What is the key difference between MailStream and NotFair?

MailStream belongs to the Developer Tools category with cloud HTTP/SSE execution, while NotFair belongs to the Developer Tools category with local stdio execution.

How do I install MailStream or NotFair 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 MailStream and NotFair free or paid?

MailStream operates under a Free / Open Source model (No auth required). NotFair operates under a Free / Open Source model (No auth required).

Which MCP server has more tools and community activity?

MailStream lists 0 tools with 0 views and 0 GitHub stars. NotFair lists 0 tools with 0 views and 3,647 GitHub stars.

Can I use both MailStream and NotFair 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

MailStream vs NotFair

In-depth architectural comparison of the MailStream and NotFair 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

MailStream

Developer Tools · Remote HTTP/SSE

Quality: 42/100 (Fair) | Auth: No auth required

NotFair

Developer Tools · Local stdio

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

Verdict Summary: Choose MailStream if you need specialized Developer Tools tools running via a hosted cloud SSE transport. Choose NotFair if your workspace requires Developer Tools integration with local subprocess execution. Both servers can be configured concurrently in your client's mcpServers manifest.

Which MCP Server Should You Choose?

Choose MailStream when:

You need dedicated capabilities in the Developer Tools domain.
You prefer remote streaming HTTP/SSE transport architecture.
Your security boundary fits: No auth required (Free / Open Source).

Explore MailStream Details

Choose NotFair when:

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

Explore NotFair Details

Feature & Specification Comparison

Specification	M MailStream Developer Tools	NotFair Developer Tools
Summary	The first MCP server for physical mail: send postcards and letters, manage lists and campaigns.	Google Ads MCP - analyze performance, manage keywords, bids, and campaigns.
Category & Scope	Developer Tools	Developer Tools
Quality signal

Tools & Capabilities Breakdown

MailStream Tools (0)

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

NotFair 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).

MailStream Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "mailstream": {
      "url": "https://mailstream.app/developers/mcp-server"
    }
  }
}

NotFair Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "notfair": {
      "command": "npx",
      "args": [
        "-y",
        "notfair@latest"
      ]
    }
  }
}

Frequently Asked Questions

MailStream is categorized under Developer Tools and uses a remote streaming HTTP/SSE transport. In contrast, NotFair belongs to Developer Tools using local stdio subprocess. Select MailStream when you need capabilities focused on developer tools and NotFair when you require tools for developer tools.

More alternatives to MailStream More alternatives to NotFair Developer Tools category hub