What is the HTTP status code to return when input data is missing?
Is it appropriate to use HTTP status codes for non-HTTP errors?
Rest API batch response status
What StatusCode should I return to parameters out of range
Code when you can't add a comment to a page due to comments closed?
Is there a server that implements http status code 418?
HTTP Status Code for Ambiguous Request
Google Merchant Orders - 414 Error, URL too long to process
What's the deal with HTTP status code 308?
HTTP POST 400 error
Does a server have to carry out an operation before redirection?
Checking success of http status
Faking a 404, 500 and
What does a proper etag response look like?
Are HTTP status codes considered “magic numbers”?
Proper HTTP status to return for hacking attempts