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# HTTP Return Codes

Any HTTP return code defined by the HTTP standard may be returned. The most commonly used HTTP status codes in this API are :

Code | Cause
--- | ---
200 | OK
201 | Created
204 | No Content
400 | Bad Request - Syntax or format error
401 | Unauthenticated request
500 | Internal Server Error
503 | Service Unavailable

## See Also

Network Working Group RFC 2616: Hypertext Transfer Protocol -- HTTP/1.1
Network Working Group RFC 2616 Section 10: Status Code Definitions