Accept-CH header is set by the server to specify
which Client Hints headers a client
should include in subsequent requests.
|Header type||Response header|
|Forbidden header name||?|
Note: Client Hints are accessible only on secure origins (via TLS). Accept-CH and Accept-CH-Lifetime headers should be persisted for all secure requests to ensure Client Hints are sent reliably.
Accept-CH: <list of client hints>
Accept-CH: Viewport-Width Accept-CH: Width Accept-CH-Lifetime: 86400 Vary: Viewport-Width, Width
Note: Remember to vary the response based on the accepted client hints.
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The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.