What is the key difference between Slack Mcp Server and Mail Index?

Slack Mcp Server belongs to the Communication category with local stdio execution, while Mail Index belongs to the Communication category with local stdio execution.

How do I install Slack Mcp Server or Mail Index 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 Mail Index free or paid?

Slack Mcp Server operates under a Free / Open Source model (other). Mail Index operates under a Free / Open Source model (No auth required).

Which MCP server has more tools and community activity?

Slack Mcp Server lists 21 tools with 3 views and 29 GitHub stars. Mail Index lists 0 tools with 0 views and 0 GitHub stars.

Can I use both Slack Mcp Server and Mail Index 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.

How do I install Slack Mcp Server or Mail Index in Claude Desktop, Cursor, or Windsurf?

Both servers follow the standard Model Context Protocol configuration format. Simply copy the JSON block from the configuration section above and paste it into your AI client's mcpServers configuration object (for instance in claude_desktop_config.json or ~/.cursor/mcp.json ), then completely restart or refresh the application.

Are Slack Mcp Server and Mail Index free to use, or do they require API keys?

Slack Mcp Server is listed under a Free / Open Source model with other . Mail Index operates under a Free / Open Source model with No auth required . If environment variables are required (such as API keys), be sure to define them under the env key in your MCP client's configuration file.

Can I run both Slack Mcp Server and Mail Index at the same time in my AI client?

Yes! MCP clients support multi-server orchestration. You can include both jtalk22-slack-mcp-server and mail-index as distinct keys inside the single mcpServers object in your configuration file. Your AI assistant will automatically select and call the appropriate tool from either server during chat sessions.

Which MCP server has higher directory engagement and quality ratings?

On AllMCPs, Slack Mcp Server has a Quality Score of 64 /100 ( Good ) with 3 views, 0 installs, and 29 GitHub stars. Mail Index holds a Quality Score of 27 /100 ( Emerging ) with 0 views, 0 installs, and 0 GitHub stars.

Side-by-Side Model Context Protocol Comparison

Slack Mcp Server vs Mail Index

In-depth architectural comparison of the Slack Mcp Server and Mail Index 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

Mail Index

Communication · Local stdio

Quality: 27/100 (Emerging) | Auth: No auth required

Verdict Summary: Choose Slack Mcp Server if you need specialized Communication tools running via a local process. Choose Mail Index 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 (Free / Open Source).
You have access to required keys: SLACK_MCP_PROFILE, SLACK_MCP_STORAGE_BACKEND, SLACK_MCP_KEYCHAIN_REFRESH_INTERVAL, SLACK_MCP_TOKEN_FILE_PATH.
Primary tools included: slack_token_status, slack_health_check, slack_refresh_tokens.

Explore Slack Mcp Server Details

Choose Mail Index when:

You need dedicated capabilities in the Communication domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: No auth required (Free / Open Source).

Explore Mail Index Details

Feature & Specification Comparison

Specification	Slack Mcp Server jtalk22 Communication	M Mail Index 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.	Local-first, read-only MCP server for recall over your Gmail: search, contacts, threads, digests.
Category & Scope	Communication

Tools & Capabilities Breakdown

Slack Mcp Server Tools (21)

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"
      ],
      "env": {
        "SLACK_MCP_PROFILE": "YOUR_SLACK_MCP_PROFILE_HERE",
        "SLACK_MCP_STORAGE_BACKEND": "YOUR_SLACK_MCP_STORAGE_BACKEND_HERE",
        "SLACK_MCP_KEYCHAIN_REFRESH_INTERVAL": "YOUR_SLACK_MCP_KEYCHAIN_REFRESH_INTERVAL_HERE",
        "SLACK_MCP_TOKEN_FILE_PATH": "YOUR_SLACK_MCP_TOKEN_FILE_PATH_HERE"
      }
    }
  }
}

Mail Index Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "mail-index": {
      "command": "npx",
      "args": [
        "-y",
        "mail-index"
      ]
    }
  }
}

Frequently Asked Questions

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

More alternatives to Slack Mcp Server More alternatives to Mail Index Communication category hub