Mattermost MCP Server: All 19 Tool Operations for AI Agents

This workflow creates a fully functional MCP (Model Context Protocol) server for the Mattermost Tool in n8n, pre-built with all 19 available operations. It serves as an endpoint for AI agents to interact with Mattermost channels, messages, reactions, and users without any manual configuration. Simply import, activate, and copy the webhook URL from the MCP trigger node to connect your AI agents.

Key features include AI expressions using $fromAI() placeholders for automatic parameter population, native n8n Mattermost Tool integration with full error handling, and coverage of all operations: 7 Channel ops (add user, create/delete channel, etc.), 3 Message ops (post/delete/ephemeral), 3 Reaction ops, and 6 User ops (create/deactivate/invite/get users).

Benefits: Saves hours of setup time, enables AI-driven ChatOps for team communication automation, supports e-commerce notifications/fulfillment alerts via Mattermost, and scales for business ops like user management and channel stats. Ideal for automating customer support, internal alerts, or integrating AI bots in collaborative environments.