Substack Publisher Mcp vs Opn Mcp

In-depth architectural comparison of the Substack Publisher Mcp and Opn Mcp 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 Substack Publisher Mcp when:

• You need dedicated capabilities in the Marketing domain.
• You prefer remote streaming HTTP/SSE transport architecture.
• Your security boundary fits: API Key required (BYOK (Pay Provider Direct)).
• You have access to required keys: SUBSTACK_API_KEY, SUBSTACK_API_KEY_MAIN, SUBSTACK_API_KEY_TECH, SUBSTACK_API_KEY_COMPANY.
• Primary tools included: Access post metadata and content by URL slug, Fetch post engagement metrics like opens and clicks, Retrieve subscriber counts including paid and free trials.

Explore Substack Publisher Mcp Details

Choose Opn Mcp when:

• You need dedicated capabilities in the Marketing domain.
• You prefer local stdio subprocess transport architecture.
• Your security boundary fits: API Key required (Free / Open Source).
• You have access to required keys: .

Feature & Specification Comparison

Specification	Substack Publisher Mcp dkships Marketing	Opn Mcp ysalitrynskyi Marketing
Summary	Read-only access to posts, engagement stats, subscriber counts, and subscriber lookup through Substack's official Publisher API. Supports multiple publications.	Shorten links, read click analytics, generate branded QR codes, and manage links on opn.onl — the open-source, self-hostable URL shortener. Works with the hosted service or your own instance.
Category & Scope

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": {
    "dkships-substack-publisher-mcp": {
      "url": "https://img.shields.io/badge/License-MIT-blue.svg)](LICENSE"
    }
  }
}

{
  "mcpServers": {
    "ysalitrynskyi-opn-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "opn-mcp"
      ],
      "env": {
        "OPN_API_KEY": "YOUR_OPN_API_KEY_HERE",
        "OPN_BASE_URL": "YOUR_OPN_BASE_URL_HERE"
      }
    }
  }
}

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