Abnormal Security MCP vs Courier

In-depth architectural comparison of the Abnormal Security MCP and Courier 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.

Which MCP Server Should You Choose?

Choose Abnormal Security MCP 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 Abnormal Security MCP Details

Choose Courier 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 Courier Details

Feature & Specification Comparison

Specification	Abnormal Security MCP Communication	Courier Communication
Summary	Abnormal Security email threats, cases, and reporting in your terminal and your AI agents.	Continuity protocol for autonomous AI agents. Agent messaging with SMTP bridge and LN payments.
Category & Scope	Communication	Communication

Tools & Capabilities Breakdown

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).

{
  "mcpServers": {
    "abnormal-security-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "skills"
      ]
    }
  }
}

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

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