What is the key difference between DataForB2B and Mail Index?

DataForB2B 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 DataForB2B 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 DataForB2B and Mail Index free or paid?

DataForB2B operates under a Free / Open Source model (No auth required). Mail Index operates under a Free / Open Source model (No auth required).

Which MCP server has more tools and community activity?

DataForB2B lists 0 tools with 0 views and 0 GitHub stars. Mail Index lists 0 tools with 1 views and 4 GitHub stars.

Can I use both DataForB2B 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.

Side-by-Side Model Context Protocol Comparison

DataForB2B vs Mail Index

In-depth architectural comparison of the DataForB2B 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

DataForB2B

Communication · Local stdio

Quality: 37/100 (Fair) | Auth: No auth required

Mail Index

Communication · Local stdio

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

Verdict Summary: Choose DataForB2B 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 DataForB2B 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 DataForB2B 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	D DataForB2B Communication	Mail Index Communication
Summary	Search and enrich B2B people & companies — 70+ filters, live enrichment, emails, lookalike.	Local-first, read-only MCP server for recall over your Gmail: search, contacts, threads, digests.
Category & Scope	Communication	Communication
Quality signal

Tools & Capabilities Breakdown

DataForB2B Tools (0)

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

Mail Index 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).

DataForB2B Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "dataforb2b": {
      "command": "npx",
      "args": [
        "-y",
        "dataforb2b"
      ]
    }
  }
}

Mail Index Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "mail-index-2": {
      "command": "npx",
      "args": [
        "-y",
        "-p",
        "mail-index",
        "mail-index-mcp"
      ]
    }
  }
}

Frequently Asked Questions

DataForB2B is categorized under Communication and uses a local stdio subprocess. In contrast, Mail Index belongs to Communication using local stdio subprocess. Select DataForB2B when you need capabilities focused on communication and Mail Index when you require tools for communication.

More alternatives to DataForB2B More alternatives to Mail Index Communication category hub