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412

Precondition Failed

Client Error
RFC 7232

The server does not meet one of the preconditions that the requester put on the request.

Detailed Information

The 412 status code indicates that the server does not meet one of the preconditions that the requester put on the request.

Common Examples

  • API requests with missing If-Match header
  • Form submissions with missing If-Unmodified-Since header

Common Uses

  • API requests with missing If-Match header
  • Form submissions with missing If-Unmodified-Since header

Best Practices

  • Use when the request preconditions are not met
  • Include appropriate precondition headers
  • Ensure proper resource versioning and conflict resolution mechanisms are in place

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