100 Continue
101 Switching Protocols
103 Early Hints
200 OK
201 Created
202 Accepted
203 Non-Authoritative Information
204 No Content
205 Reset Content
206 Partial Content
300 Multiple Choices
301 Moved Permanently
302 Found
303 See Other
304 Not Modified
307 Temporary Redirect
308 Permanent Redirect
400 Bad Request
401 Unauthorized
402 Payment Required
403 Forbidden
404 Not Found
405 Method Not Allowed
406 Not Acceptable
407 Proxy Authentication Required
408 Request Timeout
409 Conflict
410 Gone
411 Length Required
412 Precondition Failed
413 Payload Too Large
414 URI Too Long
415 Unsupported Media Type
416 Range Not Satisfiable
417 Expectation Failed
418 I'm a teapot
422 Unprocessable Entity
425 Too Early
426 Upgrade Required
428 Precondition Required
429 Too Many Requests
431 Request Header Fields Too Large
451 Unavailable For Legal Reasons
500 Internal Server Error
501 Not Implemented
502 Bad Gateway
503 Service Unavailable
504 Gateway Timeout
505 HTTP Version Not Supported
506 Variant Also Negotiates
507 Insufficient Storage
508 Loop Detected
510 Not Extended
511 Network Authentication Required

2xx : SUCCESS	200 OK : success	201 CREATED : successfully added data	204 NO-CONTENT successfully updated or deleted 3xx : REDIRECTION	304 NOT MODIFIED:	4xx : CLIENT SIDE ERROR	400 BAD REQUEST : bad data being sent 401 UNAUTHORIZED : 403 FORBIDDEN :	404 NOT FOUND : the resource does not exists at that location	405 METHOD NOT ALLOWED :	DELETE /api/spartans -->> 405 error	406 NOT ACCEPTABLE	415 Unsupported Media type	if you forget to specify the Content-Type	of Post request body, it will see it as plain text	and it will throw this error if it does not support	5xx : Server side error	500 internal service error	If the server do not have any mapping of the url	requested to handle the action -->> 500 503 SERVICE UNAVAILABLE : 504 GATEWAY TIMEOUT :

{ '100': 'Continue', '101': 'Switching Protocols', '102': 'Processing', '103': 'Early Hints', '200': 'OK', '201': 'Created', '202': 'Accepted', '203': 'Non-Authoritative Information', '204': 'No Content', '205': 'Reset Content', '206': 'Partial Content', '207': 'Multi-Status', '208': 'Already Reported', '226': 'IM Used', '300': 'Multiple Choices', '301': 'Moved Permanently', '302': 'Found', '303': 'See Other', '304': 'Not Modified', '305': 'Use Proxy', '307': 'Temporary Redirect', '308': 'Permanent Redirect', '400': 'Bad Request', '401': 'Unauthorized', '402': 'Payment Required', '403': 'Forbidden', '404': 'Not Found', '405': 'Method Not Allowed', '406': 'Not Acceptable', '407': 'Proxy Authentication Required', '408': 'Request Timeout', '409': 'Conflict', '410': 'Gone', '411': 'Length Required', '412': 'Precondition Failed', '413': 'Payload Too Large', '414': 'URI Too Long', '415': 'Unsupported Media Type', '416': 'Range Not Satisfiable', '417': 'Expectation Failed', '418': "I'm a Teapot", '421': 'Misdirected Request', '422': 'Unprocessable Entity', '423': 'Locked', '424': 'Failed Dependency', '425': 'Too Early', '426': 'Upgrade Required', '428': 'Precondition Required', '429': 'Too Many Requests', '431': 'Request Header Fields Too Large', '451': 'Unavailable For Legal Reasons', '500': 'Internal Server Error', '501': 'Not Implemented', '502': 'Bad Gateway', '503': 'Service Unavailable', '504': 'Gateway Timeout', '505': 'HTTP Version Not Supported', '506': 'Variant Also Negotiates', '507': 'Insufficient Storage', '508': 'Loop Detected', '509': 'Bandwidth Limit Exceeded', '510': 'Not Extended', '511': 'Network Authentication Required' }
//minified
{"100":"Continue","101":"Switching Protocols","102":"Processing","103":"Early Hints","200":"OK","201":"Created","202":"Accepted","203":"Non-Authoritative Information","204":"No Content","205":"Reset Content","206":"Partial Content","207":"Multi-Status","208":"Already Reported","226":"IM Used","300":"Multiple Choices","301":"Moved Permanently","302":"Found","303":"See Other","304":"Not Modified","305":"Use Proxy","307":"Temporary Redirect","308":"Permanent Redirect","400":"Bad Request","401":"Unauthorized","402":"Payment Required","403":"Forbidden","404":"Not Found","405":"Method Not Allowed","406":"Not Acceptable","407":"Proxy Authentication Required","408":"Request Timeout","409":"Conflict","410":"Gone","411":"Length Required","412":"Precondition Failed","413":"Payload Too Large","414":"URI Too Long","415":"Unsupported Media Type","416":"Range Not Satisfiable","417":"Expectation Failed","418":"I'm a Teapot","421":"Misdirected Request","422":"Unprocessable Entity","423":"Locked","424":"Failed Dependency","425":"Too Early","426":"Upgrade Required","428":"Precondition Required","429":"Too Many Requests","431":"Request Header Fields Too Large","451":"Unavailable For Legal Reasons","500":"Internal Server Error","501":"Not Implemented","502":"Bad Gateway","503":"Service Unavailable","504":"Gateway Timeout","505":"HTTP Version Not Supported","506":"Variant Also Negotiates","507":"Insufficient Storage","508":"Loop Detected","509":"Bandwidth Limit Exceeded","510":"Not Extended","511":"Network Authentication Required"}

{
codes: [ { status: 100, message: "Continue " }, { status: 101, message: "Switching Protocols " }, { status: 102, message: "Processing " }, { status: 200, message: "OK " }, { status: 201, message: "Created " }, { status: 202, message: "Accepted " }, { status: 203, message: "Non - authoritative Information " }, { status: 204, message: "No Content " }, { status: 205, message: "Reset Content " }, { status: 206, message: "Partial Content " }, { status: 207, message: "Multi - Status " }, { status: 208, message: "Already Reported " }, { status: 226, message: "IM Used " }, { status: 300, message: "Multiple Choices " }, { status: 301, message: "Moved Permanently " }, { status: 302, message: "Found " }, { status: 303, message: "See Other " }, { status: 304, message: "Not Modified " }, { status: 305, message: "Use Proxy " }, { status: 307, message: "Temporary Redirect " }, { status: 308, message: "Permanent Redirect " }, { status: 400, message: "Bad Request " }, { status: 401, message: "Unauthorized " }, { status: 402, message: "Payment Required " }, { status: 403, message: "Forbidden " }, { status: 404, message: "Not Found " }, { status: 405, message: "Method Not Allowed " }, { status: 406, message: "Not Acceptable " }, { status: 407, message: "Proxy Authentication Required " }, { status: 408, message: "Request Timeout " }, { status: 409, message: "Conflict " }, { status: 410, message: "Gone " }, { status: 411, message: "Length Required " }, { status: 412, message: "Precondition Failed " }, { status: 413, message: "Payload Too Large " }, { status: 414, message: "Request - URI Too Long " }, { status: 415, message: "Unsupported Media Type " }, { status: 416, message: "Requested Range Not Satisfiable " }, { status: 417, message: "Expectation Failed " }, { status: 418, message: "I’m a teapot " }, { status: 421, message: "Misdirected Request " }, { status: 422, message: "Unprocessable Entity " }, { status: 423, message: "Locked " }, { status: 424, message: "Failed Dependency " }, { status: 426, message: "Upgrade Required " }, { status: 428, message: "Precondition Required " }, { status: 429, message: "Too Many Requests " }, { status: 431, message: "Request Header Fields Too Large " }, { status: 444, message: "Connection Closed Without Response " }, { status: 451, message: "Unavailable For Legal Reasons " }, { status: 499, message: "Client Closed Request " }, { status: 500, message: "Internal Server Error " }, { status: 501, message: "Not Implemented " }, { status: 502, message: "Bad Gateway " }, { status: 503, message: "Service Unavailable " }, { status: 504, message: "Gateway Timeout " }, { status: 505, message: "HTTP Version Not Supported " }, { status: 506, message: "Variant Also Negotiates " }, { status: 507, message: "Insufficient Storage " }, { status: 508, message: "Loop Detected " }, { status: 510, message: "Not Extended " }, { status: 511, message: "Network Authentication Required " }, { status: 599, message: "Network Connect Timeout Error" },
]
}

Here's a comprehensive list of all HTTP status codes:
- **1xx Informational** - 100 Continue - 101 Switching Protocols - 102 Processing (WebDAV) - 103 Early Hints
- **2xx Successful** - 200 OK - 201 Created - 202 Accepted - 203 Non-Authoritative Information (since HTTP/1.1) - 204 No Content - 205 Reset Content - 206 Partial Content - 207 Multi-Status (WebDAV) - 208 Already Reported (WebDAV) - 226 IM Used
- **3xx Redirection** - 300 Multiple Choices - 301 Moved Permanently - 302 Found - 303 See Other (since HTTP/1.1) - 304 Not Modified - 305 Use Proxy (since HTTP/1.1) - 306 Switch Proxy - 307 Temporary Redirect (since HTTP/1.1) - 308 Permanent Redirect (RFC 7538)
- **4xx Client errors** - 400 Bad Request - 401 Unauthorized - 402 Payment Required - 403 Forbidden - 404 Not Found - 405 Method Not Allowed - 406 Not Acceptable - 407 Proxy Authentication Required - 408 Request Timeout - 409 Conflict - 410 Gone - 411 Length Required - 412 Precondition Failed - 413 Payload Too Large - 414 URI Too Long - 415 Unsupported Media Type - 416 Range Not Satisfiable - 417 Expectation Failed - 418 I'm a teapot (RFC 2324) - 421 Misdirected Request (RFC 7540) - 422 Unprocessable Entity (WebDAV) - 423 Locked (WebDAV) - 424 Failed Dependency (WebDAV) - 425 Too Early (RFC 8470) - 426 Upgrade Required - 428 Precondition Required (RFC 6585) - 429 Too Many Requests (RFC 6585) - 431 Request Header Fields Too Large (RFC 6585) - 451 Unavailable For Legal Reasons
- **5xx Server errors** - 500 Internal Server Error - 501 Not Implemented - 502 Bad Gateway - 503 Service Unavailable - 504 Gateway Timeout - 505 HTTP Version Not Supported - 506 Variant Also Negotiates (RFC 2295) - 507 Insufficient Storage (WebDAV) - 508 Loop Detected (WebDAV) - 510 Not Extended (RFC 2774) - 511 Network Authentication Required

{"tags":[{"tag":"textarea","content":"=====================================================================\nInformation [100 - 199]\t\t\t==\t\tSuccess [200 - 299]\n---------------------------------------------------------------------\n100 - Continue\t\t\t\t\t==\t\t200 - Ok\n101 - Switching Protocols\t\t==\t\t201 - Created\n102 - Processing\t\t\t\t==\t\t202 - Accepted\n103 - Early Hints\t\t\t\t==\t\t204 - No Content\n\t\t\t\t\t\t\t\t==\t\t206 - Partial Content\n======================================================================\nRedirect [300 - 399]\t\t\t==\t\tClient Error [400 - 499]\n----------------------------------------------------------------------\n300 - Multiple Choices\t\t\t==\t\t400 - Bad Request\n301 - Moved Permanantly\t\t\t==\t\t401 - Unauthorized\n302 - Found (Previously -\nMoved Temporarily)\t\t\t\t==\t\t402 - Payment Required\n304 - Not Modified\t\t\t\t==\t\t403 - Forbidden\n307 - Temporary Redirect\t\t==\t\t404 - Not Found\n308 - Permanant Redirect\t\t==\t\t409 - Conflict\n======================================================================\n\t\t\t\tServer Error [500 - 599]\n----------------------------------------------------------------------\n\t\t\t\t500 - Internal Server Error\n\t\t\t\t501 - Not Implemented\n\t\t\t\t502 - Bad Gateway\n\t\t\t\t503 - Service Unavailable\n\t\t\t\t504 - Gateway timeout\n=======================================================================","code_language":"whatever"}]}

//Following are HTTP status codes
100 Continue
101 Switching Protocols
103 Early Hints
200 OK
201 Created
202 Accepted
203 Non-Authoritative Information
204 No Content
205 Reset Content
206 Partial Content
300 Multiple Choices
301 Moved Permanently
302 Found
303 See Other
304 Not Modified
307 Temporary Redirect
308 Permanent Redirect
400 Bad Request
401 Unauthorized
402 Payment Required
403 Forbidden
404 Not Found
405 Method Not Allowed
406 Not Acceptable
407 Proxy Authentication Required
408 Request Timeout
409 Conflict
410 Gone
411 Length Required
412 Precondition Failed
413 Payload Too Large
414 URI Too Long
415 Unsupported Media Type
416 Range Not Satisfiable
417 Expectation Failed
418 I'm a teapot
422 Unprocessable Entity
425 Too Early
426 Upgrade Required
428 Precondition Required
429 Too Many Requests
431 Request Header Fields Too Large
451 Unavailable For Legal Reasons
500 Internal Server Error
501 Not Implemented
502 Bad Gateway
503 Service Unavailable
504 Gateway Timeout
505 HTTP Version Not Supported
506 Variant Also Negotiates
507 Insufficient Storage
508 Loop Detected
510 Not Extended
511 Network Authentication Required

200: OK
One of the silent Status Codes/Server Response Codes, this means that the request was received and processed successfully.
301: Moved Permanently
The resource that was requested has been assigned a new permanent URI, and the server should be redirecting you there.
302: Found
The resource that was requested has been assigned a new temporary URI, and the server should be redirecting you there (but for future requests, it will try and use the original location again).
401: Unauthorised
For the request to be successfully processed, user authentication is required. If you’re seeing the 401 status code, this means the header in your request didn’t contain the authorisation codes necessary to view the page content.
403: Forbidden
The request was received and understood, but the server refuses to process it. Even with authorisation, the request would not be successful.
404: Not Found
The server was unable to find anything that matched the requested URI, and it is impossible to tell whether this is temporary or permanent. This is often used either when a server does not want to reveal specifically why a request was refused, or if no other response is applicable.
500: Internal Server Error
An error has occurred in the server itself which prevented it from completing the request. This is a generic, default message that is used when no other codes are applicable. When it comes to WordPress this is similar to the 'error establishing a database connection' message which you can see when the WordPress MySQL database gets tied up.
503: Service Unavailable
The server was unable to handle your HTTP request at the time. This could be due to server crash, server maintenance, server overload, or other reasons. It is generally temporary, and is a code that is normally put up until the whatever the problem was has been fixed.
1×× Informational HTTP status codes
100 Continue
101 Switching Protocols
102 Processing
2×× Success codes HTTP status codes
200 OK
201 Created
202 Accepted
203 Non-authoritative Information
204 No Content
205 Reset Content
206 Partial Content
207 Multi-Status
208 Already Reported
226 IM Used
3×× Redirection HTTP status codes
300 Multiple Choices
301 Moved Permanently
302 Found
303 See Other
304 Not Modified
305 Use Proxy
307 Temporary Redirect
308 Permanent Redirect
4×× Client Error HTTP status codes
400 Bad Request
401 Unauthorized
402 Payment Required
403 Forbidden
404 Not Found
405 Method Not Allowed
406 Not Acceptable
407 Proxy Authentication Required
408 Request Timeout
409 Conflict
410 Gone
411 Length Required
412 Precondition Failed
413 Payload Too Large
414 Request-URI Too Long
415 Unsupported Media Type
416 Requested Range Not Satisfiable
417 Expectation Failed
418 I'm a teapot
421 Misdirected Request
422 Unprocessable Entity
423 Locked
424 Failed Dependency
426 Upgrade Required
428 Precondition Required
429 Too Many Requests
431 Request Header Fields Too Large
444 Connection Closed Without Response
451 Unavailable For Legal Reasons
499 Client Closed Request
5×× Server Error HTTP status codes
500 Internal Server Error
501 Not Implemented
502 Bad Gateway
503 Service Unavailable
504 Gateway Timeout
505 HTTP Version Not Supported
506 Variant Also Negotiates
507 Insufficient Storage
508 Loop Detected
510 Not Extended
511 Network Authentication Required
599 Network Connect Timeout Error

{"tags":[{"tag":"textarea","content":"100s: Informational codes indicating that the request initiated by the browser is continuing.\n200s: Success codes returned when browser request was received, understood, and processed by the server.\n300s: Redirection codes returned when a new resource has been substituted for the requested resource.\n400s: Client error codes indicating that there was a problem with the request.\n500s: Server error codes indicating that the request was accepted, but that an error on the server prevented the fulfillment of the request.","code_language":"whatever"}]}

# Here is a list of common HTTP status codes and their meanings:
# Informational responses
HTTP_100_CONTINUE = 100
HTTP_101_SWITCHING_PROTOCOLS = 101
# Success responses
HTTP_200_OK = 200
HTTP_201_CREATED = 201
HTTP_202_ACCEPTED = 202
HTTP_204_NO_CONTENT = 204
# Redirection messages
HTTP_300_MULTIPLE_CHOICES = 300
HTTP_301_MOVED_PERMANENTLY = 301
HTTP_302_FOUND = 302
HTTP_304_NOT_MODIFIED = 304
HTTP_307_TEMPORARY_REDIRECT = 307
HTTP_308_PERMANENT_REDIRECT = 308
# Client error responses
HTTP_400_BAD_REQUEST = 400
HTTP_401_UNAUTHORIZED = 401
HTTP_403_FORBIDDEN = 403
HTTP_404_NOT_FOUND = 404
HTTP_409_CONFLICT = 409
HTTP_410_GONE = 410
HTTP_429_TOO_MANY_REQUESTS = 429
# Server error responses
HTTP_500_INTERNAL_SERVER_ERROR = 500
HTTP_501_NOT_IMPLEMENTED = 501
HTTP_502_BAD_GATEWAY = 502
HTTP_503_SERVICE_UNAVAILABLE = 503
# You can use these status codes in your code to return appropriate responses to HTTP requests.