What is the key difference between Slack MCP Server and Mattermost MCP?

Slack MCP Server belongs to the Communication category with local stdio execution, while Mattermost MCP belongs to the Communication category with local stdio execution.

How do I install Slack MCP Server or Mattermost MCP in Claude Desktop or Cursor?

Copy the mcpServers JSON configuration snippet provided on this page into your claude_desktop_config.json or ~/.cursor/mcp.json file and restart your AI client.

Are Slack MCP Server and Mattermost MCP free or paid?

Slack MCP Server operates under a Freemium model (other). Mattermost MCP operates under a Free / Open Source model (API Key required).

Which MCP server has more tools and community activity?

Slack MCP Server lists 19 tools with 6 views and 30 GitHub stars. Mattermost MCP lists 5 tools with 4 views and 3 GitHub stars.

Can I use both Slack MCP Server and Mattermost MCP together in the same MCP host?

Yes! MCP hosts like Claude Desktop, Cursor, Windsurf, Cline, and VS Code support configuring multiple servers under the mcpServers object simultaneously.

Side-by-Side Model Context Protocol Comparison

Slack MCP Server vs Mattermost MCP

In-depth architectural comparison of the Slack MCP Server and Mattermost MCP MCP servers. Compare execution transports, security boundaries, tool capabilities, quality scores, and ready-to-paste client installation snippets for Claude, Cursor, Windsurf, and VS Code.

At a Glance & Executive Verdict

Slack MCP Server

Communication · Local stdio

Quality: 64/100 (Good) | Auth: other

Mattermost MCP

Communication · Local stdio

Quality: 51/100 (Good) | Auth: API Key required

Verdict Summary: Choose Slack MCP Server if you need specialized Communication tools running via a local process. Choose Mattermost MCP if your workspace requires Communication integration with local subprocess execution. Both servers can be configured concurrently in your client's mcpServers manifest.

Which MCP Server Should You Choose?

Choose Slack MCP Server when:

You need dedicated capabilities in the Communication domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: other (Freemium).
Primary tools included: slack_token_status, slack_health_check, slack_refresh_tokens.

Explore Slack MCP Server Details

Choose Mattermost MCP when:

You need dedicated capabilities in the Communication domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: API Key required (Free / Open Source).
You have access to required keys: MATTERMOST_URL, MATTERMOST_TOKEN, MATTERMOST_TEAM_ID.
Primary tools included: Mattermost channel listing and history retrieval, Message posting and threaded replies, Message reactions and thread inspection.

Feature & Specification Comparison

Specification	Slack MCP Server jtalk22 Communication	Mattermost MCP conarti Communication
Summary	Your complete Slack context for Claude—DMs, channels, threads, search. No OAuth apps, no admin approval. --setup and done, 11 tools, auto-refresh.	MCP server for Mattermost API. List channels, read/post messages, manage threads and reactions, monitor topics. Supports flexible configuration via CLI args, environment variables, or config files.
Category & Scope

Tools & Capabilities Breakdown

Slack MCP Server Tools (19)

slack_token_status

Check token health, age, auto-refresh status, and cache stats

slack_health_check

Check if Slack tokens are valid and show authentication status

slack_refresh_tokens

Force refresh tokens by extracting from Chrome (requires Slack tab open in Chrome)

slack_list_conversations

List all DMs and channels with user names resolved. Uses cached DMs by default for speed.

slack_conversations_history

Get messages from a channel or DM with user names resolved

slack_get_full_conversation

Ready-to-Paste Client Configurations

Paste either (or both) of these JSON server blocks into your client config file (e.g. claude_desktop_config.json or ~/.cursor/mcp.json).

Slack MCP Server Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "jtalk22-slack-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@jtalk22/slack-mcp"
      ]
    }
  }
}

Mattermost MCP Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "conarti-mattermost-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@conarti/mattermost-mcp"
      ],
      "env": {
        "MATTERMOST_URL": "YOUR_MATTERMOST_URL_HERE",
        "MATTERMOST_TOKEN": "YOUR_MATTERMOST_TOKEN_HERE",
        "MATTERMOST_TEAM_ID": "YOUR_MATTERMOST_TEAM_ID_HERE"
      }
    }
  }
}

Frequently Asked Questions

Slack MCP Server is categorized under Communication and uses a local stdio subprocess. In contrast, Mattermost MCP belongs to Communication using local stdio subprocess. Select Slack MCP Server when you need capabilities focused on communication and Mattermost MCP when you require tools for communication.

More alternatives to Slack MCP Server More alternatives to Mattermost MCP Communication category hub Canonical compare URL