201201 Created
The request has been fulfilled and a new resource has been created as a result.
522Cloudflare could not negotiate a TCP handshake with the origin server.
The origin server did not respond to the TCP connection attempt within the timeout period. This can be caused by server overload, firewall blocking, incorrect origin IP in Cloudflare settings, or network routing issues.
Verify the origin IP address in Cloudflare DNS settings is correct. Check that your firewall allows connections from Cloudflare IPs. Ensure the origin server is not overloaded and can accept new connections.
201The request has been fulfilled and a new resource has been created as a result.
422The server understands the content type and syntax but cannot process the contained instructions due to semantic errors.
421The request was directed at a server that is not able to produce a response for the combination of scheme and authority in the request URI.
203The response has been modified by a transforming proxy and differs from what the origin server sent.
101The server is switching protocols as requested by the client via an Upgrade header.
308The resource has permanently moved to a new URL, and the request method must not change when following the redirect.