Skip to main content

Hypertext Transfer Protocol (HTTP/1.1): Activity Identifiers

Document Type Expired Internet-Draft (individual)
Author Scott Perham
Last updated 2019-11-24 (Latest revision 2019-05-23)
Stream (None)
Intended RFC status (None)
Expired & archived
Stream Stream state (No stream defined)
Consensus boilerplate Unknown
RFC Editor Note (None)
IESG IESG state Expired
Telechat date (None)
Responsible AD (None)
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:


It is very common that implementers of HTTP severs require the ability to associate an identifier to an HTTP request and or response, this can be for a number of reasons which could include checking for duplicate requests, allowing the caller of an API to maintain a record of their interaction with the server or to track client/server requests through a disparate system of services. In any case, the implementer will quite often use a custom HTTP header and either assign a value itself or require the caller to supply the value. This document outlines a consistent storage mechanism for this identifier by way of a standard HTTP header and a new status code for when a mandated identifier is omitted. The purpose is to create better consistency for clients of third-party HTTP servers and HTTP based APIs by introducing this standard request and response header.


Scott Perham

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