Microsoft.AspNetCore.OpenApi

v11.0.0-preview.4.26230.115

Provides APIs for annotating route handler endpoints in ASP.NET Core with OpenAPI annotations. This package was built from the source code at https://github.com/dotnet/dotnet/tree/4370ea16341331f045fa9b89cc46e03aed27195c

aspnet dotnetframework Microsoft

aspnetcore openapi

NuGet Stats Changelog

Total Downloads

204.2M

204,188,599

Published

May 12, 2026

Latest stable version

Install

.NET CLI

dotnet add package Microsoft.AspNetCore.OpenApi --version 11.0.0-preview.4.26230.115

Package Manager Console

Install-Package Microsoft.AspNetCore.OpenApi -Version 11.0.0-preview.4.26230.115

PackageReference

<PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="11.0.0-preview.4.26230.115" />

Frameworks

net11.0

Dependencies

Microsoft.AspNetCore.WebUtilities

net11.0

[11.0.0-preview.4.26230.115, )

Microsoft.Extensions.Hosting

net11.0

[11.0.0-preview.4.26230.115, )

Microsoft.OpenApi

net11.0

[3.3.1, )

Adoption guide

Teams staying close to first-party ASP.NET Core primitives and minimal external framework layering.

ASP.NET Core guide

Why it appears in the guide: First-party OpenAPI generation support aligned with modern ASP.NET Core hosting patterns. Trade-off: Feature customization depth may require additional conventions or complementary packages.

This version is marked prerelease. Validate its API and upgrade path before production use.

Compatibility metadata lists 1 target framework; confirm the exact target used by your application.

How to read this guidance

Sources: published NuGet v3 registry metadata and explicit NuBrowse editorial guides. Refresh: package metadata is refreshed from NuGet when the page loads. Limit: this is not a security, legal or compatibility guarantee; validate the selected version in your project.

Useful next steps

Move from package metadata to a concrete selection or review workflow.

ASP.NET Core package guide Audit NuGet dependencies in a .NET project Review NuGet licenses before shipping