How to connect to MCP server?

[MarvinKlein1508]

According to the docs OllamaSharp supports connecting to MCP servers.
https://github.com/awaescher/OllamaSharp/blob/main/docs/tool-support.md

I have installed the OllamaSharp.ModelContextProtocol nuget package and I also see Tools.GetFromMcpServers() in intellisense. But how can I connect it to an http MCP server now?

The docs state It supports reading MCP servers from a configuration file or via code. but they doesn't show how to do this properly.

I have created a basic MCP server using the dotnet new install Microsoft.McpServer.ProjectTemplates templates.

var builder = WebApplication.CreateBuilder(args);

// Add the MCP services: the transport to use (http) and the tools to register.
builder.Services
    .AddMcpServer()
    .WithHttpTransport()
    .WithTools<RandomNumberTools>();

var app = builder.Build();
app.MapMcp();
app.UseHttpsRedirection();

app.Run();

/// <summary>
/// Sample MCP tools for demonstration purposes.
/// These tools can be invoked by MCP clients to perform various operations.
/// </summary>
internal class RandomNumberTools
{
    [McpServerTool]
    [Description("Generates a random number between the specified minimum and maximum values.")]
    public int GetRandomNumber(
        [Description("Minimum value (inclusive)")] int min = 0,
        [Description("Maximum value (exclusive)")] int max = 100)
    {
        return Random.Shared.Next(min, max);
    }
}

And this is my current client:

using OllamaSharp;
using OllamaSharp.ModelContextProtocol;
using OllamaSharp.ModelContextProtocol.Server;

var uri = new Uri("http://localhost:11434");
var ollama = new OllamaApiClient(uri);
var models = await ollama.ListLocalModelsAsync();
ollama.SelectedModel = "llama3.2:latest";

var tools = await Tools.GetFromMcpServers(new McpServerConfiguration[]
{
    new McpServerConfiguration()
    {
        Name = "Localhost MCP Server",
        // How to get MCP from https://localhost:5269
    }
});

foreach (var item in tools)
{
    Console.WriteLine(item.Function);
}

var chat = new Chat(ollama);

while (true)
{
    var message = Console.ReadLine();
    await foreach (var answerToken in chat.SendAsync(message))
    {
        Console.Write(answerToken);
    }
}

Can someone help me out here?

Thanks! :)

[awaescher]

It reads MCP configs like shown here.
The demo console shows how to read this file here.

I understand that our docs seem to be a bit vague here. But please also note that MCP is a pretty new and moving protocol. I highly recommend using the official C# sdk which can be used with OllamaSharp, too.

[MarvinKlein1508]

Hi @awaescher thanks for your reply! The configuration demo file will help me. I'm using the official C# SDK here. But I'm using the new template with http support. I got it to work by configuring the MCP server like this:

var tools = await Tools.GetFromMcpServers(new McpServerConfiguration[]
{
    new McpServerConfiguration()
    {
        Name = "Localhost MCP Server",
        TransportType = McpServerTransportType.Sse,
        Command = "https://localhost:5269/sse"
    }
});

It's important that you define the McpServerTransportType to Sse and that the command points to the /sse endpoint

Thank you for this great tool! :)

[awaescher]

Thanks Marvin, nice to see this worked for you. I also updated the docs to recommend the official SDK and linked some code samples.