HTTP 506 Variant Also Negotiates — What It Means & How to Fix It

The HTTP 506 Variant Also Negotiates status code indicates that the server has an internal configuration error where the chosen variant resource is configured to engage in content negotiation itself. This guide covers everything you need to know about this topic, including common causes, step-by-step solutions, and answers to frequently asked questions.

Here are the key things to understand: This status code is defined in RFC 2295 for Transparent Content Negotiation.. It indicates a circular reference in content negotiation configuration.. The chosen variant should provide a fixed response, not negotiate further.. It is extremely rare in practice.. Understanding these fundamentals will help you diagnose and resolve this issue more effectively.

The most common reasons this occurs include: Misconfigured transparent content negotiation on the server.. A variant resource incorrectly configured to also perform content negotiation.. Circular reference in the server content negotiation setup.. Identifying the root cause is the first step toward finding the right solution.

To resolve this, follow these recommended steps: Fix the server content negotiation configuration to break the circular reference.. Ensure variant resources return fixed responses without further negotiation.. Review the Alternates header for misconfigured variants.. Simplify content negotiation rules on the server.. If these steps do not resolve the issue, consider consulting additional resources or a qualified professional.

This article is part of our HTTP Status Codes collection on Error Codes Wiki. We provide comprehensive, up-to-date information to help you find solutions quickly.