Pandatech.FluentMinimalApiMapper

A lightweight helper for auto-discovering and registering Minimal API endpoints across assemblies. Define IEndpoint, call two methods in Program.cs, and every endpoint in your project is wired up automatically.

Inspired by Carter's routing concept but stripped to the essentials — no dependencies beyond ASP.NET Core itself.

Targets net8.0, net9.0, and net10.0.

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Table of Contents

1. Features
2. Installation
3. Getting Started
4. Multiple Assemblies
5. Route Grouping

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Features

• Auto-discovers all IEndpoint implementations at startup via reflection — once, not per request
• Works across multiple assemblies for modular monolith and vertical slice layouts
• TryAddEnumerable registration prevents duplicates if the same assembly is scanned more than once
• No configuration required, no base classes, no attributes

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Installation

dotnet add package Pandatech.FluentMinimalApiMapper

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Getting Started

1. Define an endpoint

public class ProductEndpoints : IEndpoint
{
    public void AddRoutes(IEndpointRouteBuilder app)
    {
        app.MapGet("/products", () => Results.Ok());
        app.MapPost("/products", () => Results.Created());
    }
}

2. Register and map in Program.cs

builder.AddMinimalApis(); // scans entry assembly by default

var app = builder.Build();

app.MapMinimalApis();
app.Run();

That's all. Every IEndpoint implementation in the entry assembly is discovered and registered automatically.

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Multiple Assemblies

Pass any number of assemblies explicitly — useful in modular monolith setups where each module lives in its own project:

builder.AddMinimalApis(
    typeof(ProductEndpoints).Assembly,
    typeof(OrderEndpoints).Assembly);

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Route Grouping

Pass a RouteGroupBuilder to MapMinimalApis to apply shared configuration (prefix, auth policy, filters, etc.) to all discovered endpoints at once:

var api = app.MapGroup("/api/v1").RequireAuthorization();
app.MapMinimalApis(api);

Or apply multiple group configurations selectively by calling MapMinimalApis more than once with different groups, scanning different assemblies each time.

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License

MIT