# OpenAIExtensions

- Kind: `class`
- Package: [Aspire.Hosting.OpenAI](/reference/api/csharp/aspire.hosting.openai.md)
- Version: `13.4.0`
- Namespace: `Aspire.Hosting`
- Target framework: `net8.0`
- Source: [GitHub](https://github.com/microsoft/aspire/blob/cbc352350f1a9bafbaff10d14a2c8de4ac186a48/src/Aspire.Hosting.OpenAI/OpenAIExtensions.cs)

Provides extension methods for adding OpenAI Model resources to the application model.

## Definition

```csharp
namespace Aspire.Hosting;

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

## Methods

- [AddModel(IResourceBuilder<OpenAIResource>, string, string)](/reference/api/csharp/aspire.hosting.openai/openaiextensions/methods.md#addmodel-iresourcebuilder-openairesource-string-string) : `IResourceBuilder<OpenAIModelResource>` `extension` `ats export` -- Adds an OpenAI Model child to the provided OpenAI resource.
- [AddOpenAI(IDistributedApplicationBuilder, string)](/reference/api/csharp/aspire.hosting.openai/openaiextensions/methods.md#addopenai-idistributedapplicationbuilder-string) : `IResourceBuilder<OpenAIResource>` `extension` `ats export` -- Adds an OpenAI parent resource that can host multiple models.
- [WithApiKey(IResourceBuilder<OpenAIResource>, IResourceBuilder<ParameterResource>)](/reference/api/csharp/aspire.hosting.openai/openaiextensions/methods.md#withapikey-iresourcebuilder-openairesource-iresourcebuilder-parameterresource) : `IResourceBuilder<OpenAIResource>` `extension` `ats export` -- Configures the API key for the OpenAI parent resource from a parameter.
- [WithEndpoint(IResourceBuilder<OpenAIResource>, string)](/reference/api/csharp/aspire.hosting.openai/openaiextensions/methods.md#withendpoint-iresourcebuilder-openairesource-string) : `IResourceBuilder<OpenAIResource>` `extension` `ats export` -- Sets a custom OpenAI-compatible service endpoint URI on the parent resource.
- [WithHealthCheck(IResourceBuilder<OpenAIModelResource>)](/reference/api/csharp/aspire.hosting.openai/openaiextensions/methods.md#withhealthcheck-iresourcebuilder-openaimodelresource) : `IResourceBuilder<OpenAIModelResource>` `extension` `ats export` -- Adds a health check to the OpenAI Model resource.