Scalar .NET API Reference Integration

This .NET package Scalar.AspNetCore provides an easy way to render a beautiful API reference based on an OpenAPI/Swagger. Made possible by the wonderful work of captainsafia on building the integration & docs written for the Scalar & .NET integration.

🚀 Getting Started

1. Install the package

dotnet add package Scalar.AspNetCore

2. Add the using directive

using Scalar.AspNetCore;

3. Configure your application

Add the following lines to your Program.cs for .NET 9:

builder.Services.AddOpenApi();

if (app.Environment.IsDevelopment())
{
    app.MapOpenApi();
    app.MapScalarApiReference();
}

or for .NET 8 with Swashbuckle:

builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen();

if (app.Environment.IsDevelopment())
{
    app.UseSwagger(options =>
    {
        options.RouteTemplate = "openapi/{documentName}.json";
    });
    app.MapScalarApiReference();
}

That's it! 🎉 Now you will see the Scalar UI when using the defaults by navigating to /scalar/v1 in your browser.

Configuration

The MapScalarApiReference method has an optional parameter that you can use to customize the behavior of the Scalar UI:

// Fluent api
app.MapScalarApiReference(options =>
{
    options
        .WithTitle("My custom API")
        .WithTheme(ScalarTheme.Mars)
        .WithSidebar(false)
        .WithDefaultHttpClient(ScalarTarget.CSharp, ScalarClient.HttpClient)
        .WithPreferredScheme("ApiKey")
        .WithApiKeyAuthentication(x => x.Token = "my-api-key");
});

// Object initializer
app.MapScalarApiReference(options =>
{
    options.Title = "My custom API";
    options.Theme = ScalarTheme.Mars;
    options.ShowSidebar = false;
    options.DefaultHttpClient = new(ScalarTarget.CSharp, ScalarClient.HttpClient);
    options.Authentication = new ScalarAuthenticationOptions
    {
        PreferredSecurityScheme = "ApiKey",
        ApiKey = new ApiKeyOptions
        {
            Token = "my-api-key"
        }
    };
});

For more possible options and their default values, check out the ScalarOptions.cs class.

It is also possible to configure the options via dependency injection, using the options pattern:

builder.Services.Configure<ScalarOptions>(options => options.Title = "My custom API");
// or
builder.Services.AddOptions<ScalarOptions>().BindConfiguration("Scalar");

[!NOTE]
Options which are set via the MapScalarApiReference method will take precedence over options set via dependency injection.

Building & Release

dotnet build
dotnet pack --configuration Release
# then ping marc until we set up ci auto release!