How can I integrate Swagger or OpenAPI documentation into a .NET Core Web API
You could refer to the document:
Get started with Swashbuckle and ASP.NET Core
.NET OpenAPI tool command reference and installation
what advantages does it offer in terms of documenting and testing API endpoints?
API testing is challenging, as it requires complex tools, scripts, and protocols. That's where Swagger/OpenApi comes in. Swagger/OpenApi is an open-source framework that simplifies API testing by providing a user-friendly interface, documentation, and automation features.
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Best regards,
Rena