Substack Publisher MCP

What it does

Substack Publisher MCP is an MCP server that connects to Substack's official Publisher API, allowing AI clients to retrieve post data, subscriber lists, and newsletter analytics. It bridges Substack's publishing platform into MCP-compatible tools like Claude and Cursor.

Tools

The README does not enumerate specific tools, but based on the package description and keywords, the server exposes tools for:

• Post analytics — Retrieve metrics and data for your Substack posts
• Subscriber management — Access and export subscriber lists
• Newsletter analytics — View open rates, click data, and engagement metrics
• Publisher API queries — General queries against the Substack Publisher API

Installation

{
  "mcpServers": {
    "substack-publisher": {
      "command": "npx",
      "args": ["-y", "substack-publisher-mcp"],
      "env": {
        "SUBSTACK_API_KEY": "your-publisher-api-key"
      }
    }
  }
}

Add to your claude_desktop_config.json and restart Claude Desktop. Requires a Substack Publisher API key.

Supported hosts

• Claude Desktop
• Cursor
• Any MCP-compatible client (stdio transport)