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OAuth 2.0 Web Message Response Mode

Document Type Expired Internet-Draft (individual)
Expired & archived
Authors Toru Yamaguchi , Nat Sakimura , Nov Matake
Last updated 2024-05-11 (Latest revision 2023-11-08)
RFC stream (None)
Intended RFC status (None)
Stream Stream state (No stream defined)
Consensus boilerplate Unknown
RFC Editor Note (None)
IESG IESG state Expired
Telechat date (None)
Responsible AD (None)
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:


This specification defines a new response mode for RFC6749 that uses HTML5 Web Messaging (a.k.a window.postMessage()) instead of the redirect for the Authorization Response from the Authorization Endpoint. It defines two modes: simple mode and relay mode. Relay mode can be used to protect the access token in the implicit grant case by confining it within the origins of authorization server or resource server and preventing it from being read by the client.


Toru Yamaguchi
Nat Sakimura
Nov Matake

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)