What is the key difference between Proof Inbox and Thunderbird Cli?

Proof Inbox belongs to the Communication category with local stdio execution, while Thunderbird Cli belongs to the Communication category with local stdio execution.

How do I install Proof Inbox or Thunderbird Cli 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 Proof Inbox and Thunderbird Cli free or paid?

Proof Inbox operates under a Free / Open Source model (No auth required). Thunderbird Cli operates under a Free / Open Source model (No auth required).

Which MCP server has more tools and community activity?

Proof Inbox lists 3 tools with 0 views and 0 GitHub stars. Thunderbird Cli lists 0 tools with 0 views and 41 GitHub stars.

Can I use both Proof Inbox and Thunderbird Cli 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

Proof Inbox vs Thunderbird Cli

In-depth architectural comparison of the Proof Inbox and Thunderbird Cli 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

Proof Inbox

Communication · Local stdio

Quality: 44/100 (Fair) | Auth: No auth required

Thunderbird Cli

Communication · Local stdio

Quality: 45/100 (Fair) | Auth: No auth required

Verdict Summary: Choose Proof Inbox if you need specialized Communication tools running via a local process. Choose Thunderbird Cli 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 Proof Inbox 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).
Primary tools included: balance, verify_email, receipts.

Explore Proof Inbox Details

Choose Thunderbird Cli 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 Thunderbird Cli Details

Feature & Specification Comparison

Specification	P Proof Inbox Communication	T Thunderbird Cli Communication
Summary	Prepaid email-verify credits for MCP agents via Stripe Link.	Give AI agents full read/write email access via Mozilla Thunderbird. Zero credentials.
Category & Scope	Communication	Communication
Quality signal

Tools & Capabilities Breakdown

Proof Inbox Tools (3)

balance

tank check. Costs 0.

verify_email

fresh check costs 1. Cache (30 days), syntax, and vendor `unknown` cost 0.

receipts

checkout session id. Do not invent it.

Thunderbird Cli 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).

Proof Inbox Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "proof-inbox-2": {
      "command": "npx",
      "args": [
        "-y",
        "proof-inbox-2"
      ]
    }
  }
}

Thunderbird Cli Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "thunderbird-cli": {
      "command": "npx",
      "args": [
        "-y",
        "thunderbird-cli-mcp"
      ]
    }
  }
}

Frequently Asked Questions

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

More alternatives to Proof Inbox More alternatives to Thunderbird Cli Communication category hub