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

Document Type Expired Internet-Draft (individual)
Last updated 2018-11-15 (latest revision 2018-01-09)
Stream (None)
Intended RFC status Informational
Expired & archived
plain text pdf html bibtex
Stream Stream state (No stream defined)
Consensus Boilerplate Unknown
RFC Editor Note (None)
IESG IESG state Expired
Telechat date
Responsible AD (None)
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


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 Mikul─Śnas (
Daniel Oakley (

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