70+ HTTP Error Codes CheatSheet

Sr. No	Category	HTTP Status Code	Description
1	1xx	100 Continue	The server indicates that it will follow the client's request.
2		101 Switching Protocols	The server agrees to switch protocols based on the client's request.
3		102 Processing	The server is still processing the request.
4	2xx	200 OK	The request was successful.
5		201 Created	The request resulted in a new resource being created.
6		202 Accepted	The request has been accepted for processing, but processing is not complete.
7		204 No Content	The request was successful, but there's no response body.
8		206 Partial Content	The server has fulfilled a partial GET request.
9	3xx	300 Multiple Choices	Indicates multiple options for the resource from the server.
10		301 Moved Permanently	The requested resource has been permanently moved to a new location.
11		302 Found	The requested resource is temporarily located at a different URI.
12		303 See Other	The response to the request can be found under a different URI.
13		304 Not Modified	The client can use cached data as the resource hasn't been modified.
14		307 Temporary Redirect	The requested resource is temporarily located at a different URI.
15	4xx	400 Bad Request	The server couldn't understand the request.
16		401 Unauthorized	Authentication is required and failed or not provided.
17		402 Payment Required	This status code is not used in the HTTP/1.1 specification.
18		403 Forbidden	The server understood the request but refuses to authorize it.
19		404 Not Found	The requested resource could not be found on the server.
20		405 Method Not Allowed	The method specified in the request is not allowed for the resource.
21		406 Not Acceptable	The server cannot produce a response matching the list of acceptable values defined in the request.
22		407 Proxy Authentication Required	The client must first authenticate itself with the proxy.
23		408 Request Timeout	The server did not receive a complete request in the time it was prepared to wait.
24		409 Conflict	The request could not be completed due to a conflict with the current state of the target resource.
25		410 Gone	The requested resource is no longer available and will not be available again.
26		411 Length Required	The server refuses to accept the request without a defined Content-Length header.
27		412 Precondition Failed	The client provided a precondition in its request headers that the server does not meet.
28		413 Payload Too Large	The request is larger than the server is willing or able to process.
29		414 URI Too Long	The URI provided was too long for the server to process.
30		415 Unsupported Media Type	The server does not support the media type transmitted in the request.
31		416 Range Not Satisfiable	The requested range is not available for the resource.
32		417 Expectation Failed	The expectation given in the request's Expect header could not be met.
33		418 I'm a teapot	This status code is part of the April Fools' jokes and not used in the HTTP/1.1 specification.
34		421 Misdirected Request	The server is not able to produce a response due to a semantic error in the client's request.
35		422 Unprocessable Entity	The request was well-formed but was unable to be followed due to semantic errors.
36		423 Locked	The resource that is being accessed is locked.
37		424 Failed Dependency	The request failed due to a failure of a previous request.
38		426 Upgrade Required	The server refuses to perform the request using the current protocol.
39		428 Precondition Required	The server requires the request to be conditional.
40		429 Too Many Requests	The user has sent too many requests in a given amount of time.
41		431 Request Header Fields Too Large	The server is unwilling to process the request because its header fields are too large.
42		451 Unavailable For Legal Reasons	The server is denying access to the resource as a consequence of a legal demand.
43	5xx	500 Internal Server Error	An unexpected condition was encountered by the server.
44		501 Not Implemented	The server does not support the functionality required to fulfill the request.
45		502 Bad Gateway	The server, while acting as a gateway or proxy, received an invalid response from the upstream server.
46		503 Service Unavailable	The server is not ready to handle the request.
47		504 Gateway Timeout	The server, acting as a gateway, did not receive a response from an upstream server.
48		505 HTTP Version Not Supported	The server does not support the HTTP protocol version used in the request.
49		506 Variant Also Negotiates	The server has an internal configuration error.
50		507 Insufficient Storage	The server is unable to store the representation needed to complete the request.
51		508 Loop Detected	The server detected an infinite loop while processing the request.
52		510 Not Extended	Further extensions to the request are required for the server to fulfill it.
53		511 Network Authentication Required	The client must authenticate to gain network access.
54		520 Unknown Error	The server returned an unknown error.
55		521 Web Server Is Down	The origin server has refused the connection.
56		522 Connection Timed Out	The server connection timed out.
57		523 Origin Is Unreachable	The origin server is not reachable.
58		524 A Timeout Occurred	A timeout occurred on the server.
59		525 SSL Handshake Failed	The SSL handshake failed on the server.
60		526 Invalid SSL Certificate	The server returned an invalid SSL certificate.
61		527 Railgun Error	The Railgun Listener to origin error.
62		530 Origin DNS Error	Error occurred while DNS resolution.
63		531 Web Server Is Down	The origin server has refused the connection.
64		532 Connection Timed Out	The server connection timed out.
65		533 Origin Is Unreachable	The origin server is not reachable.
66		534 A Timeout Occurred	A timeout occurred on the server.
67		535 SSL Handshake Failed	The SSL handshake failed on the server.
68		536 Invalid SSL Certificate	The server returned an invalid SSL certificate.
69		537 Railgun Error	The Railgun Listener to origin error.
70		540 Origin Not Configured	The origin server is not configured.
71		541 Web Server Is Down	The origin server has refused the connection.
72		542 Connection Timed Out	The server connection timed out.
73		543 Origin Is Unreachable	The origin server is not reachable.
74		544 A Timeout Occurred	A timeout occurred on the server.
75		545 SSL Handshake Failed	The SSL handshake failed on the server.
76		546 Invalid SSL Certificate	The server returned an invalid SSL certificate.
77		547 Railgun Error	The Railgun Listener to origin error.

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