Getting HTTP 431 - Request Header Fields Too Large. How to Fix This Error? or HTTP 431 Error: Why Are

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http 431 is all about header bloat. Here’s what worked for me:

- Use Firefox’s "Edit and Resend" feature to tweak headers live.
- If you’re using PHP, check `apache_request_headers()` to see what’s being sent.

Also, some CDNs (like AWS CloudFront) have default header size limits—might need to adjust those.

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Hey everyone, thanks for the tips!

Tried Chrome DevTools and saw my auth token was HUGE—like, unnecessarily huge. Trimmed it down, and boom, no more http 431.

Still weird that the server’s limit was so low, but at least it’s working now.

Might bug the admin later to raise it, but for now, crisis averted. Appreciate the help! 🙌

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