
OllamaSharp
The easiest way to use the Ollama API in .NET
Stars: 881

OllamaSharp is a .NET binding for the Ollama API, providing an intuitive API client to interact with Ollama. It offers support for all Ollama API endpoints, real-time streaming, progress reporting, and an API console for remote management. Users can easily set up the client, list models, pull models with progress feedback, stream completions, and build interactive chats. The project includes a demo console for exploring and managing the Ollama host.
README:
OllamaSharp provides .NET bindings for the Ollama API, simplifying interactions with Ollama both locally and remotely.
- Ease of use: Interact with Ollama in just a few lines of code.
- Reliability: Powering Microsoft Semantic Kernel, .NET Aspire and Microsoft.Extensions.AI
- API coverage: Covers every single Ollama API endpoint, including chats, embeddings, listing models, pulling and creating new models, and more.
- Real-time streaming: Stream responses directly to your application.
- Progress reporting: Real-time progress feedback on tasks like model pulling.
- Tools engine: Sophisticated tool support with source generators.
- Multi modality: Support for vision models.
OllamaSharp wraps each Ollama API endpoint in awaitable methods that fully support response streaming.
The following list shows a few simple code examples.
ℹ Try our full featured demo application that's included in this repository
// set up the client
var uri = new Uri("http://localhost:11434");
var ollama = new OllamaApiClient(uri);
// select a model which should be used for further operations
ollama.SelectedModel = "llama3.1:8b";
var models = await ollama.ListLocalModelsAsync();
await foreach (var status in ollama.PullModelAsync("llama3.1:405b"))
Console.WriteLine($"{status.Percent}% {status.Status}");
await foreach (var stream in ollama.GenerateAsync("How are you today?"))
Console.Write(stream.Response);
// messages including their roles and tool calls will automatically be tracked within the chat object
// and are accessible via the Messages property
var chat = new Chat(ollama);
while (true)
{
var message = Console.ReadLine();
await foreach (var answerToken in chat.SendAsync(message))
Console.Write(answerToken);
}
Microsoft built an abstraction library to streamline the usage of different AI providers. This is a really interesting concept if you plan to build apps that might use different providers, like ChatGPT, Claude and local models with Ollama.
I encourage you to read their accouncement Introducing Microsoft.Extensions.AI Preview – Unified AI Building Blocks for .NET.
OllamaSharp is the first full implementation of their IChatClient
and IEmbeddingGenerator
that makes it possible to use Ollama just like every other chat provider.
To do this, simply use the OllamaApiClient
as IChatClient
instead of IOllamaApiClient
.
// install package Microsoft.Extensions.AI.Abstractions
private static IChatClient CreateChatClient(Arguments arguments)
{
if (arguments.Provider.Equals("ollama", StringComparison.OrdinalIgnoreCase))
return new OllamaApiClient(arguments.Uri, arguments.Model);
else
return new OpenAIChatClient(new OpenAI.OpenAIClient(arguments.ApiKey), arguments.Model); // ChatGPT or compatible
}
[!NOTE]
IOllamaApiClient
provides many Ollama specific methods thatIChatClient
andIEmbeddingGenerator
miss. Because these are abstractions,IChatClient
andIEmbeddingGenerator
will never implement the full Ollama API specification. However,OllamaApiClient
implements three interfaces: the nativeIOllamaApiClient
and MicrosoftIChatClient
andIEmbeddingGenerator<string, Embedding<float>>
which allows you to cast it to any of these two interfaces as you need them at any time.
The icon and name were reused from the amazing Ollama project.
I would like to thank all the contributors who take the time to improve OllamaSharp. First and foremost mili-tan, who always keeps OllamaSharp in sync with the Ollama API. ❤
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