HTTP Status Codes For API Testing

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Rest API Response Codes

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 – 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
  • 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

Apart from this, there are several different codes that exist but those will deviate us from our current discussion.