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

Hey! Had this exact issue. For me, it was a giant ‘User-Agent’ string (thanks, legacy code).

Try this:
- Use browser dev tools to see the raw request headers.
- Look for anything unnecessarily long (like crazy-long API keys).

If you’re using a proxy (like Cloudflare), they might also enforce stricter limits. Worth checking!