Getpoststack MCP vs ConnectMachine

In-depth architectural comparison of the Getpoststack MCP and ConnectMachine 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 Getpoststack MCP when:

• You need dedicated capabilities in the Communication domain.
• You prefer local stdio subprocess transport architecture.
• Your security boundary fits: API Key required (BYOK (Pay Provider Direct)).
• You have access to required keys: POSTSTACK_API_KEY.
• Primary tools included: send_email, send_batch_emails, list_emails.

Explore Getpoststack MCP Details

Choose ConnectMachine when:

• You need dedicated capabilities in the Communication domain.
• You prefer local stdio subprocess transport architecture.
• Your security boundary fits: OAuth 2.0 (Free / Open Source).
• Primary tools included: list_contacts, get_contact, search_contacts.

Explore ConnectMachine Details

Feature & Specification Comparison

Specification	Getpoststack MCP getpoststack Communication	ConnectMachine Communication
Summary	EU-hosted email API exposed as MCP tools — send transactional and marketing email, manage contacts and segments, run broadcasts, render templates, and read analytics from Claude/Cursor. GDPR compliant, EU-only data residency (Germany + Finland). npx -y @poststack.dev/mcp.	Manage your ConnectMachine contacts, networks, events, and digital business cards.
Category & Scope	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": {
    "getpoststack-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@poststack.dev/mcp"
      ],
      "env": {
        "POSTSTACK_API_KEY": "YOUR_POSTSTACK_API_KEY_HERE"
      }
    }
  }
}

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

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