Flare.OpenFeature.Provider 10.1.1

.NET Standard 2.0

dotnet add package Flare.OpenFeature.Provider --version 10.1.1

NuGet\Install-Package Flare.OpenFeature.Provider -Version 10.1.1

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="Flare.OpenFeature.Provider" Version="10.1.1" />

For projects that support PackageReference, copy this XML node into the project file to reference the package.

<PackageVersion Include="Flare.OpenFeature.Provider" Version="10.1.1" />
                    

                            Directory.Packages.props

<PackageReference Include="Flare.OpenFeature.Provider" />
                    

                            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 Flare.OpenFeature.Provider --version 10.1.1

The NuGet Team does not provide support for this client. Please contact its maintainers for support.

#r "nuget: Flare.OpenFeature.Provider, 10.1.1"

#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 Flare.OpenFeature.Provider@10.1.1

#: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=Flare.OpenFeature.Provider&version=10.1.1
                    

                            Install as a Cake Addin

#tool nuget:?package=Flare.OpenFeature.Provider&version=10.1.1
                    

                            Install as a Cake Tool

The NuGet Team does not provide support for this client. Please contact its maintainers for support.

Flare.OpenFeature.Provider

OpenFeature provider for Flare feature flag management system. Supports in-memory caching with background polling, provider lifecycle events, and automatic context conversion.

Installation

dotnet add package Flare.OpenFeature.Provider

Quick Start

services.AddOpenFeature(builder =>
{
    builder.AddFlareProvider(new FlareApiClientOptions
    {
        BaseUrl = "https://flare.example.com",
        ApiKey = "your-api-key",
        Scope = "production"
    });
});

With `IConfiguration` binding

{
  "Flare": {
    "BaseUrl": "https://flare.example.com",
    "ApiKey": "your-api-key",
    "Scope": "production"
  }
}

services.AddOpenFeature(builder =>
{
    builder.AddFlareProvider(configuration);
});

With custom caching options

services.AddOpenFeature(builder =>
{
    builder.AddFlareProvider(
        new FlareApiClientOptions
        {
            BaseUrl = "https://flare.example.com",
            ApiKey = "your-api-key",
            Scope = "production"
        },
        new FlareProviderOptions
        {
            PollingInterval = TimeSpan.FromSeconds(15),
            StaleThreshold = 5,
            CachingEnabled = true
        });
});

Evaluating Flags

public class MyService
{
    private readonly IFeatureClient _client;

    public MyService(IFeatureClient client) => _client = client;

    public async Task DoWork()
    {
        var isEnabled = await _client.GetBooleanValueAsync("my-flag", false);
    }
}

Features

Caching and Background Polling

When caching is enabled (default), the provider:

Fetches all flags on initialization and populates an in-memory cache
Resolves flags from cache for near-instant evaluations
Polls the Flare API in the background to keep the cache fresh
Emits OpenFeature events on flag changes, errors, and staleness

Cache reads are lock-free using volatile reference swap for minimal overhead on the hot path.

Provider Events

The provider emits standard OpenFeature events:

Event	When
`ProviderConfigurationChanged`	Background poll detects flag value or variant changes
`ProviderError`	A poll attempt fails
`ProviderStale`	Consecutive poll failures exceed the stale threshold

Direct Evaluation Fallback

When caching is disabled, flags are evaluated directly against the Flare API per request. Errors are surfaced as OpenFeature FeatureProviderException subtypes (GeneralException, ProviderNotReadyException, ParseErrorException, etc.), which the SDK handles automatically.

Configuration Options

`FlareApiClientOptions`

Option	Type	Default	Description
`BaseUrl`	`string`	Required	Flare API base URL
`ApiKey`	`string`	Required	API key for authentication
`Scope`	`string`	Required	Scope/environment (e.g., `"production"`)

`FlareProviderOptions`

Option	Type	Default	Description
`PollingInterval`	`TimeSpan`	`30s`	Background poll interval
`StaleThreshold`	`int`	`3`	Consecutive failures before emitting `ProviderStale`
`CachingEnabled`	`bool`	`true`	Enable in-memory caching with background polling

Supported Value Types

Currently only boolean flag evaluation is supported. Calling GetStringValueAsync, GetIntegerValueAsync, GetDoubleValueAsync, or GetStructureValueAsync will throw a TypeMismatchException.

License

MIT License - see LICENSE for details.

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 was computed. 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 was computed. 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.

.NETStandard 2.0
- Flare.HttpClient (>= 10.0.0)
- Microsoft.Extensions.Configuration.Abstractions (>= 10.0.2)
- Microsoft.Extensions.Configuration.Binder (>= 10.0.2)
- Microsoft.Extensions.Http (>= 10.0.2)
- Microsoft.Extensions.Logging.Abstractions (>= 10.0.2)
- Microsoft.Extensions.Options (>= 10.0.2)
- OpenFeature (>= 2.11.1)
- OpenFeature.Hosting (>= 2.11.1)
- System.Net.Http (>= 4.3.4)
- System.Text.Json (>= 10.0.2)

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
10.1.1	61	3/26/2026
10.1.0	31	3/25/2026
10.0.0-alpha	110	1/28/2026