MCP server · Productivity

Mattermost MCP server

Lets your AI read channels, post messages, reply in threads and add reactions in Mattermost for you.

This is a small helper that connects your AI assistant to Mattermost, the chat app your team uses. Once it is set up, you can ask your AI to find messages, post updates, or reply in a thread, and it does that in Mattermost for you. It is handy if you spend a lot of your day in Mattermost and want to stop switching windows and copy-pasting.

What is an MCP server? The 30-second version

On its own, your AI can only chat with you. It cannot see your Mattermost channels or write anything there. An MCP server is a small helper program that gives your AI a new skill, and this one gives it a connection to your Mattermost workspace. So when you ask your AI about a channel or want it to post something, it uses this helper to talk to Mattermost and brings the result back to you.

What this MCP server does

You ask your AI something about Mattermost, like what was said in a channel or to post a message. The AI passes your request to this helper. The helper signs in to your Mattermost workspace and does the action there, like reading messages, posting a reply, or adding an emoji reaction. Then it sends the result back to the AI, and the AI explains it to you in the chat. You never have to open Mattermost yourself for that task.

Flow diagram: you ask your AI “What was said in town-square today?”, the Mattermost MCP server connects it to Mattermost, and you get back answers in your AI chat.

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What you can do with it

List the channels in your Mattermost workspace, including private ones and direct messages if you want
Read the messages in a channel, or only the ones from a certain date range
Post a new message to a channel
Reply to a specific thread
Add an emoji reaction to a message
Get all the replies in a thread
Edit the text of a message you wrote
Keep an eye on chosen topics in chosen channels on a schedule

Try asking your AI

“What are the latest messages in the town-square channel?”
“Post a message in the team-updates channel saying the report is ready”
“Reply to the last message in the project-x thread with thanks, I will check tomorrow”
“Add a thumbs up reaction to the message about the new release”
“Show me everything said in the marketing channel since Monday”

What it gives back to you

You get answers in the chat, written out in normal words. For example, a list of channel names, a summary of recent messages, or the text of a thread. When it posts or edits something, it tells you what it did and shows the message text. If a message has files attached, it also tells you the file names and sizes.

Before you start

What you need

A Mattermost account on a workspace you can access
The web address of your Mattermost server (it ends with /api/v4)
Your team ID in Mattermost
Either a personal access token from Mattermost, or you can sign in through a browser window when asked

Good to know

It can post and edit messages in your name, so check what your AI is about to send before you let it, and remember it can read private channels and direct messages if you turn that on.

Install it with your AI

Add Mattermost MCP server to your AI, no technical skills needed

You don't install anything by hand. You copy one prompt, paste it into an AI that can work on your computer, and it checks, installs and connects the server for you, asking you when it needs something.

Sign in to get the install prompt

Members get a ready-made prompt that lets the Claude desktop app check Mattermost MCP server, install it and connect it for them, step by step. You don't need any technical skills: you copy, paste and answer a few questions. Your connected AI can also find and install any of the 4,066 MCP servers here for you.