REFERENCE
HTTP Status Codes
The HTTP status codes that come up in URL and redirect debugging, grouped by category. Each detail page covers what the code means, common causes, how to fix it, examples, and how it differs from related codes.
2xx Success
3xx Redirect
301
Moved Permanently
302
Found (Temporary Redirect)
303
See Other
307
Temporary Redirect
308
Permanent Redirect
4xx Client Error
400
Bad Request
401
Unauthorized
403
Forbidden
404
Not Found
405
Method Not Allowed
410
Gone
408
Request Timeout
415
Unsupported Media Type
422
Unprocessable Entity
429
Too Many Requests