Google.Cloud.Retail.V2is a.NET client library for theRetail API.
Note: early access users only
Some features exposed by this package are currently protected by an allow-list, and will not
work for customers who are not registered in the early access programme.
Note:
This documentation is for version2.14.0of the library.
Some samples may not work with other versions.
Installation
Install theGoogle.Cloud.Retail.V2package from NuGet. Add it to
your project in the normal way (for example by right-clicking on the
project in Visual Studio and choosing "Manage NuGet Packages...").
Authentication
When running on Google Cloud, no action needs to be taken to authenticate.
Otherwise, the simplest way of authenticating your API calls is to
set up Application Default Credentials.
The credentials will automatically be used to authenticate. SeeSet up Application Default Credentialsfor more details.
Getting started
All operations are performed through the following client classes:
Create a client instance by calling the staticCreateorCreateAsyncmethods. Alternatively,
use the builder class associated with each client class (e.g. AnalyticsServiceClientBuilder for AnalyticsServiceClient)
as an easy way of specifying custom credentials, settings, or a custom endpoint. Clients are thread-safe,
and we recommend using a single instance across your entire application unless you have a particular need
to configure multiple client objects separately.
Using the REST (HTTP/1.1) transport
This library defaults to performing RPCs usinggRPCusing the binaryProtocol Bufferwire format.
However, it also supports HTTP/1.1 and JSON, for situations where gRPC doesn't work as desired. (This is typically due to an incompatible proxy
or other network issue.) To create a client using HTTP/1.1, specify aRestGrpcAdapterreference for theGrpcAdapterproperty in the client builder.
Sample code:
var client = new AnalyticsServiceClientBuilder
{
GrpcAdapter = RestGrpcAdapter.Default
}.Build();
[[["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\u003e\u003ccode\u003eGoogle.Cloud.Retail.V2\u003c/code\u003e is a .NET client library for the Retail API, designed for early access users who have been registered in the program.\u003c/p\u003e\n"],["\u003cp\u003eThe latest version of the library is 2.12.0, with documentation available for multiple versions ranging from 1.0.0 to the current release.\u003c/p\u003e\n"],["\u003cp\u003eInstallation is through NuGet, and the library is automatically authenticated when running on Google Cloud; otherwise, Application Default Credentials are the recommended method.\u003c/p\u003e\n"],["\u003cp\u003eThe library supports gRPC as the default transport mechanism but can also use HTTP/1.1 with JSON by specifying a \u003ccode\u003eRestGrpcAdapter\u003c/code\u003e in the client builder.\u003c/p\u003e\n"],["\u003cp\u003eAll operations are managed through multiple client classes like \u003ccode\u003eAnalyticsServiceClient\u003c/code\u003e, \u003ccode\u003eCatalogServiceClient\u003c/code\u003e, and \u003ccode\u003eUserEventServiceClient\u003c/code\u003e, all of which can be created using static \u003ccode\u003eCreate\u003c/code\u003e or \u003ccode\u003eCreateAsync\u003c/code\u003e methods or through their respective builder classes.\u003c/p\u003e\n"]]],[],null,["Version latestkeyboard_arrow_down\n\n- [2.14.0 (latest)](/dotnet/docs/reference/Google.Cloud.Retail.V2/latest)\n- [2.13.0](/dotnet/docs/reference/Google.Cloud.Retail.V2/2.13.0)\n- [2.12.0](/dotnet/docs/reference/Google.Cloud.Retail.V2/2.12.0)\n- [2.11.0](/dotnet/docs/reference/Google.Cloud.Retail.V2/2.11.0)\n- [2.10.0](/dotnet/docs/reference/Google.Cloud.Retail.V2/2.10.0)\n- [2.9.0](/dotnet/docs/reference/Google.Cloud.Retail.V2/2.9.0)\n- [2.8.0](/dotnet/docs/reference/Google.Cloud.Retail.V2/2.8.0)\n- [2.7.0](/dotnet/docs/reference/Google.Cloud.Retail.V2/2.7.0)\n- [2.6.0](/dotnet/docs/reference/Google.Cloud.Retail.V2/2.6.0)\n- [2.5.0](/dotnet/docs/reference/Google.Cloud.Retail.V2/2.5.0)\n- [2.4.0](/dotnet/docs/reference/Google.Cloud.Retail.V2/2.4.0)\n- [2.3.0](/dotnet/docs/reference/Google.Cloud.Retail.V2/2.3.0)\n- [2.2.0](/dotnet/docs/reference/Google.Cloud.Retail.V2/2.2.0)\n- [2.1.0](/dotnet/docs/reference/Google.Cloud.Retail.V2/2.1.0)\n- [2.0.0](/dotnet/docs/reference/Google.Cloud.Retail.V2/2.0.0)\n- [1.6.0](/dotnet/docs/reference/Google.Cloud.Retail.V2/1.6.0)\n- [1.5.0](/dotnet/docs/reference/Google.Cloud.Retail.V2/1.5.0)\n- [1.4.0](/dotnet/docs/reference/Google.Cloud.Retail.V2/1.4.0)\n- [1.3.0](/dotnet/docs/reference/Google.Cloud.Retail.V2/1.3.0)\n- [1.2.0](/dotnet/docs/reference/Google.Cloud.Retail.V2/1.2.0)\n- [1.1.0](/dotnet/docs/reference/Google.Cloud.Retail.V2/1.1.0)\n- [1.0.0](/dotnet/docs/reference/Google.Cloud.Retail.V2/1.0.0) \n\nGoogle.Cloud.Retail.V2\n======================\n\n`Google.Cloud.Retail.V2` is a.NET client library for the [Retail API](https://cloud.google.com/retail/docs).\n\nNote: early access users only\n-----------------------------\n\nSome features exposed by this package are currently protected by an allow-list, and will not\nwork for customers who are not registered in the early access programme.\n\nPlease use the [contact page](https://cloud.google.com/contact) to\napply for access.\n\nNote:\nThis documentation is for version `2.14.0` of the library.\nSome samples may not work with other versions.\n\nInstallation\n------------\n\nInstall the `Google.Cloud.Retail.V2` package from NuGet. Add it to\nyour project in the normal way (for example by right-clicking on the\nproject in Visual Studio and choosing \"Manage NuGet Packages...\").\n\nAuthentication\n--------------\n\nWhen running on Google Cloud, no action needs to be taken to authenticate.\n\nOtherwise, the simplest way of authenticating your API calls is to\nset up Application Default Credentials.\nThe credentials will automatically be used to authenticate. See\n[Set up Application Default Credentials](https://cloud.google.com/docs/authentication/provide-credentials-adc) for more details.\n\nGetting started\n---------------\n\nAll operations are performed through the following client classes:\n\n- [AnalyticsServiceClient](/dotnet/docs/reference/Google.Cloud.Retail.V2/latest/Google.Cloud.Retail.V2.AnalyticsServiceClient)\n- [CatalogServiceClient](/dotnet/docs/reference/Google.Cloud.Retail.V2/latest/Google.Cloud.Retail.V2.CatalogServiceClient)\n- [CompletionServiceClient](/dotnet/docs/reference/Google.Cloud.Retail.V2/latest/Google.Cloud.Retail.V2.CompletionServiceClient)\n- [ControlServiceClient](/dotnet/docs/reference/Google.Cloud.Retail.V2/latest/Google.Cloud.Retail.V2.ControlServiceClient)\n- [GenerativeQuestionServiceClient](/dotnet/docs/reference/Google.Cloud.Retail.V2/latest/Google.Cloud.Retail.V2.GenerativeQuestionServiceClient)\n- [ModelServiceClient](/dotnet/docs/reference/Google.Cloud.Retail.V2/latest/Google.Cloud.Retail.V2.ModelServiceClient)\n- [PredictionServiceClient](/dotnet/docs/reference/Google.Cloud.Retail.V2/latest/Google.Cloud.Retail.V2.PredictionServiceClient)\n- [ProductServiceClient](/dotnet/docs/reference/Google.Cloud.Retail.V2/latest/Google.Cloud.Retail.V2.ProductServiceClient)\n- [SearchServiceClient](/dotnet/docs/reference/Google.Cloud.Retail.V2/latest/Google.Cloud.Retail.V2.SearchServiceClient)\n- [ServingConfigServiceClient](/dotnet/docs/reference/Google.Cloud.Retail.V2/latest/Google.Cloud.Retail.V2.ServingConfigServiceClient)\n- [UserEventServiceClient](/dotnet/docs/reference/Google.Cloud.Retail.V2/latest/Google.Cloud.Retail.V2.UserEventServiceClient)\n\nCreate a client instance by calling the static `Create` or `CreateAsync` methods. Alternatively,\nuse the builder class associated with each client class (e.g. AnalyticsServiceClientBuilder for AnalyticsServiceClient)\nas an easy way of specifying custom credentials, settings, or a custom endpoint. Clients are thread-safe,\nand we recommend using a single instance across your entire application unless you have a particular need\nto configure multiple client objects separately.\n\n### Using the REST (HTTP/1.1) transport\n\nThis library defaults to performing RPCs using [gRPC](https://grpc.io/) using the binary [Protocol Buffer](https://protobuf.dev) wire format.\nHowever, it also supports HTTP/1.1 and JSON, for situations where gRPC doesn't work as desired. (This is typically due to an incompatible proxy\nor other network issue.) To create a client using HTTP/1.1, specify a `RestGrpcAdapter` reference for the `GrpcAdapter` property in the client builder.\nSample code: \n\n var client = new AnalyticsServiceClientBuilder\n {\n GrpcAdapter = RestGrpcAdapter.Default\n }.Build();\n\nFor more details, see the [transport selection](https://cloud.google.com/dotnet/docs/reference/help/transports) page."]]