Ricardo Peres • 1/7/2026

ASP.NET Core Pitfalls - Content Type Mismatch

This technical article details a specific pitfall in ASP.NET Core where the [Consumes] attribute for API endpoints requires an exact match of the Content-Type header, including the charset parameter. It explains how a mismatch (e.g., sending 'application/json' vs. 'application/json;charset=utf-8') can cause a 404 error and provides the coding solution to accept multiple related content types.

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#api #http #Aspnet Core