What is the key difference between Inbox Zero and Fort Mail?

Inbox Zero belongs to the Workplace & Productivity category with local stdio execution, while Fort Mail belongs to the Workplace & Productivity category with local stdio execution.

How do I install Inbox Zero or Fort Mail 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 Inbox Zero and Fort Mail free or paid?

Inbox Zero operates under a Freemium model (OAuth 2.0). Fort Mail operates under a Free / Open Source model (No auth required).

Which MCP server has more tools and community activity?

Inbox Zero lists 6 tools with 1 views and 12,345 GitHub stars. Fort Mail lists 0 tools with 0 views and 0 GitHub stars.

Can I use both Inbox Zero and Fort Mail 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

Inbox Zero vs Fort Mail

In-depth architectural comparison of the Inbox Zero and Fort Mail 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

Inbox Zero

Workplace & Productivity · Local stdio

Quality: 60/100 (Good) | Auth: OAuth 2.0

Fort Mail

Workplace & Productivity · Local stdio

Quality: 43/100 (Fair) | Auth: No auth required

Verdict Summary: Choose Inbox Zero if you need specialized Workplace & Productivity tools running via a local process. Choose Fort Mail if your workspace requires Workplace & Productivity integration with local subprocess execution. Both servers can be configured concurrently in your client's mcpServers manifest.

Which MCP Server Should You Choose?

Choose Inbox Zero when:

You need dedicated capabilities in the Workplace & Productivity domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: OAuth 2.0 (Freemium).
You have access to required keys: GOOGLE_CLIENT_ID, GOOGLE_CLIENT_SECRET, MICROSOFT_CLIENT_ID, MICROSOFT_CLIENT_SECRET, GOOGLE_BASE_URL, MICROSOFT_BASE_URL.
Primary tools included: AI personal assistant for inbox organization and reply drafting, Natural language AI rules for custom email handling, Reply Zero tracking for reply and follow-up management.

Explore Inbox Zero Details

Choose Fort Mail when:

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

Feature & Specification Comparison

Specification	Inbox Zero elie222 Workplace & Productivity	F Fort Mail Workplace & Productivity
Summary	An MCP server for Inbox Zero. Adds functionality on top of Gmail like finding out which emails you need to reply to or need to follow up on.	MCP mail for agents — connect Gmail/IMAP and keep human inbox in the loop. From The Fort That Holds LLC. Live catalog: https://thefortthatholds.xyz/catalog.json — Secondhand Decisions $7: https://thefortthatholds.com/secondhand-decisions
Category & Scope	Workplace & Productivity

Tools & Capabilities Breakdown

Inbox Zero Tools (6)

AI personal assistant for inbox organization and reply drafting

Natural language AI rules for custom email handling

Reply Zero tracking for reply and follow-up management

Bulk unsubscriber and archiver tools

Smart filing of attachments to Google Drive or OneDrive

Slack and Telegram integration for chat-based inbox control

Fort Mail Tools (0)

No explicit tool names declared in metadata yet. Check project README on main listing page.

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).

Inbox Zero Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "elie222-inbox-zero": {
      "command": "npx",
      "args": [
        "-y",
        "@inbox-zero/cli"
      ],
      "env": {
        "GOOGLE_CLIENT_ID": "YOUR_GOOGLE_CLIENT_ID_HERE",
        "GOOGLE_CLIENT_SECRET": "YOUR_GOOGLE_CLIENT_SECRET_HERE",
        "MICROSOFT_CLIENT_ID": "YOUR_MICROSOFT_CLIENT_ID_HERE",
        "MICROSOFT_CLIENT_SECRET": "YOUR_MICROSOFT_CLIENT_SECRET_HERE",
        "GOOGLE_BASE_URL": "YOUR_GOOGLE_BASE_URL_HERE",
        "MICROSOFT_BASE_URL": "YOUR_MICROSOFT_BASE_URL_HERE"
      }
    }
  }
}

Fort Mail Configuration

mcpServers (Claude Desktop / Cursor)

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

Frequently Asked Questions

Inbox Zero is categorized under Workplace & Productivity and uses a local stdio subprocess. In contrast, Fort Mail belongs to Workplace & Productivity using local stdio subprocess. Select Inbox Zero when you need capabilities focused on workplace & productivity and Fort Mail when you require tools for workplace & productivity.

More alternatives to Inbox Zero More alternatives to Fort Mail Workplace & Productivity category hub