5xx Server error responses

503Service Unavailable

Service unavailable

#When does this occur?

Returned when the server is temporarily unable to handle requests. (e.g., server overload, maintenance mode, resource exhaustion)

#How to handle?

Server is temporarily unavailable. If a Retry-After header is present, try again after that time.

#Example

HTTP Response

HTTP/1.1 503 Service Unavailable
Content-Type: application/json
Date: Tue, 10 Feb 2026 07:17:50 GMT

{
  "status": 503,
  "message": "Service Unavailable"
}

#Related Status Codes

500Internal Server Error 501Not Implemented 502Bad Gateway 504Gateway Timeout 505HTTP Version Not Supported

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