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November 29, 2025

C# & .NET · 13 min read

Building High-Performance APIs with ASP.NET Core Minimal APIs

Explore ASP.NET Core Minimal APIs for building lightweight, high-performance HTTP APIs with less boilerplate and maximum throughput.

Jax Harlen

Jax Harlen

@JaxHarlen

What are Minimal APIs?

Minimal APIs, introduced in .NET 6, provide a streamlined way to build HTTP APIs without the ceremony of controllers. They're perfect for microservices and high-performance scenarios.

Performance Comparison

In our benchmarks, Minimal APIs consistently outperform traditional controller-based APIs by 10-15% in requests per second while using less memory.

Organizing Large APIs

As your API grows, organization becomes crucial. We'll show you patterns for grouping endpoints, sharing dependencies, and maintaining clean code.

Validation and Error Handling

Implement robust validation using FluentValidation or the built-in validation attributes. Create consistent error responses that your API consumers can rely on.

Authentication Patterns

Secure your Minimal APIs with JWT authentication, API keys, or custom schemes. We cover the middleware pipeline and authorization policies.

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