The Deprecation HTTP Response Header Field
RFC 9745, “The Deprecation HTTP Response Header Field”, is a Proposed Standard document published in March 2025 by S. Dalal, E. Wilde. The canonical text is published by the RFC Editor.
Abstract
The Deprecation HTTP response header field is used to signal to consumers of a resource (identified by a URI) that the resource will be or has been deprecated. Additionally, the deprecation link relation can be used to link to a resource that provides further information about planned or existing deprecation. It may also provide ways in which client application developers can best manage deprecation.
What “Proposed Standard” means
An entry-level standards-track specification: stable, peer-reviewed and a solid basis for implementation, though it may still evolve before becoming an Internet Standard.
The canonical text of RFC 9745 is hosted at rfc-editor.org. Available in HTML,TXT,PDF,XML.
- RFC 9744 EVPN Virtual Private Wire Service Flexible Cross-Connect Service
- RFC 9746 BGP EVPN Multihoming Extensions for Split-Horizon Filtering
- RFC 9743 Specifying New Congestion Control Algorithms
- RFC 9747 Unaffiliated Bidirectional Forwarding Detection Echo
- RFC 9742 A YANG Data Model for Syslog Management
- RFC 9748 Updating the NTP Registries
- RFC 9741 Concise Data Definition Language : Additional Control Operators for the Conversion and Processing of Text
- RFC 9749 Use of Voluntary Application Server Identification in JSON Meta Application Protocol Web Push