What is the key difference between Inbox Zero and Solmail MCP?

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

How do I install Inbox Zero or Solmail 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 Inbox Zero and Solmail MCP free or paid?

Inbox Zero operates under a Freemium model (OAuth 2.0). Solmail MCP operates under a Free / Open Source 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. Solmail MCP lists 4 tools with 2 views and 1 GitHub stars.

Can I use both Inbox Zero and Solmail 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

Inbox Zero vs Solmail MCP

In-depth architectural comparison of the Inbox Zero and Solmail 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

Inbox Zero

Communication · Local stdio

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

Solmail MCP

Communication · Local stdio

Quality: 55/100 (Good) | Auth: API Key required

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

Feature & Specification Comparison

Specification	Inbox Zero elie222 Communication	Solmail MCP ExpertVagabond 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.	Send physical mail with Solana payments — AI agents can compose, price, and send letters and postcards via cryptocurrency.
Category & Scope	Communication

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

Solmail MCP Tools (4)

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"
      }
    }
  }
}

Solmail MCP Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "expertvagabond-solmail-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "solmail-mcp@latest"
      ],
      "env": {
        "SOLANA_PRIVATE_KEY": "YOUR_SOLANA_PRIVATE_KEY_HERE",
        "SOLANA_NETWORK": "YOUR_SOLANA_NETWORK_HERE",
        "SOLMAIL_API_URL": "YOUR_SOLMAIL_API_URL_HERE",
        "MERCHANT_WALLET": "YOUR_MERCHANT_WALLET_HERE"
      }
    }
  }
}

Frequently Asked Questions

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

More alternatives to Inbox Zero More alternatives to Solmail MCP Communication category hub