ASP.NET Core gives us two ways to expose HTTP endpoints. Both are first-class. Both are production-ready.
But they solve different problems.
🧩 Minimal APIs — Fast, Focused, Lightweight
app.MapGet("/health", () => Results.Ok("OK"));
✅ When they shine
- Small APIs & microservices
- Prototypes & internal tools
- Simple CRUD
- Serverless / edge scenarios
👍 Why use them
- Minimal ceremony
- Fewer files
- Very readable
- Easy to reason about
⚠️ Watch out
- Can become messy at scale
- Cross-cutting concerns need discipline
- Less natural for complex APIs
🧱 Controllers — Structured, Scalable, Explicit
[ApiController]
[Route("api/orders")]
public class OrdersController : ControllerBase
{
[HttpGet("{id}")]
public IActionResult Get(int id) => Ok();
}
✅ When they shine
- Medium to large APIs
- Complex domains
- Enterprise systems
- Teams with many developers
👍 Why use them
- Clear structure & conventions
- Filters, attributes, model binding
- Better separation of concerns
- Easier long-term maintenance
⚠️ Trade-offs
- More boilerplate
- More files
- Slightly slower to start
⚖️ Key Differences at a Glance
| Concern | Minimal APIs | Controllers |
|---|---|---|
| Setup | Ultra-fast | Structured |
| Scale | Small → Medium | Medium → Large |
| Filters | Endpoint filters | Action filters |
| Organization | Code-driven | Convention-driven |
| Team size | Small | Medium / Large |
| Maintainability | Needs discipline | Built-in |
🧠 Architecture Insight
This is not a performance discussion. It’s a maintainability and scale discussion.
Minimal APIs optimize for speed of writing. Controllers optimize for speed of understanding.
🏗️ Best Practice in Real Projects
Many production systems use both:
app.MapGet("/health", () => Results.Ok());
app.MapControllers();
- Minimal APIs → infra & utility endpoints
- Controllers → business endpoints
🎯 Final Tip
Choose based on:
- Team size
- Domain complexity
- Expected lifespan
- Maintenance cost
Not on trends.
#dotnet #csharp #aspnetcore #minimalapi #webapi #softwarearchitecture #cleanCode