Slack

This is a Membrane-powered Slack integration that handles the auth headaches for you so Claude can read channels, post messages, search conversations, and manage users without you fumbling with OAuth tokens. It works through the Membrane CLI, which means you set up a connection once and the credential refresh happens automatically in the background. The action discovery is smart: you can search by intent instead of memorizing endpoint names. If the pre-built actions don't cover your case, there's a proxy mode that lets you hit any Slack API endpoint directly while Membrane still handles the auth headers. Free tier supported, which is rare enough to mention.