HTTP 404 Not Found

What this status code means

Not Found describes how the server processed the request and what the client should do next.

Who should act first

Client request or identity context is usually the first place to fix.

What to check first

• Capture exact request path, method, and headers.
• Verify authentication and authorization context.
• Validate payload schema and content type.

How it differs from similar codes

• HTTP 400 Bad Request — full guide
• HTTP 403 Forbidden — full guide
• HTTP 410 Gone — full guide

Reference and next step

Specification: RFC 9110.

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