generated: '2026-08-29'
method: searched
source: >-
  https://api.nuget.org/v3/registration5-semver1/<id>/index.json (NuGet registration metadata,
  read unauthenticated per package), plus https://dotnet.microsoft.com/download and
  https://learn.microsoft.com/en-us/nuget/api/overview
note: >-
  Microsoft .NET distributes its first-party libraries through NuGet, which Microsoft also operates —
  the registry and the publisher are the same company here. Versions and publish dates below were read
  from the NuGet registration catalogEntry on 2026-08-29. There is no first-party .NET client library on
  npm, PyPI, RubyGems, Packagist or crates.io; the SDK itself ships as a platform installer from
  dotnet.microsoft.com/download, not as a registry package, so it is recorded as registry: installer
  with a null version because the download page floats to the latest servicing release.
packages:
  - language: csharp
    registry: nuget
    name: Microsoft.NETCore.App.Ref
    url: https://www.nuget.org/packages/Microsoft.NETCore.App.Ref
    install: dotnet add package Microsoft.NETCore.App.Ref
    official: true
    version: 10.0.11
    published: '2026-08-11'
    note: .NET runtime reference assemblies — the targeting pack for the base class library.
  - language: csharp
    registry: nuget
    name: Microsoft.AspNetCore.App.Ref
    url: https://www.nuget.org/packages/Microsoft.AspNetCore.App.Ref
    install: dotnet add package Microsoft.AspNetCore.App.Ref
    official: true
    version: 10.0.11
    published: '2026-08-11'
    note: ASP.NET Core shared-framework reference assemblies.
  - language: csharp
    registry: nuget
    name: Microsoft.AspNetCore.OpenApi
    url: https://www.nuget.org/packages/Microsoft.AspNetCore.OpenApi
    install: dotnet add package Microsoft.AspNetCore.OpenApi
    official: true
    version: 10.0.11
    published: '2026-08-11'
    note: First-party OpenAPI document generation for ASP.NET Core minimal APIs and controllers.
  - language: csharp
    registry: nuget
    name: Microsoft.EntityFrameworkCore
    url: https://www.nuget.org/packages/Microsoft.EntityFrameworkCore
    install: dotnet add package Microsoft.EntityFrameworkCore
    official: true
    version: 10.0.11
    published: '2026-08-11'
  - language: csharp
    registry: nuget
    name: Microsoft.Extensions.Hosting
    url: https://www.nuget.org/packages/Microsoft.Extensions.Hosting
    install: dotnet add package Microsoft.Extensions.Hosting
    official: true
    version: 10.0.11
    published: '2026-08-11'
  - language: csharp
    registry: nuget
    name: Microsoft.Extensions.DependencyInjection
    url: https://www.nuget.org/packages/Microsoft.Extensions.DependencyInjection
    install: dotnet add package Microsoft.Extensions.DependencyInjection
    official: true
    version: 10.0.11
    published: '2026-08-11'
  - language: csharp
    registry: nuget
    name: Microsoft.Extensions.Http
    url: https://www.nuget.org/packages/Microsoft.Extensions.Http
    install: dotnet add package Microsoft.Extensions.Http
    official: true
    version: 10.0.11
    published: '2026-08-11'
  - language: csharp
    registry: nuget
    name: System.Text.Json
    url: https://www.nuget.org/packages/System.Text.Json
    install: dotnet add package System.Text.Json
    official: true
    version: 10.0.11
    published: '2026-08-11'
  - language: csharp
    registry: nuget
    name: Microsoft.Extensions.AI
    url: https://www.nuget.org/packages/Microsoft.Extensions.AI
    install: dotnet add package Microsoft.Extensions.AI
    official: true
    version: 10.9.0
    published: '2026-08-11'
    note: First-party AI abstractions used by .NET agent and MCP scenarios.
  - language: csharp
    registry: nuget
    name: Microsoft.Extensions.AI.OpenAI
    url: https://www.nuget.org/packages/Microsoft.Extensions.AI.OpenAI
    install: dotnet add package Microsoft.Extensions.AI.OpenAI
    official: true
    version: 10.9.0
    published: '2026-08-11'
  - language: csharp
    registry: nuget
    name: Microsoft.Maui.Controls
    url: https://www.nuget.org/packages/Microsoft.Maui.Controls
    install: dotnet add package Microsoft.Maui.Controls
    official: true
    version: 10.0.100
    published: '2026-08-20'
  - language: csharp
    registry: nuget
    name: Aspire.Hosting
    url: https://www.nuget.org/packages/Aspire.Hosting
    install: dotnet add package Aspire.Hosting
    official: true
    version: 13.5.3
    published: '2026-08-25'
    note: .NET Aspire app-host library — the distributed-application composition surface.
  - language: csharp
    registry: nuget
    name: Aspire.Hosting.AppHost
    url: https://www.nuget.org/packages/Aspire.Hosting.AppHost
    install: dotnet add package Aspire.Hosting.AppHost
    official: true
    version: 13.5.3
    published: '2026-08-25'
  - language: csharp
    registry: nuget
    name: NuGet.Protocol
    url: https://www.nuget.org/packages/NuGet.Protocol
    install: dotnet add package NuGet.Protocol
    official: true
    version: 7.9.0
    published: '2026-08-11'
    note: The first-party client library for the NuGet Server API (V3) documented in openapi/.
  - language: csharp
    registry: nuget
    name: NuGet.Packaging
    url: https://www.nuget.org/packages/NuGet.Packaging
    install: dotnet add package NuGet.Packaging
    official: true
    version: 7.9.0
    published: '2026-08-11'
  - language: csharp
    registry: nuget
    name: NuGet.Commands
    url: https://www.nuget.org/packages/NuGet.Commands
    install: dotnet add package NuGet.Commands
    official: true
    version: 7.9.0
    published: '2026-08-11'
  - language: csharp
    registry: nuget
    name: NuGet.Mcp.Server
    url: https://www.nuget.org/packages/NuGet.Mcp.Server
    install: dnx NuGet.Mcp.Server --yes
    official: true
    version: 1.4.16
    published: '2026-06-30'
    note: >-
      The first-party NuGet MCP server, distributed as a NuGet tool package and launched with the
      .NET 10 `dnx` command. Runtime-specific builds also published
      (NuGet.Mcp.Server.win-x64 / .linux-x64 / .win-arm64 / .osx-arm64 / .linux-arm64, all 1.4.16).
  - language: csharp
    registry: nuget
    name: ModelContextProtocol
    url: https://www.nuget.org/packages/ModelContextProtocol
    install: dotnet add package ModelContextProtocol
    official: true
    version: 2.2.0
    published: '2026-08-13'
    note: >-
      The C# MCP SDK. Published on nuget.org and developed at github.com/modelcontextprotocol/csharp-sdk
      in collaboration with Microsoft; it is the library the `dotnet new mcpserver` template targets.
  - language: csharp
    registry: nuget
    name: ModelContextProtocol.AspNetCore
    url: https://www.nuget.org/packages/ModelContextProtocol.AspNetCore
    install: dotnet add package ModelContextProtocol.AspNetCore
    official: true
    version: 2.2.0
    published: '2026-08-13'
  - language: csharp
    registry: nuget
    name: Microsoft.Playwright
    url: https://www.nuget.org/packages/Microsoft.Playwright
    install: dotnet add package Microsoft.Playwright
    official: true
    version: 1.62.0
    published: '2026-08-11'
  - language: multiple
    registry: installer
    name: .NET SDK
    url: https://dotnet.microsoft.com/download
    install: See platform installers, apt/yum feeds, Homebrew, and the dotnet-install scripts.
    official: true
    version: null
    published: null
    note: >-
      Checked, nothing to record as a pinned version — the .NET SDK ships as a platform installer and
      the download page floats to the latest servicing release rather than exposing a registry metadata
      endpoint. The supported-version table on
      https://dotnet.microsoft.com/en-us/platform/support/policy/dotnet-core named .NET 10.0.11 (patch
      released 2026-08-11) as the current LTS patch on the date of this probe; see lifecycle/.
registries_checked:
  - registry: nuget
    result: 21 first-party packages recorded
  - registry: npm
    result: no first-party Microsoft .NET client library
  - registry: pypi
    result: no first-party Microsoft .NET client library
  - registry: rubygems
    result: no first-party Microsoft .NET client library
  - registry: packagist
    result: no first-party Microsoft .NET client library
  - registry: crates.io
    result: no first-party Microsoft .NET client library
  - registry: maven-central
    result: no first-party Microsoft .NET client library
  - registry: pkg.go.dev
    result: no first-party Microsoft .NET client library