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Generic HTTP Error Response Codes

The following table lists the codes used for generic HTTP error responses:
Code Description
100 Continue
101 Switching Protocols
200 OK
200 CORS origin denied
200 Unsupported HTTP request header
200 Invalid preflight CORS request: Missing Access-Control-Request-Method header
201 Created
202 Accepted
203 Non-Authoritative Info
204 No Content
205 Reset Content
206 Partial Content
207 Multi-Status
300 Multiple Choices
301 Moved Permanently
302 Found
303 See Other
304 Not Modified
305 Use Proxy
307 Temporary Redirect
400 BAD REQUEST
400 Unsupported OAuth Version
401 Developer Inactive
401 Unauthorized
402 Payment Required
403 Forbidden
403 Timestamp is Invalid
403 Service Requires SSL
403 Invalid API Key CID pair
403 Invalid API Plan
403 CORS origin denied
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 Request Entity Too Large
414 Request URI Too Large
415 Unsupported Media Type
416 Requested Range Not Satisfiable
417 Expectation Failed
419 Authentication Timeout
420 Method Failure
422 Unprocessable Entity
423 Locked
424 Failed Dependency
429 Too Many Requests
450 Blocked by Windows Parental Controls
451 Redirect
500 Internal Server Error
501 Not Implemented
502 Bad Gateway
503 Service Unavailable
504 Gateway Timeout
505 HTTP Version Not Supported
510 Not Extended
596 Invalid preflight CORS request: Missing Origin header or Request's Http Method is not OPTIONS

For a list of default error set messages, see the Error Messages section of API Definition Error Sets.