428 Precondition Required
Say 'only if' or I'm not doing it.
What it properly means
The server requires the request to be conditional, to prevent lost updates where two clients overwrite each other.
- Class
- 4xx Client error: you fucked up
- Defined in
- RFC 6585
Get one yourself
This endpoint really answers with 428. Point your client at it and see what it does.
curl -i https://httpcodes.dev/api/428