62 codes

Code	Status	Category	Description
100	Continue	1xx	The server has received the request headers and the client should proceed to send the request body.
101	Switching Protocols	1xx	The requester has asked the server to switch protocols and the server has agreed.
102	Processing	1xx	The server has received and is processing the request, but no response is available yet.
103	Early Hints	1xx	Used to return some response headers before final HTTP message.
200	OK	2xx	Standard success response. The request was successfully received, understood, and accepted.
201	Created	2xx	The request was fulfilled and a new resource was created. Common after POST.
202	Accepted	2xx	The request has been accepted but processing is not yet complete (async operations).
203	Non-Authoritative Information	2xx	The server successfully processed the request but is returning info from another source.
204	No Content	2xx	The server successfully processed the request and is not returning any content.
205	Reset Content	2xx	The server successfully processed the request, asks the requester to reset the document view.
206	Partial Content	2xx	The server is delivering only part of the resource due to a range header sent by the client.
207	Multi-Status	2xx	The message body contains multiple separate response codes (WebDAV).
208	Already Reported	2xx	Members of a DAV binding have already been enumerated in a previous reply.
226	IM Used	2xx	The server has fulfilled a GET request for the resource; response is a representation of the result.
300	Multiple Choices	3xx	Indicates multiple options for the resource from which the client may choose.
301	Moved Permanently	3xx	This and all future requests should be directed to the given URI.
302	Found	3xx	Tells the client to look at (browse to) another URL. Temporary redirect.
303	See Other	3xx	The response to the request can be found under another URI using the GET method.
304	Not Modified	3xx	Indicates that the resource has not been modified since the version specified by request headers.
305	Use Proxy	3xx	The requested resource is available only through a proxy, the address for which is provided.
307	Temporary Redirect	3xx	The request should be repeated with another URI; however, future requests should still use the original URI.
308	Permanent Redirect	3xx	All future requests should use another URI. Similar to 301 but the method must not change.
400	Bad Request	4xx	The server cannot or will not process the request due to an apparent client error.
401	Unauthorized	4xx	Authentication is required and has failed or has not yet been provided.
402	Payment Required	4xx	Reserved for future use, sometimes used for digital payment systems.
403	Forbidden	4xx	The request was valid, but the server is refusing action. Insufficient permissions.
404	Not Found	4xx	The requested resource could not be found. The most well-known HTTP status code.
405	Method Not Allowed	4xx	A request method is not supported for the requested resource (e.g. DELETE on a read-only endpoint).
406	Not Acceptable	4xx	The requested resource is capable of generating only content not acceptable by the Accept headers.
407	Proxy Auth Required	4xx	The client must first authenticate itself with the proxy.
408	Request Timeout	4xx	The server timed out waiting for the request.
409	Conflict	4xx	Indicates that the request could not be processed because of conflict in the current state of the resource.
410	Gone	4xx	Indicates that the resource requested was previously in use but is no longer available.
411	Length Required	4xx	The request did not specify the length of its content, which is required by the requested resource.
412	Precondition Failed	4xx	The server does not meet one of the preconditions specified in the request headers.
413	Content Too Large	4xx	The request is larger than the server is willing or able to process.
414	URI Too Long	4xx	The URI provided was too long for the server to process.
415	Unsupported Media Type	4xx	The request entity has a media type which the server or resource does not support.
416	Range Not Satisfiable	4xx	The client has asked for a portion of the file but the server cannot supply that portion.
417	Expectation Failed	4xx	The server cannot meet the requirements of the Expect request-header field.
418	I'm a Teapot	4xx	The server refuses to brew coffee because it is, permanently, a teapot. (RFC 2324 — April Fools')
421	Misdirected Request	4xx	The request was directed at a server that is not able to produce a response.
422	Unprocessable Content	4xx	The request was well-formed but was unable to be followed due to semantic errors.
423	Locked	4xx	The resource that is being accessed is locked.
424	Failed Dependency	4xx	The request failed because it depended on another request and that request failed.
425	Too Early	4xx	The server is unwilling to risk processing a request that might be replayed.
426	Upgrade Required	4xx	The client should switch to a different protocol such as TLS/1.3.
428	Precondition Required	4xx	The origin server requires the request to be conditional.
429	Too Many Requests	4xx	The user has sent too many requests in a given amount of time (rate limiting).
431	Request Header Fields Too Large	4xx	The server is unwilling to process the request because its header fields are too large.
451	Unavailable For Legal Reasons	4xx	A server operator has received a legal demand to deny access to a resource.
500	Internal Server Error	5xx	A generic error message when an unexpected condition was encountered on the server.
501	Not Implemented	5xx	The server either does not recognize the request method, or lacks the ability to fulfill the request.
502	Bad Gateway	5xx	The server was acting as a gateway or proxy and received an invalid response from the upstream server.
503	Service Unavailable	5xx	The server cannot handle the request (overloaded or down for maintenance).
504	Gateway Timeout	5xx	The server was acting as a gateway or proxy and did not receive a timely response from the upstream server.
505	HTTP Version Not Supported	5xx	The server does not support the HTTP version used in the request.
506	Variant Also Negotiates	5xx	Transparent content negotiation for the request results in a circular reference.
507	Insufficient Storage	5xx	The server is unable to store the representation needed to complete the request.
508	Loop Detected	5xx	The server detected an infinite loop while processing a request.
510	Not Extended	5xx	Further extensions to the request are required for the server to fulfil it.
511	Network Auth Required	5xx	The client needs to authenticate to gain network access (captive portals).