aspnet-minimal-api-openapi

To add OpenAPI documentation to ASP.NET Minimal API endpoints, you define summaries, descriptions, operation names, response metadata, and document or schema transformers directly on your endpoint configurations for polished API docs.

The best way to structure large Minimal APIs in ASP.NET is to group related routes with MapGroup, apply endpoint filters, and split larger APIs into feature-focused endpoint classes for maintainability.

To return typed results and ProblemDetails in a Minimal API, use TypedResults or Results<T1, T2> for strongly typed route binding, and configure validation attributes on your request DTOs to generate predictable error responses.

Yes, you can use feature-based endpoint classes with ASP.NET Minimal APIs by splitting larger APIs into focused classes, organizing routes with MapGroup, and applying endpoint filters for consistent request handling.

Minimal APIs handle request and response DTO modeling for production by defining explicit DTOs using records, applying validation attributes, and returning strongly typed results to ensure type-safe contracts.

Your Minimal API Swagger documentation lacks response metadata because you need to explicitly configure OpenAPI summaries, descriptions, operation names, and schema transformers on your endpoints for complete API docs.