Anthropic 12.9.0
Claude SDK for C#
Important
As of version 10+, the Anthropic package is now the official Claude SDK for C#. Package versions 3.X and below were previously used for the tryAGI community-built SDK, which has moved to tryAGI.Anthropic. If you need to continue using the former client in your project, update your package reference to tryAGI.Anthropic.
The Claude SDK for C# provides access to the Claude API from C# applications.
Documentation
Full documentation is available at platform.claude.com/docs/en/api/sdks/csharp.
Installation
dotnet add package Anthropic
Getting started
using System;
using Anthropic;
using Anthropic.Models.Messages;
AnthropicClient client = new();
MessageCreateParams parameters = new()
{
MaxTokens = 1024,
Messages =
[
new()
{
Role = Role.User,
Content = "Hello, Claude",
},
],
Model = "claude-opus-4-6",
};
var message = await client.Messages.Create(parameters);
Console.WriteLine(message);
Requirements
.NET Standard 2.0+
Contributing
See CONTRIBUTING.md.
License
This project is licensed under the MIT License. See the LICENSE file for details.
Showing the top 20 packages that depend on Anthropic.
| Packages | Downloads |
|---|---|
|
Anthropic.Foundry
Package Description
|
3 |
|
Anthropic.Foundry
Package Description
|
2 |
.NET 8.0
- Microsoft.Extensions.AI.Abstractions (>= 10.2.0)
- System.Net.ServerSentEvents (>= 10.0.1)
- System.Text.Json (>= 10.0.2)
.NET 9.0
- Microsoft.Extensions.AI.Abstractions (>= 10.2.0)
- System.Net.ServerSentEvents (>= 10.0.1)
- System.Text.Json (>= 10.0.2)
.NET Standard 2.0
- Microsoft.Extensions.AI.Abstractions (>= 10.2.0)
- System.Collections.Immutable (>= 8.0.0)
- System.Net.ServerSentEvents (>= 10.0.1)
- System.Text.Json (>= 10.0.2)
| Version | Downloads | Last updated |
|---|---|---|
| 12.11.0 | 2 | 04/04/2026 |
| 12.10.0 | 2 | 04/04/2026 |
| 12.9.0 | 2 | 03/26/2026 |
| 12.8.0 | 3 | 03/04/2026 |
| 12.7.0 | 2 | 03/06/2026 |
| 12.6.0 | 2 | 03/06/2026 |
| 12.5.0 | 2 | 03/06/2026 |
| 12.4.0 | 2 | 03/06/2026 |
| 12.3.0 | 2 | 03/06/2026 |
| 12.2.0 | 2 | 03/06/2026 |
| 12.1.0 | 2 | 03/06/2026 |
| 12.0.1 | 2 | 03/06/2026 |
| 12.0.0 | 2 | 03/06/2026 |
| 11.0.0 | 2 | 03/06/2026 |
| 10.4.0 | 2 | 03/06/2026 |
| 10.2.1 | 2 | 03/06/2026 |
| 10.1.2 | 2 | 03/06/2026 |
| 10.0.1 | 2 | 03/06/2026 |
| 3.7.1-dev.6 | 2 | 03/06/2026 |
| 3.7.1-dev.5 | 2 | 03/06/2026 |
| 3.7.1-dev.4 | 2 | 03/06/2026 |
| 3.7.1-dev.3 | 2 | 03/06/2026 |
| 3.7.0 | 2 | 03/06/2026 |
| 3.6.1-dev.4 | 2 | 03/06/2026 |
| 3.6.1-dev.2 | 2 | 03/06/2026 |
| 3.6.1-dev.1 | 2 | 03/06/2026 |
| 3.6.0 | 2 | 03/06/2026 |
| 3.5.1-dev.3 | 2 | 03/06/2026 |
| 3.5.1-dev.2 | 2 | 03/06/2026 |
| 3.5.1-dev.1 | 2 | 03/06/2026 |
| 3.5.0 | 2 | 03/06/2026 |
| 3.4.2-dev.11 | 2 | 03/06/2026 |
| 3.4.2-dev.4 | 2 | 03/06/2026 |
| 3.4.2-dev.3 | 2 | 03/06/2026 |
| 3.4.2-dev.2 | 2 | 03/06/2026 |
| 3.4.2-dev.1 | 2 | 03/06/2026 |
| 3.4.1 | 2 | 03/06/2026 |
| 3.4.1-dev.11 | 2 | 03/06/2026 |
| 3.4.1-dev.10 | 2 | 03/06/2026 |
| 3.4.1-dev.8 | 2 | 03/06/2026 |
| 3.4.1-dev.7 | 2 | 03/06/2026 |
| 3.4.1-dev.6 | 2 | 03/06/2026 |
| 3.4.1-dev.5 | 2 | 03/06/2026 |
| 3.4.1-dev.4 | 2 | 03/06/2026 |
| 3.4.0 | 2 | 03/06/2026 |
| 3.3.1-dev.1 | 2 | 03/06/2026 |
| 3.3.0 | 2 | 03/06/2026 |
| 3.2.1-dev.10 | 2 | 03/06/2026 |
| 3.2.1-dev.7 | 2 | 03/06/2026 |
| 3.2.0 | 2 | 03/06/2026 |
| 3.1.1-dev.8 | 2 | 03/06/2026 |
| 3.1.1-dev.6 | 2 | 03/06/2026 |
| 3.1.0 | 2 | 03/06/2026 |
| 3.0.0 | 2 | 03/06/2026 |
| 2.1.2-dev.4 | 2 | 03/06/2026 |
| 2.1.2-dev.3 | 2 | 03/06/2026 |
| 2.0.1-dev.11 | 2 | 03/06/2026 |
| 2.0.1-dev.10 | 2 | 03/06/2026 |
| 2.0.1-dev.9 | 2 | 03/06/2026 |
| 2.0.1-dev.8 | 2 | 03/06/2026 |
| 2.0.1-dev.3 | 2 | 03/06/2026 |
| 2.0.1-dev.2 | 2 | 03/06/2026 |
| 2.0.1-dev.1 | 2 | 03/06/2026 |
| 2.0.0 | 2 | 03/06/2026 |
| 1.4.5-dev.5 | 2 | 03/06/2026 |
| 1.4.5-dev.1 | 2 | 03/06/2026 |
| 1.4.4 | 2 | 03/06/2026 |
| 1.4.3-dev.1 | 2 | 03/06/2026 |
| 1.4.2 | 2 | 03/06/2026 |
| 1.4.1 | 2 | 03/06/2026 |
| 1.3.0 | 2 | 03/06/2026 |
| 1.2.1-dev.18 | 2 | 03/06/2026 |
| 1.2.1-dev.14 | 2 | 03/06/2026 |
| 1.2.1-dev.13 | 2 | 03/06/2026 |
| 1.2.1-dev.10 | 2 | 03/06/2026 |
| 1.2.1-dev.4 | 2 | 03/06/2026 |
| 1.2.0 | 2 | 03/06/2026 |
| 1.1.1-dev.13 | 2 | 03/06/2026 |
| 1.1.1-dev.12 | 2 | 03/06/2026 |
| 1.1.1-dev.10 | 2 | 03/06/2026 |
| 1.1.1-dev.9 | 2 | 03/06/2026 |
| 1.1.1-dev.8 | 2 | 03/06/2026 |
| 1.1.1-dev.7 | 2 | 03/06/2026 |
| 1.1.1-dev.2 | 2 | 03/06/2026 |
| 1.1.1-dev.1 | 2 | 03/06/2026 |
| 1.1.0 | 2 | 03/06/2026 |
| 1.0.2-dev.1 | 2 | 03/06/2026 |
| 1.0.1 | 2 | 03/06/2026 |
| 1.0.0 | 2 | 03/06/2026 |
| 0.4.1-dev.6 | 2 | 03/06/2026 |
| 0.4.1-dev.2 | 2 | 03/06/2026 |
| 0.4.0 | 2 | 03/06/2026 |
| 0.3.1 | 2 | 03/06/2026 |
| 0.3.0 | 2 | 03/06/2026 |
| 0.2.0 | 2 | 03/06/2026 |
| 0.2.0-alpha03 | 2 | 03/06/2026 |
| 0.1.0 | 2 | 03/06/2026 |
| 0.0.0-dev.35 | 2 | 03/06/2026 |