HTTP Status Codes

HTTP Status Code Reference Guide

• 421 Misdirected Request (HTTP Status Code 421)

  The HTTP status code 421 indicates a "Misdirected Request." This is a relatively new status code introduced in the HTTP/2 specification.

• 422 Unprocessable Entity WebDAV (HTTP Status Code 422)

  The HTTP status code 422 represents "Unprocessable Entity." This status code was initially defined in the WebDAV (Web Distributed Authoring and Versioning) extension but is now widely used in many other HTTP applications.

• 423 Locked (WebDAV; HTTP Status Code 423)

  HTTP status code 423 means "Locked." This status code was originally defined in the WebDAV (Web Distributed Authoring and Versioning) protocol to handle concurrency issues in distributed file systems.

• 424 Failed Dependency WebDAV (HTTP Status Code 424)

  HTTP status code 424 means "Failed Dependency." This status code was first introduced in the WebDAV (Web Distributed Authoring and Versioning) protocol.

• 425 Too Early (HTTP Status Code 425)

  HTTP Status Code 425 means "Too Early," and it is a relatively new status code officially added to the HTTP specification in 2019. This status code is primarily used to handle specific situations related to TLS (Transport Layer Security) 1.3 early data (also known as 0-RTT data).

• 426 Upgrade Required (HTTP Status Code 426)

  HTTP status code 426 "Upgrade Required" is a standard client error response code.