AiSdk.UiStreamProtocol.AspNetCore 1.0.4

dotnet add package AiSdk.UiStreamProtocol.AspNetCore --version 1.0.4
                    
NuGet\Install-Package AiSdk.UiStreamProtocol.AspNetCore -Version 1.0.4
                    
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="AiSdk.UiStreamProtocol.AspNetCore" Version="1.0.4" />
                    
For projects that support PackageReference, copy this XML node into the project file to reference the package.
<PackageVersion Include="AiSdk.UiStreamProtocol.AspNetCore" Version="1.0.4" />
                    
Directory.Packages.props
<PackageReference Include="AiSdk.UiStreamProtocol.AspNetCore" />
                    
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 AiSdk.UiStreamProtocol.AspNetCore --version 1.0.4
                    
#r "nuget: AiSdk.UiStreamProtocol.AspNetCore, 1.0.4"
                    
#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 AiSdk.UiStreamProtocol.AspNetCore@1.0.4
                    
#: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=AiSdk.UiStreamProtocol.AspNetCore&version=1.0.4
                    
Install as a Cake Addin
#tool nuget:?package=AiSdk.UiStreamProtocol.AspNetCore&version=1.0.4
                    
Install as a Cake Tool

AiSdk.UiStreamProtocol.AspNetCore

ASP.NET Core integration for the Vercel AI SDK UI Stream Protocol. Lets you stream typed AI responses from a .NET backend directly to a frontend using useChat.

Installation

dotnet add package AiSdk.UiStreamProtocol.AspNetCore

Usage

Return a UiMessageStreamResult from any minimal API endpoint. It sets all required headers (Content-Type: text/event-stream, x-vercel-ai-ui-message-stream: v1, and buffering/compression headers) and streams the body.

using AiSdk.UiStreamProtocol;
using AiSdk.UiStreamProtocol.AspNetCore;
using AiSdk.UiStreamProtocol.Models;

app.MapPost("/api/chat", () =>
{
    return new UiMessageStreamResult(async stream =>
    {
        var writer = new UiSseWriter();
        var textId = Guid.NewGuid().ToString();

        await writer.WriteAsync(stream, new TextStart(textId));

        // stream tokens from your LLM here
        await writer.WriteAsync(stream, new TextDelta(textId, "Hello world"));

        await writer.WriteAsync(stream, new TextEnd(textId));
        await writer.WriteAsync(stream, new Finish());
        await writer.WriteAsync(stream, new Done());
    });
});

Then on the frontend:

import { useChat } from '@ai-sdk/react';
import { UIMessageStreamTransport } from 'ai';

const { messages } = useChat({
  transport: new UIMessageStreamTransport({ api: '/api/chat' }),
});

Full documentation and source

Product Compatible and additional computed target framework versions.
.NET net10.0 is compatible.  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. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

NuGet packages

This package is not used by any NuGet packages.

GitHub repositories

This package is not used by any popular GitHub repositories.

Version Downloads Last Updated
1.0.4 163 3/1/2026
1.0.3 130 2/28/2026
1.0.2 134 2/28/2026
1.0.1 129 2/28/2026
1.0.0 124 2/28/2026