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Microsoft.Extensions.AI Integration

Cross-SDK comparison

See the centralized MEAI documentation for feature matrices and comparisons across all tryAGI SDKs.

The Anthropic SDK implements IChatClient from Microsoft.Extensions.AI.

Supported Interfaces

Interface Support Level
IChatClient Full (text, streaming, tool calling, images, PDFs, thinking)

IChatClient

Installation

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dotnet add package tryAGI.Anthropic

Basic Usage

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using Anthropic;
using Microsoft.Extensions.AI;

using var client = new AnthropicClient(apiKey);
IChatClient chatClient = client;

var response = await chatClient.GetResponseAsync(
    "What is the capital of France?",
    new ChatOptions
    {
        ModelId = "claude-sonnet-4-20250514",
    });

Console.WriteLine(response.Text);

Streaming

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IChatClient chatClient = client;

await foreach (var update in chatClient.GetStreamingResponseAsync(
    "Write a short poem about coding.",
    new ChatOptions
    {
        ModelId = "claude-sonnet-4-20250514",
    }))
{
    Console.Write(update.Text);
}

Tool Calling

Define tools using CSharpToJsonSchema and pass them via ChatOptions:

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using CSharpToJsonSchema;

[GenerateJsonSchema]
public interface IWeatherTools
{
    [Description("Gets the current weather for a location.")]
    string GetWeather(
        [Description("The city name")] string city);
}

IChatClient chatClient = client;
var service = new WeatherToolsService();

var response = await chatClient.GetResponseAsync(
    "What's the weather in Paris?",
    new ChatOptions
    {
        ModelId = "claude-sonnet-4-20250514",
        Tools = service.AsTools().AsAITools(),
    });

Image Input

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IChatClient chatClient = client;

var response = await chatClient.GetResponseAsync(
    [
        new ChatMessage(ChatRole.User,
        [
            new ImageContent(imageBytes, "image/png"),
            new TextContent("Describe this image."),
        ]),
    ],
    new ChatOptions
    {
        ModelId = "claude-sonnet-4-20250514",
    });

Extended Thinking

Enable extended thinking through AdditionalProperties:

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IChatClient chatClient = client;

var response = await chatClient.GetResponseAsync(
    "Solve this step by step: What is 147 * 283?",
    new ChatOptions
    {
        ModelId = "claude-sonnet-4-20250514",
        AdditionalProperties = new AdditionalPropertiesDictionary
        {
            ["thinking"] = true,
        },
    });

Token Usage

Token usage information is available on the response:

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var response = await chatClient.GetResponseAsync("Hello!");

Console.WriteLine($"Input tokens: {response.Usage?.InputTokenCount}");
Console.WriteLine($"Output tokens: {response.Usage?.OutputTokenCount}");