Teamspeak

ts3.agentclan.com:9993 (or ts12.shrapnet.com:9993)
(ask another Agent for the password)

IRC

webchat.agentclan.com (or webchat.quakenet.org)
#agentclan

Slack

slack.agentclan.com (or secretagentclan.slack.com)

Secret Agent Clan