Koskamo

Substack MCP Server

An MCP server enabling LLM clients to interact with Substack for automations like creating posts, managing drafts, and more. It exposes tools for publishing, subscriber management, analytics, reader feeds, comments, and image uploads.

Package and access

Local package with source-attributed installation metadata. Koskamo does not execute packages during review.

Substack MCP Server logo, by Marco MoauroCommunity listingLocal stdioSource reviewed; not executedPublished by Marco Moauro
You need:To use the server, you need to retrieve 3 parameters: Session token Publication URL User ID
Vendor documentation

What you can do with it

  • Create and publish posts
  • Manage drafts
  • Browse reader feeds
  • Manage subscribers and analytics

Source and maintenance

Community listingRegistry 1.3.2
mcp-registry: io.github.marcomoauro/substack-mcp@1.3.2Source repositoryProject website
Maintenance checked

Packages and installation

Source-provided package data. Koskamo has not executed or live-probed this package.

substack-mcp 1.3.2

npmnpx
substack-mcp package definition
{
  "version": "1.3.2",
  "transport": "stdio",
  "identifier": "substack-mcp",
  "runtimeHint": "npx",
  "registryType": "npm",
  "registryBaseUrl": "https://registry.npmjs.org",
  "environmentVariables": [
    {
      "name": "SUBSTACK_PUBLICATION_URL",
      "isRequired": true,
      "description": "Full URL of your Substack publication, including https://",
      "placeholder": "https://your-publication.substack.com"
    },
    {
      "name": "SUBSTACK_SESSION_TOKEN",
      "isRequired": true,
      "description": "Value of the substack.sid or connect.sid cookie from your authenticated Substack session"
    },
    {
      "name": "SUBSTACK_USER_ID",
      "isRequired": true,
      "description": "Numeric user ID returned by Substack's publication_user request",
      "placeholder": "123456789"
    }
  ]
}

Tools

Reported by the attributed source; not independently observed by Koskamo.

No tool definitions available.

Connect from your client

Each snippet configures the same source-provided package; replace placeholders before use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Cursor

Merge this local stdio configuration, replace every placeholder environment value, and restart Cursor. Koskamo has not executed this package.
Cursor configuration
{
  "mcpServers": {
    "substack-mcp-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "substack-mcp@1.3.2"
      ],
      "env": {
        "SUBSTACK_PUBLICATION_URL": "<YOUR_SUBSTACK_PUBLICATION_URL>",
        "SUBSTACK_SESSION_TOKEN": "<YOUR_SUBSTACK_SESSION_TOKEN>",
        "SUBSTACK_USER_ID": "<YOUR_SUBSTACK_USER_ID>"
      }
    }
  }
}

Cline

Merge this local stdio configuration, replace every placeholder environment value, and restart Cline. Koskamo has not executed this package.
Cline configuration
{
  "mcpServers": {
    "substack-mcp-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "substack-mcp@1.3.2"
      ],
      "env": {
        "SUBSTACK_PUBLICATION_URL": "<YOUR_SUBSTACK_PUBLICATION_URL>",
        "SUBSTACK_SESSION_TOKEN": "<YOUR_SUBSTACK_SESSION_TOKEN>",
        "SUBSTACK_USER_ID": "<YOUR_SUBSTACK_USER_ID>"
      }
    }
  }
}

VS Code

Merge this local stdio configuration, replace every placeholder environment value, and restart VS Code. Koskamo has not executed this package.
VS Code configuration
{
  "servers": {
    "substack-mcp-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "substack-mcp@1.3.2"
      ],
      "env": {
        "SUBSTACK_PUBLICATION_URL": "<YOUR_SUBSTACK_PUBLICATION_URL>",
        "SUBSTACK_SESSION_TOKEN": "<YOUR_SUBSTACK_SESSION_TOKEN>",
        "SUBSTACK_USER_ID": "<YOUR_SUBSTACK_USER_ID>"
      }
    }
  }
}

Claude Desktop

Merge this local stdio configuration, replace every placeholder environment value, and restart Claude Desktop. Koskamo has not executed this package.
Claude Desktop configuration
{
  "mcpServers": {
    "substack-mcp-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "substack-mcp@1.3.2"
      ],
      "env": {
        "SUBSTACK_PUBLICATION_URL": "<YOUR_SUBSTACK_PUBLICATION_URL>",
        "SUBSTACK_SESSION_TOKEN": "<YOUR_SUBSTACK_SESSION_TOKEN>",
        "SUBSTACK_USER_ID": "<YOUR_SUBSTACK_USER_ID>"
      }
    }
  }
}

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