Client Hint Reliability

Document Type Expired Internet-Draft (individual)
Author David Benjamin 
Last updated 2021-12-03 (latest revision 2021-06-01)
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This document defines the Critical-CH HTTP response header, and the ACCEPT_CH HTTP/2 and HTTP/3 frames to allow HTTP servers to reliably specify their Client Hint preferences, with minimal performance overhead. Discussion Venues This note is to be removed before publishing as an RFC. Source for this draft and an issue tracker can be found at


David Benjamin (

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