[1] [CITE[How to send a custom http status code? - Kohana Forums]]
([TIME[2017-06-10 16:14:44 +09:00]])
<http://forum.kohanaframework.org/discussion/9478/how-to-send-a-custom-http-status-code/p1>

[2] [CITE[java - Is it possible to return HttpStatus status which is not from HttpStatus enum in Spring MVC - Stack Overflow]]
([TIME[2017-06-10 16:15:08 +09:00]])
<https://stackoverflow.com/questions/42919826/is-it-possible-to-return-httpstatus-status-which-is-not-from-httpstatus-enum-in/42920039>

[3] [CITE@ja[Daniel E. Renferさんのツイート: "The HTTP status code 555 should be reserved for errors related to the server only existing in a movie or tv show."]]
([TIME[2017-06-10 16:12:00 +09:00]])
<https://twitter.com/duck1123/status/228321909824176128>

[4] [CITE@en[Setting the HTTP response status title, "555 - Dropbox had an error" - MuleSoft]]
([TIME[2017-06-10 16:15:37 +09:00]])
<https://forums.mulesoft.com/questions/57701/setting-the-http-response-status-title-555-dropbox.html>

[FIG(quote)[
[FIGCAPTION[
[5] [CITE[Bitbucket API]]
([TIME[2017-06-10 16:16:37 +09:00]])
<https://developer.atlassian.com/bitbucket/api/2/reference/resource/repositories/%7Busername%7D/%7Brepo_slug%7D/patch/%7Bspec%7D>
]FIGCAPTION]

> 555	
> If the diff was too large and timed out.
> Since this endpoint does not employ any form of pagination, but instead returns the diff as a single document, it can run into trouble on very large diffs. If Bitbucket times out in cases like these, a 555 status code is returned.

]FIG]