How do I connect Mattermost?

Add the Mattermost piece to a flow, then authenticate with Custom auth. Once connected, its 0 triggers and 2 actions are available anywhere in the builder.

What can I automate with Mattermost?

Connect Mattermost to any of 760+ other apps and AI steps, then automate the work in between without writing code.

Can I self-host the Mattermost integration?

Yes. Activepieces is fully self-hostable, so you can run the Mattermost piece on your own infrastructure with your connections and your data staying in your environment.

Can my AI agent use Mattermost as a tool?

Yes. Every piece you connect can be exposed over one Activepieces MCP server, so Claude, Cursor, Windsurf or any MCP client can call Mattermost actions as tools.

Mattermost integration

Open-source, self-hosted Slack alternative

Start building Use Mattermost with your AI

Actions: 2
Triggers: 0
Auth: Custom auth
License: MIT, open source
Updated: September 2026

About the Mattermost integration

Add the Mattermost piece to a flow, connect your account once, and the rest of the builder can read from it and write to it. Because the piece is open source you can run it on our cloud or self-host it, and combine Mattermost with 760+ other apps in the same flow.

Actions

Everything Activepieces can do in Mattermost

Drop any of these into a flow and fill in the fields. No code is required.

Send Message
Send a message to a Mattermost channel
2 fields
Custom API Call
Make a custom API call to a specific endpoint
10 fields

Use Mattermost in a flow

Connect Mattermost once and every trigger and action above is yours to drop into the builder, alongside 760+ other apps. Free to start, on our cloud or your own servers.

Build a Mattermost flow Talk to sales

Mattermost, answered.

Yes. Activepieces is open source and free to start, and the Mattermost piece is included on every plan, from the free cloud tier to any self-hosted deployment.