InspIRCd v4 is still early in development!

If you use this branch you may experience crashes, weird behaviour, and unannounced breaking changes.

You probably want to use InspIRCd v3 instead.

The "cap" Module (v4)


This module provides support for the IRCv3 Client Capability Negotiation extension.

This is used by clients to allow the use of modern IRC features without breaking compatibility with older clients.


To load this module use the following <module> tag:

<module name="cap">

This module requires no other configuration.


Name Parameter Count Syntax Description
LS [<version>]
REQ :[-]<cap>[ [-]<cap>]+
Allows clients to enable capabilities, disable capabilities, and view the capabilities they have enabled.

Client Capabilities

Name Description Rejects any attempt to request it to avoid clients requesting all available capabilities rather than the ones they support.

Special Notes

The /CAP command should generally not be executed by users. It is intended to be an entirely internal feature which is executed automatically by clients. Adding and removing capabilities manually may break your client.