Substack MCP

An open-source Model Context Protocol server that enables AI agents to manage Substack publications. It supports creating and editing long-form drafts, publishing short-form Notes, retrieving analytics, and managing consented subscribers. Long-form posts remain draft-only until manually published via the Substack editor, while Notes publish immediately. It includes a CLI for login, diagnostics, and draft workflows.

Package and access

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

Community listingLocal stdioSource reviewed; not executedPublished by conorbronsdon

You need:Use an authenticated account with permission to manage the publication

Vendor documentation

What you can do with it

Create and edit long-form post drafts
Publish short-form Substack Notes
Retrieve publication analytics
Manage consented subscribers

Source and maintenance

Community listingRegistry 1.3.0

mcp-registry: io.github.conorbronsdon/substack-mcp@1.3.0 Source repository Project website

Maintenance checked: Oct 31, 2026, 10:27 PM UTC

Packages and installation

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

@conorbronsdon/substack-mcp 1.3.0

npmnpx

@conorbronsdon/substack-mcp package definition

{
  "version": "1.3.0",
  "transport": "stdio",
  "identifier": "@conorbronsdon/substack-mcp",
  "runtimeHint": "npx",
  "registryType": "npm",
  "environmentVariables": [
    {
      "name": "SUBSTACK_PUBLICATION_URL",
      "isRequired": true,
      "description": "Your Substack publication URL (e.g., https://yourblog.substack.com)",
      "placeholder": "https://yourblog.substack.com"
    },
    {
      "name": "SUBSTACK_SESSION_TOKEN",
      "isRequired": true,
      "description": "connect.sid cookie value from your Substack session"
    },
    {
      "name": "SUBSTACK_USER_ID",
      "isRequired": true,
      "description": "Your Substack user ID",
      "placeholder": "12345"
    }
  ]
}

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-conorbronsdon-substack-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@conorbronsdon/substack-mcp@1.3.0"
      ],
      "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-conorbronsdon-substack-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@conorbronsdon/substack-mcp@1.3.0"
      ],
      "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-conorbronsdon-substack-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@conorbronsdon/substack-mcp@1.3.0"
      ],
      "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-conorbronsdon-substack-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@conorbronsdon/substack-mcp@1.3.0"
      ],
      "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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