Code 503

Service Unavailable - RFC 7231

Indicates that the server is currently unable to handle the request due to a temporary overload or scheduled maintenance, which will likely be alleviated after some delay. The server MAY send a Retry-After header field to suggest an appropriate amount of time for the client to wait before retrying the request.

sequenceDiagram participant User participant Website User ->> Website: Requests website Website -->> User: Unable to handle the request