🛠️ Mattermost tool MCP server 💪 all 19 operations

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2/3/2026

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Complete MCP server exposing all Mattermost Tool operations to AI agents. Zero configuration needed - all 19 operations pre-built.

⚡ Quick Setup

Import this workflow into your n8n instance
Activate the workflow to start your MCP server
Copy the webhook URL from the MCP trigger node
Connect AI agents using the MCP URL

🔧 How it Works

• MCP Trigger: Serves as your server endpoint for AI agent requests • Tool Nodes: Pre-configured for every Mattermost Tool operation • AI Expressions: Automatically populate parameters via $fromAI() placeholders • Native Integration: Uses official n8n Mattermost Tool tool with full error handling

📋 Available Operations (19 total)

Every possible Mattermost Tool operation is included:

📺 Channel (7 operations)

• Add a user to a channel • Create a channel • Delete a channel • Get a page of members for a channel • Restore a soft-deleted channel • Search for a channel • Get statistics for a channel

💬 Message (3 operations)

• Delete a message • Post a message • Post an ephemeral message

🔧 Reaction (3 operations)

• Create a reaction • Delete a reaction • Get many reactions

👤 User (6 operations)

• Create a user • Deactivate a user • Get a user by email • Get a user by ID • Get many users • Invite a user

🤖 AI Integration

Parameter Handling: AI agents automatically provide values for: • Resource IDs and identifiers • Search queries and filters • Content and data payloads • Configuration options

Response Format: Native Mattermost Tool API responses with full data structure

Error Handling: Built-in n8n error management and retry logic

💡 Usage Examples

Connect this MCP server to any AI agent or workflow:

• Claude Desktop: Add MCP server URL to configuration • Custom AI Apps: Use MCP URL as tool endpoint • Other n8n Workflows: Call MCP tools from any workflow • API Integration: Direct HTTP calls to MCP endpoints

✨ Benefits

• Complete Coverage: Every Mattermost Tool operation available • Zero Setup: No parameter mapping or configuration needed • AI-Ready: Built-in $fromAI() expressions for all parameters • Production Ready: Native n8n error handling and logging • Extensible: Easily modify or add custom logic

> 🆓 Free for community use! Ready to deploy in under 2 minutes.

Mattermost Tool - MCP Server - All 19 Operations

This n8n workflow serves as a Model Context Protocol (MCP) server, designed to act as a central hub for handling various operations related to Mattermost tools. It listens for incoming requests and is intended to dispatch them to specific Mattermost tool operations, although the current JSON only defines the trigger.

What it does

Listens for MCP Requests: The workflow starts with an "MCP Server Trigger" node, which actively listens for incoming requests adhering to the Model Context Protocol. This makes it ready to receive commands or data related to Mattermost tool operations.
Provides a Foundation for Mattermost Tooling: While the current workflow only contains the trigger, its naming and the presence of the MCP Server Trigger indicate its purpose as a foundational component for a broader system that would manage and execute 19 different Mattermost tool operations.

Prerequisites/Requirements

n8n Instance: An active n8n instance to host and run this workflow.
Mattermost Tooling Integration (Planned): While not directly configured in this JSON, the full functionality of this workflow would require integration with Mattermost and the specific tools/operations it intends to manage.

Setup/Usage

Import the workflow: Import the provided JSON file into your n8n instance.
Activate the workflow: Ensure the workflow is activated to start listening for incoming MCP requests.
Extend the workflow: To utilize its full potential, you will need to add more nodes downstream from the "MCP Server Trigger" to handle specific Mattermost tool operations. This would typically involve:
- Conditional Logic: Adding IF nodes to route requests based on the operation specified in the incoming MCP payload.
- Mattermost Nodes: Using n8n's Mattermost nodes to interact with your Mattermost instance (e.g., posting messages, creating channels, managing users).
- Custom Logic: Implementing any specific business logic required for each of the "19 operations."

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