# AspireOpenAIClientBuilderChatClientExtensions

- Kind: `class`
- Package: [Aspire.OpenAI](/reference/api/csharp/aspire.openai.md)
- Version: `13.3.0-preview.1.26254.5`
- Namespace: `Microsoft.Extensions.Hosting`
- Target framework: `net10.0`
- Source: [GitHub](https://github.com/microsoft/aspire/blob/5bd693ae1897dee5e2ce71c2cc08879c1c7eff51/src/Components/Aspire.OpenAI/AspireOpenAIClientBuilderChatClientExtensions.cs)

Provides extension methods for registering `AI.IChatClient` as a singleton in the services provided by the `Hosting.IHostApplicationBuilder`.

## Definition

```csharp
namespace Microsoft.Extensions.Hosting;

public static class AspireOpenAIClientBuilderChatClientExtensions
{
    // ...
}
```

## Methods

- [AddChatClient(AspireOpenAIClientBuilder, string?)](/reference/api/csharp/aspire.openai/aspireopenaiclientbuilderchatclientextensions/methods.md#addchatclient-aspireopenaiclientbuilder-string) : `ChatClientBuilder` `extension` -- Registers a singleton `AI.IChatClient` in the services provided by the `builder`.
- [AddKeyedChatClient(AspireOpenAIClientBuilder, string, string?)](/reference/api/csharp/aspire.openai/aspireopenaiclientbuilderchatclientextensions/methods.md#addkeyedchatclient-aspireopenaiclientbuilder-string-string) : `ChatClientBuilder` `extension` -- Registers a keyed singleton `AI.IChatClient` in the services provided by the `builder`.