Substack MCP vs Writio

In-depth architectural comparison of the Substack MCP and Writio 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 MCP when:

• You need dedicated capabilities in the Social Media domain.
• You prefer local stdio subprocess transport architecture.
• Your security boundary fits: other (Free / Open Source).
• You have access to required keys: SUBSTACK_SESSION_COOKIE, SUBSTACK_USER_ID, SUBSTACK_MCP_HOME.
• Primary tools included: get_subscriber_count, list_published_posts, list_drafts.

Explore Substack MCP Details

Choose Writio when:

• You need dedicated capabilities in the Social Media domain.
• You prefer local stdio subprocess transport architecture.
• Your security boundary fits: No auth required (Free / Open Source).
• Primary tools included: create_draft, generate_hooks, generate_hashtags.

Explore Writio Details

Feature & Specification Comparison

Specification	Substack MCP conorbronsdon Social Media	Writio Social Media
Summary	MCP server for Substack — read posts, manage drafts, publish Notes, get comments, and upload images. Safe by design: cannot publish or delete posts.	LinkedIn-native AI content creation, scheduling & analytics via MCP.
Category & Scope	Social Media	Social Media

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": {
    "conorbronsdon-substack-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@conorbronsdon/substack-mcp"
      ],
      "env": {
        "SUBSTACK_SESSION_COOKIE": "YOUR_SUBSTACK_SESSION_COOKIE_HERE",
        "SUBSTACK_USER_ID": "YOUR_SUBSTACK_USER_ID_HERE",
        "SUBSTACK_MCP_HOME": "YOUR_SUBSTACK_MCP_HOME_HERE"
      }
    }
  }
}

{
  "mcpServers": {
    "writio": {
      "command": "npx",
      "args": [
        "-y",
        "@writio/mcp-server"
      ]
    }
  }
}

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