https://remigiuszzalewski.com/blog Blog about .NET/C#/Angular/React/Azure en-us remigiuszzalewski.business@gmail.com (Remigiusz Zalewski) remigiuszzalewski.business@gmail.com (Remigiusz Zalewski) Tue, 04 Aug 2026 00:00:00 GMT https://remigiuszzalewski.com/blog/api-key-authentication-aspnet-core https://remigiuszzalewski.com/blog/api-key-authentication-aspnet-core API keys are the right fit for server-to-server APIs where full OAuth is overkill. Three ways to enforce one in ASP.NET Core - middleware, an MVC filter, and a minimal API endpoint filter - and when each fits. Tue, 04 Aug 2026 00:00:00 GMT remigiuszzalewski.business@gmail.com (Remigiusz Zalewski) .netcsharpaspnetcoreauthenticationapi-keysecurity