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Internet Relay Chat: Client-to-Client Protocol (CTCP)

Document Type Expired Internet-Draft (individual)
Expired & archived
Authors Mantas Mikulėnas , Daniel Oakley
Last updated 2018-11-15 (Latest revision 2018-01-09)
RFC stream (None)
Intended RFC status Informational
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This Internet-Draft is no longer active.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:


This document describes the Client-to-Client Protocol (CTCP), which lets Internet Relay Chat (IRC) clients send each other messages that get displayed or responded to in special ways. CTCP has been widely implemented, with most clients supporting it natively. This document outlines how to implement CTCP and the most common messages used. It updates RFC 1459 and RFC 2812.


Mantas Mikulėnas
Daniel Oakley

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