451 unavailable for legal reasons
431 request header fields too large
428 precondition required
426 upgrade required
425 too early
424 failed dependency
423 locked
422 unprocessable content
421 misdirected request
418 i'm a teapot
416 ranger not satisfiable
413 content too large
411 length required
410 gone
409 conflict
404 not found
402 payment required
401 unauthorized
400 bad request
429 too many requests
405 method not allowed
4 xx client error responses
415 unsupported media type