HTTP Status Codes

Comprehensive HTTP Status Code Reference Guide - Learn about redirect codes, error codes, and success codes

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417 Expectation Failed (HTTP Status Code 417)
This client error response code indicates that the server cannot fulfill the requirements defined by the `Expect` field in the request header.

418 I’m a teapot (HTTP Status Code 418)
The HTTP status code 418 is a rather amusing and unique code. Originally created as an April Fool's joke, it has found practical use in certain contexts.
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.