Here are some sample Response Codes which we will normally see while performing REST API testing over POSTMAN or over any REST API client.
1) 100 Series These are temporary Responses
100 Continue
101 Switching Protocols
102 Processing
2) 200 Series The client accepts the Request, being processed successfully at the server.
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) 300 Series Most of the codes related to this series are for URL Redirection.
300 – Multiple Choices
301 – Moved Permanently
302 – Found
303 – Check Other
304 – Not Modified
305 – Use Proxy
306 – Switch Proxy
307 – Temporary Redirect
308 – Permanent Redirect
4) 400 Series These are specific to client-side error.
400 – Bad Request
401 – Unauthorised
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
426 – Upgrade Required
428 – Precondition Required
429 – Too Many Requests
431 – Request Header Fields Too Large
451 – Unavailable For Legal Reasons
5) 500 Series These are specific to the server-side error.
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
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