SignalR.Azure.Serverless 1.0.1

.NET Standard 2.0
Install-Package SignalR.Azure.Serverless -Version 1.0.1
dotnet add package SignalR.Azure.Serverless --version 1.0.1
<PackageReference Include="SignalR.Azure.Serverless" Version="1.0.1" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add SignalR.Azure.Serverless --version 1.0.1
The NuGet Team does not provide support for this client. Please contact its maintainers for support.
#r "nuget: SignalR.Azure.Serverless, 1.0.1"
#r directive can be used in F# Interactive, C# scripting and .NET Interactive. Copy this into the interactive tool or source code of the script to reference the package.
// Install SignalR.Azure.Serverless as a Cake Addin
#addin nuget:?package=SignalR.Azure.Serverless&version=1.0.1

// Install SignalR.Azure.Serverless as a Cake Tool
#tool nuget:?package=SignalR.Azure.Serverless&version=1.0.1
The NuGet Team does not provide support for this client. Please contact its maintainers for support.


A helper library for publishing and subscribing to SignalR service running on Azure in serverless mode.

With SignalR serverless, you can publish and subscribe to messages without the need to create an ASP.NET Core API App. You may use this library in ASP.NET Core, Xamarin, WinForm, WPF, or Console applications. Unlike SNS or Azure Event Grid, any app can subscribe to the feed (and publish) so long as the app knows the AccessKey.

SignalR is not a queue, it's an opportunistic broadcaster. SignalR will broadcast an event to whichever clients are connected to the hub at the time of the event. Any clients which are not connected will miss the event. Sometimes this behaviour is desired.

There are two samples: A WFP App RestaurantTableTracker and a PubSubConsoleApp. See the WPF App for an example on how to handle connection drops.


public class PubSubSample
    SignalRHubHelper signalRHubHelper;
    HubConnection signalRHubConnection;

    public async Task ListenToEvents(string connString)
        signalRHubHelper = new SignalRHubHelper(connString);

        var hubUrl = signalRHubHelper.ClientUrl("default_hub");

        // define a connection to receive published events
        signalRHubConnection = new HubConnectionBuilder().WithUrl(hubUrl, option =>
            option.AccessTokenProvider = () =>
                var token = signalRHubHelper.GenerateAccessToken(hubUrl, "user-x");

                return Task.FromResult(token);

        // define an event handler for received messages
        signalRHubConnection.On<string, string>("StatusChanged", (deviceId, status) =>
            Console.WriteLine($"Device {deviceId} changed status to {status}");

        // start listening to published events
        await signalRHubConnection.StartAsync();

        Console.WriteLine("Listening for events...");

    public async Task PublishTestMessage()
        using (var httpClient = new HttpClient()) // it is recommened that you re-use the HttpClient
            var signalRApiClient = new SignalRApiClient(httpClient, signalRHubHelper);

            var msg = new SignalRMessage()
                target = "StatusChanged",
                arguments = new object[] { "device_1", "offline" }

            await signalRApiClient.BroadcastToAllClients(senderUserId: "user-x", hubName: "default_hub", msg);

    public async Task StopListeningToEvents()
        await signalRHubConnection.DisposeAsync();

The code is based on samples published by Jeeva Subburaj and is written against v1 of SignalR API.

Product Versions
.NET net5.0 net5.0-windows net6.0 net6.0-android net6.0-ios net6.0-maccatalyst net6.0-macos net6.0-tvos net6.0-windows
.NET Core netcoreapp2.0 netcoreapp2.1 netcoreapp2.2 netcoreapp3.0 netcoreapp3.1
.NET Standard netstandard2.0 netstandard2.1
.NET Framework net461 net462 net463 net47 net471 net472 net48
MonoAndroid monoandroid
MonoMac monomac
MonoTouch monotouch
Tizen tizen40 tizen60
Xamarin.iOS xamarinios
Xamarin.Mac xamarinmac
Xamarin.TVOS xamarintvos
Xamarin.WatchOS xamarinwatchos
Compatible target framework(s)
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NuGet packages

This package is not used by any NuGet packages.

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Version Downloads Last updated
1.0.1 960 7/1/2019

v1.0.1 - Initial Release