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421

Misdirected Request

Client Error
RFC 7540

The request was directed at a server that is not able to produce a response.

Detailed Information

The 421 status code indicates that the request was directed at a server that is not able to produce a response.

Common Examples

  • API requests with invalid Host headers
  • Web page requests with invalid Host headers

Common Uses

  • API requests with invalid Host headers
  • Web page requests with invalid Host headers

Best Practices

  • Use when the request Host header is invalid
  • Include a detailed error message
  • Ensure proper Host header validation

Quick Actions

Category Information

Client Error

The request contains bad syntax or cannot be fulfilled

Related Status Codes

3 similar
400

Bad Request

The server cannot or will not process the request due to something that is perceived to be a client error.

401

Unauthorized

The request requires user authentication.

402

Payment Required

Reserved for future use.

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HTTP Status Codes Reference - Complete List with Descriptions