http status codes.txt

Value 	Description 	Reference 
100	Continue	[RFC7231, Section 6.2.1]
101	Switching Protocols	[RFC7231, Section 6.2.2]
102	Processing	[RFC2518]
103	Early Hints	[RFC8297]
104-199	Unassigned	
200	OK	[RFC7231, Section 6.3.1]
201	Created	[RFC7231, Section 6.3.2]
202	Accepted	[RFC7231, Section 6.3.3]
203	Non-Authoritative Information	[RFC7231, Section 6.3.4]
204	No Content	[RFC7231, Section 6.3.5]
205	Reset Content	[RFC7231, Section 6.3.6]
206	Partial Content	[RFC7233, Section 4.1]
207	Multi-Status	[RFC4918]
208	Already Reported	[RFC5842]
209-225	Unassigned	
226	IM Used	[RFC3229]
227-299	Unassigned	
300	Multiple Choices	[RFC7231, Section 6.4.1]
301	Moved Permanently	[RFC7231, Section 6.4.2]
302	Found	[RFC7231, Section 6.4.3]
303	See Other	[RFC7231, Section 6.4.4]
304	Not Modified	[RFC7232, Section 4.1]
305	Use Proxy	[RFC7231, Section 6.4.5]
306	(Unused)	[RFC7231, Section 6.4.6]
307	Temporary Redirect	[RFC7231, Section 6.4.7]
308	Permanent Redirect	[RFC7538]
309-399	Unassigned	
400	Bad Request	[RFC7231, Section 6.5.1]
401	Unauthorized	[RFC7235, Section 3.1]
402	Payment Required	[RFC7231, Section 6.5.2]
403	Forbidden	[RFC7231, Section 6.5.3]
404	Not Found	[RFC7231, Section 6.5.4]
405	Method Not Allowed	[RFC7231, Section 6.5.5]
406	Not Acceptable	[RFC7231, Section 6.5.6]
407	Proxy Authentication Required	[RFC7235, Section 3.2]
408	Request Timeout	[RFC7231, Section 6.5.7]
409	Conflict	[RFC7231, Section 6.5.8]
410	Gone	[RFC7231, Section 6.5.9]
411	Length Required	[RFC7231, Section 6.5.10]
412	Precondition Failed	[RFC7232, Section 4.2][RFC8144, Section 3.2]
413	Payload Too Large	[RFC7231, Section 6.5.11]
414	URI Too Long	[RFC7231, Section 6.5.12]
415	Unsupported Media Type	[RFC7231, Section 6.5.13][RFC7694, Section 3]
416	Range Not Satisfiable	[RFC7233, Section 4.4]
417	Expectation Failed	[RFC7231, Section 6.5.14]
418-420	Unassigned	
421	Misdirected Request	[RFC7540, Section 9.1.2]
422	Unprocessable Entity	[RFC4918]
423	Locked	[RFC4918]
424	Failed Dependency	[RFC4918]
425	Too Early	[RFC8470]
426	Upgrade Required	[RFC7231, Section 6.5.15]
427	Unassigned	
428	Precondition Required	[RFC6585]
429	Too Many Requests	[RFC6585]
430	Unassigned	
431	Request Header Fields Too Large	[RFC6585]
432-450	Unassigned	
451	Unavailable For Legal Reasons	[RFC7725]
452-499	Unassigned	
500	Internal Server Error	[RFC7231, Section 6.6.1]
501	Not Implemented	[RFC7231, Section 6.6.2]
502	Bad Gateway	[RFC7231, Section 6.6.3]
503	Service Unavailable	[RFC7231, Section 6.6.4]
504	Gateway Timeout	[RFC7231, Section 6.6.5]
505	HTTP Version Not Supported	[RFC7231, Section 6.6.6]
506	Variant Also Negotiates	[RFC2295]
507	Insufficient Storage	[RFC4918]
508	Loop Detected	[RFC5842]
509	Unassigned	
510	Not Extended	[RFC2774]
511	Network Authentication Required	[RFC6585]
512-599	Unassigned