200 Success - Request completed.
201 Success - New resource created.
202 Success - The request has been accepted, but not yet processed.
204 Success - No content to return.
400 Bad Request - The request could not be parsed, generally due to bad syntax.
401 Unauthorized - The request could not be authenticated due to missing or invalid credentials.
403 Forbidden - You do not have permission to access to the resource.
404 Not Found - The resource doesn't exist.
409 Conflict - The with state of the resource on server. Can occur with (too rapid) PUT requests.
429 The request was not accepted because the application has exceeded the rate limit.
500 Internal Server Error - An internal error occurred in Signifyd.
503 Service Unavailable - The server is currently unavailable. Check the status page for reported outages.
504 Gateway Timeout - The request could not complete in time.