Mattermost

Mattermost is an open-source, self-hosted team collaboration platform similar to Slack. It's used by organizations, especially those with strict security or compliance requirements, for internal communication and project management.

Official docs: https://developers.mattermost.com/

Mattermost Overview

• Channel
  • Post
• User

Use action names and parameters as needed.

Working with Mattermost

This skill uses the Membrane CLI to interact with Mattermost. Membrane handles authentication and credentials refresh automatically — so you can focus on the integration logic rather than auth plumbing.

Install the CLI