Complete guide to HTTP response status codes
Server received headers, client should send body
Server agrees to switch protocols (e.g., WebSocket)
Request succeeded, response body contains data
Resource successfully created (POST)
Success but no response body
Partial resource returned (Range header)
Resource permanently moved to new URL
Temporary redirect (formerly "Moved Temporarily")
Cached version is still valid
Redirect preserving method and body
Permanent redirect preserving method
Malformed request syntax
Authentication required
Access denied (authenticated but not allowed)
Resource does not exist
HTTP method not supported for this resource
Server timed out waiting for request
Rate limit exceeded
Content blocked due to legal reasons
Generic server error
Server doesn't support request method
Invalid response from upstream server
Server temporarily overloaded or down
Upstream server didn't respond in time