Slack MCP server
Quick answer
The Slack MCP server lets Claude search your workspace, read channels and threads, and post messages. We use it every day since July 2026, mostly to read: find what was decided, read a client channel before acting. Writing is where it needs a rule, because a message sent through it goes out in your name.
- Published by
- Official (Slack)
- How it runs
- Hosted, sign in with OAuth
- Get it
- docs.slack.dev/ai/slack-mcp-server
What your assistant can do with it
- Search messages and files across the channels you can see
- Read a channel, a thread or a direct message history
- Send a message or a reply in a thread
- Write a draft for you to review
- Read user profiles and channel members
How to connect it
- Add the Slack connector in Claude and sign in with OAuth for your workspace.
- Test with a search on a recent topic.
- Decide who may send from Claude, and when, before anyone does.
How we use it
Claude reads our client channels and direct messages before it acts, so decisions taken in Slack reach the work without anyone repeating them. It also sends: a reply to a teammate, a message we asked for. Automated summaries go through a separate bot instead.
Where it breaks
- A message sent through it goes out under your own name, and you get no notification of your own post. Our rule: Claude never sends without an explicit OK on that exact message.
- Automated messages, like a daily summary or an alert, should come from a bot, so people can tell them apart from you.
- What Claude can read is what your account can read: private channels you are not in stay out.
Our take. Connect it for reading: it is the fastest way for Claude to know what the team already decided. Allow sending one message at a time, with your OK.
Frequently asked questions
Is the Slack MCP server official?
Yes. Slack publishes a hosted MCP server that AI clients connect to with OAuth.
Can Claude post in Slack as a bot?
Not through this server: it acts as the user who connected it. Use a Slack app or bot for automated posts.
Can it read private channels?
Only the ones your own account can read.
More servers we run: MCP servers for GTM.
Want this wired into your stack
We build and run GTM systems where Claude works across your CRM, data and sending tools, with rules it has to follow.
Book a GTM audit