Instrument ASP.NET Core APIs.

dotnet add package Apirelio.AspNetCore --version 0.2.0

var builder = WebApplication.CreateBuilder(args);
builder.Services.AddApirelio(builder.Configuration);

var app = builder.Build();
app.UseApirelio();
app.MapControllers();
app.Run();

{
  "Apirelio": {
    "ApiKey": "apr_live_your_key",
    "Endpoint": "https://apirelio.com",
    "Service": "billing-api",
    "Environment": "production",
    "Release": "2026.08.07.1",
    "IncludeRoutes": ["/api/**"],
    "ExcludeRoutes": ["/api/health"],
    "MetadataKeys": ["region"]
  }
}

builder.Services.AddScoped<IApirelioCustomerResolver, CustomerResolver>();

sealed class CustomerResolver : IApirelioCustomerResolver
{
    public ApirelioCustomer? Resolve(HttpContext context)
    {
        var account = context.Items["account"] as Account;
        return account is null ? null : new(
            account.Id.ToString(), account.Name, account.Plan);
    }
}

builder.Services.AddScoped<IApirelioApplicationResolver, ApplicationResolver>();
builder.Services.AddScoped<IApirelioMetadataResolver, MetadataResolver>();

// MetadataResolver may return only configured scalar keys.
// Error-code and resolver failures are isolated from the response.