RFC 7639 · PROPOSED STANDARD · 2015 MON · 14 SEP 2026

The ALPN HTTP Header Field

By A. Hutton, J. Uberti, M. Thomson · Published August 2015 · DOI 10.17487/RFC7639

Overview

RFC 7639, “The ALPN HTTP Header Field”, is a Proposed Standard document published in August 2015 by A. Hutton, J. Uberti, M. Thomson. The canonical text is published by the RFC Editor.

Abstract

This specification allows HTTP CONNECT requests to indicate what protocol is intended to be used within the tunnel once established, using the ALPN header field.

Abstract as published in the RFC, via rfc-editor.org.

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.

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