FastMCP server for Substack — publish Notes and posts, pull analytics, manage dr

Connect Runs on your machine

claude mcp add substack-mcp -e SUBSTACK_SID_COOKIE=<SUBSTACK_SID_COOKIE> -- https://github.com/adelaidasofia/substack-mcp/releases/download/v0.1.0/substack-mcp.mcpb

{
  "mcpServers": {
    "substack-mcp": {
      "command": "https://github.com/adelaidasofia/substack-mcp/releases/download/v0.1.0/substack-mcp.mcpb",
      "args": [],
      "env": {
        "SUBSTACK_SID_COOKIE": "<SUBSTACK_SID_COOKIE>"
      }
    }
  }
}

{
  "mcpServers": {
    "substack-mcp": {
      "command": "https://github.com/adelaidasofia/substack-mcp/releases/download/v0.1.0/substack-mcp.mcpb",
      "args": [],
      "env": {
        "SUBSTACK_SID_COOKIE": "<SUBSTACK_SID_COOKIE>"
      }
    }
  }
}

{
  "servers": {
    "substack-mcp": {
      "type": "stdio",
      "command": "https://github.com/adelaidasofia/substack-mcp/releases/download/v0.1.0/substack-mcp.mcpb",
      "args": [],
      "env": {
        "SUBSTACK_SID_COOKIE": "<SUBSTACK_SID_COOKIE>"
      }
    }
  }
}

Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.

Tools

This server runs locally, so its tools are listed by your MCP client once it starts.

Environment variables

Details

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