5xx Server error responses
510Not Extended
Extension required
#When does this occur?
Returned when further extensions are required to fulfill the request but the server does not support them.
#How to handle?
The server does not support the extension required for the request. Find an alternative or contact the administrator.
#Example
HTTP Response
HTTP/1.1 510 Not Extended
Content-Type: application/json
Date: Tue, 10 Feb 2026 07:18:51 GMT
{
"status": 510,
"message": "Not Extended"
}#Related Status Codes
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