Substack Publisher

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.

Key Features

• Integrates with Substack's official Publisher API
• Utilizes stable API key authentication
• Supports querying multiple Substack publications simultaneously
• Provides access to post analytics, including clicks, opens, and new subscriptions
• Retrieves daily subscriber counts by type (total, paid, free trial, etc.)
• 1 GitHub stars

Use Cases

• Query Substack publication data and analytics using AI assistants (e.g., Claude, Cursor)
• Programmatically monitor newsletter performance and subscriber growth
• Automate reporting or analysis of Substack posts and subscriber engagement