API key authentication is yet another approach you can adopt to help secure your APIs. You can use a user authentication mechanism such as JWT tokens, ASP.NET Core Identity, bearer tokens, OpenID Connect, or an OAuth 2.0 identity provider. For that, you would also need to implement user authentication in ASP.
Table of contents
Create an ASP.NET Core Web API project in Visual Studio 2022Implement API key authentication using middlewareImplement API key authentication using custom attributesConclusionSort: