What is the key difference between Inbox Zero and ARBuilder?

Inbox Zero belongs to the Communication category with local stdio execution, while ARBuilder belongs to the Communication category with local stdio execution.

How do I install Inbox Zero or ARBuilder 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 ARBuilder free or paid?

Inbox Zero operates under a Freemium model (OAuth 2.0). ARBuilder operates under a Freemium model (API Key required).

Which MCP server has more tools and community activity?

Inbox Zero lists 6 tools with 1 views and 12,211 GitHub stars. ARBuilder lists 19 tools with 2 views and 24 GitHub stars.

Can I use both Inbox Zero and ARBuilder 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 ARBuilder

In-depth architectural comparison of the Inbox Zero and ARBuilder 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

Communication · Local stdio

Quality: 55/100 (Good) | Auth: OAuth 2.0

ARBuilder

Communication · Local stdio

Quality: 56/100 (Good) | Auth: API Key required

Verdict Summary: Choose Inbox Zero if you need specialized Communication tools running via a local process. Choose ARBuilder 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 Inbox Zero when:

You need dedicated capabilities in the Communication 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 ARBuilder when:

You need dedicated capabilities in the Communication domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: API Key required (Freemium).
You have access to required keys: .

Feature & Specification Comparison

Specification	Inbox Zero elie222 Communication	ARBuilder Quantum3-Labs Communication
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.	AI-powered code generator for the Arbitrum ecosystem. 19 MCP tools for Stylus smart contracts, SDK bridging, full-stack dApps, and Orbit chain deployment, backed by RAG-based retrieval over Arbitrum documentation.
Category & Scope

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

ARBuilder Tools (19)

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"
      }
    }
  }
}

ARBuilder Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "quantum3-labs-arbuilder": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-remote"
      ],
      "env": {
        "ARBUILDER_API_KEY": "YOUR_ARBUILDER_API_KEY_HERE"
      }
    }
  }
}

Frequently Asked Questions

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

More alternatives to Inbox Zero More alternatives to ARBuilder Communication category hub