Allows sites to send HTTP request/response pairs (exchanges) that are authoritative for an origin, even when the server itself is not authoritative for that origin. This is part of Web Packaging, which will allow people to share web applications peer-to-peer, while offline, with proof that an app comes from its original author. This also shares some infrastructure with signature-based SRI.



Specification link

Specification being incubated in a Community Group

Status in Chromium


Enabled by default (tracking bug)

Consensus & Standardization

After a feature ships in Chrome, the values listed here are not guaranteed to be up to date.


Search tags

package, packaging, response,

Last updated on 2021-12-13