Anthropic 13.3.0

Prefix Reserved
.NET 8.0 This package targets .NET 8.0. The package is compatible with this framework or higher. .NET Standard 2.0 This package targets .NET Standard 2.0. The package is compatible with this framework or higher. 
dotnet add package Anthropic --version 13.3.0
                    


                    

                
NuGet\Install-Package Anthropic -Version 13.3.0
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package. 
<PackageReference Include="Anthropic" Version="13.3.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="Anthropic" Version="13.3.0" />
                    


                            Directory.Packages.props
                        

                    

                
<PackageReference Include="Anthropic" />
                    


                            Project file
For projects that support Central Package Management (CPM), copy this XML node into the solution Directory.Packages.props file to version the package. 
paket add Anthropic --version 13.3.0
                    


                    

                
#r "nuget: Anthropic, 13.3.0"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package. 
#:package Anthropic@13.3.0
#:package directive can be used in C# file-based apps starting in .NET 10 preview 4. Copy this into a .cs file before any lines of code to reference the package. 
#addin nuget:?package=Anthropic&version=13.3.0
                    


                            Install as a Cake Addin
                        

                    

                
#tool nuget:?package=Anthropic&version=13.3.0
                    


                            Install as a Cake Tool

Claude SDK for C#

NuGet Version

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 UserMessageParam("Hello, Claude")
    ],
    Model = Model.ClaudeOpus5_5,
};

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 Apache License, Version 2.0. See the LICENSE file for details. Versions released before the change from the MIT License, and third-party contributions merged before it, remain under the MIT License. See LICENSE-MIT.

Product Compatible and additional computed target framework versions.
.NET net5.0 was computed.  net5.0-windows was computed.  net6.0 was computed.  net6.0-android was computed.  net6.0-ios was computed.  net6.0-maccatalyst was computed.  net6.0-macos was computed.  net6.0-tvos was computed.  net6.0-windows was computed.  net7.0 was computed.  net7.0-android was computed.  net7.0-ios was computed.  net7.0-maccatalyst was computed.  net7.0-macos was computed.  net7.0-tvos was computed.  net7.0-windows was computed.  net8.0 is compatible.  net8.0-android was computed.  net8.0-browser was computed.  net8.0-ios was computed.  net8.0-maccatalyst was computed.  net8.0-macos was computed.  net8.0-tvos was computed.  net8.0-windows was computed.  net9.0 is compatible.  net9.0-android was computed.  net9.0-browser was computed.  net9.0-ios was computed.  net9.0-maccatalyst was computed.  net9.0-macos was computed.  net9.0-tvos was computed.  net9.0-windows was computed.  net10.0 was computed.  net10.0-android was computed.  net10.0-browser was computed.  net10.0-ios was computed.  net10.0-maccatalyst was computed.  net10.0-macos was computed.  net10.0-tvos was computed.  net10.0-windows was computed. 
.NET Core netcoreapp2.0 was computed.  netcoreapp2.1 was computed.  netcoreapp2.2 was computed.  netcoreapp3.0 was computed.  netcoreapp3.1 was computed. 
.NET Standard netstandard2.0 is compatible.  netstandard2.1 was computed. 
.NET Framework net461 was computed.  net462 was computed.  net463 was computed.  net47 was computed.  net471 was computed.  net472 was computed.  net48 was computed.  net481 was computed. 
MonoAndroid monoandroid was computed. 
MonoMac monomac was computed. 
MonoTouch monotouch was computed. 
Tizen tizen40 was computed.  tizen60 was computed. 
Xamarin.iOS xamarinios was computed. 
Xamarin.Mac xamarinmac was computed. 
Xamarin.TVOS xamarintvos was computed. 
Xamarin.WatchOS xamarinwatchos was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

NuGet packages (95)

Showing the top 5 NuGet packages that depend on Anthropic:

Package Downloads
Anthropic.Foundry

Package Description
LangChain.Providers.Anthropic

Anthropic API LLM and Chat model provider.
Microsoft.Agents.AI.Anthropic

Provides Microsoft Agent Framework support for Anthropic Agents.
Anthropic.Bedrock

Package Description
Anthropic.Vertex

Package Description

GitHub repositories (9)

Showing the top 9 popular GitHub repositories that depend on Anthropic:

Repository Stars
Sylinko/Everywhere
On-screen aware AI assistant for your desktop. Uses current app context, multiple LLMs, and MCP tools to help you act across apps.
modelcontextprotocol/csharp-sdk
The official C# SDK for Model Context Protocol servers and clients. Maintained in collaboration with Microsoft.
getcellm/cellm
Use LLMs in Excel formulas
clawdotnet/openclaw.net
Self-hosted Enterprise and Personal AI + agent runtime in .NET (NativeAOT-friendly)
DotHarness/dotcraft
The agent harness for .NET: embeddable, extensible, remotely controllable and ready to use.
CodeAlta/CodeAlta
Agentic Development Environment
netclaw-dev/netclaw
Simple, secure, reliable agents. Self-hosted. Open source. Built with .NET.
Cysharp/CompilerBrain
CLI Coding Agent not for Vibe-coding, for C# Expert.
clawdotnet/SharpClawCode
C# coding-agent harness (.NET 10, Microsoft Agent Framework) — sessions, tools, permissions, providers, MCP, plugins
Version Downloads Last Updated
13.3.0 18,517 10/23/2026
13.2.1 4,631 10/23/2026
13.2.0 1,839 10/23/2026
13.1.0 18,509 10/21/2026
13.0.0 10,213 10/21/2026
12.60.0 18,867 10/20/2026
12.59.0 5,608 10/20/2026
12.58.0 124,526 10/15/2026
12.57.0 66,492 10/14/2026
12.56.0 12,779 10/14/2026
12.55.0 178,174 10/9/2026
12.54.1 49,800 10/8/2026
12.54.0 13,366 10/7/2026
12.53.0 355,766 9/30/2026
12.52.0 12,095 9/30/2026
12.51.0 93,394 9/28/2026
12.50.0 204,853 9/22/2026
12.49.0 91,812 9/18/2026
12.48.0 83,425 9/15/2026
12.47.0 111,552 9/10/2026
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