About
This tool acts as a bridge, connecting Substack's official Publisher API to Model Context Protocol (MCP) clients like Claude and Cursor. It provides a stable and reliable way to query critical publication data such as post analytics, subscriber numbers, and individual subscriber details. Unlike other solutions that might rely on fragile internal APIs or browser cookies, this server leverages Substack's documented API and API key authentication, ensuring greater stability and built-in support for managing multiple publications.