0](/cpp/docs/reference/billing/2.19.0/billing-env)\n- [2.18.0](/cpp/docs/reference/billing/2.18.0/billing-env)\n- [2.17.0](/cpp/docs/reference/billing/2.17.0/billing-env)\n- [2.16.0](/cpp/docs/reference/billing/2.16.0/billing-env)\n- [2.15.1](/cpp/docs/reference/billing/2.15.1/billing-env)\n- [2.14.0](/cpp/docs/reference/billing/2.14.0/billing-env)\n- [2.13.0](/cpp/docs/reference/billing/2.13.0/billing-env)\n- [2.12.0](/cpp/docs/reference/billing/2.12.0/billing-env)\n- [2.11.0](/cpp/docs/reference/billing/2.11.0/billing-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_BUDGET_SERVICE_ENDPOINT=...` overrides the `EndpointOption` (which defaults to \"billingbudgets.googleapis.com\") used by `MakeBudgetServiceConnection()`.\n- `GOOGLE_CLOUD_CPP_CLOUD_BILLING_ENDPOINT=...` overrides the `EndpointOption` (which defaults to \"cloudbilling.googleapis.com\") used by `MakeCloudBillingConnection()`.\n- `GOOGLE_CLOUD_CPP_CLOUD_CATALOG_ENDPOINT=...` overrides the `EndpointOption` (which defaults to \"cloudbilling.googleapis.com\") used by `MakeCloudCatalogConnection()`.\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."]]
