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Substack MCP Server

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Substack drafts, Notes, analytics and consented subscribers. Long-form posts stay draft-only.

Source code Website

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

NPM package @conorbronsdon/substack-mcp
Claude Code 
claude mcp add substack-mcp-server -e 'SUBSTACK_PUBLICATION_URL=<SUBSTACK_PUBLICATION_URL>' -e 'SUBSTACK_SESSION_TOKEN=<your substack_session_token>' -e 'SUBSTACK_USER_ID=<SUBSTACK_USER_ID>' -- npx -y @conorbronsdon/substack-mcp@1.3.0
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "substack-mcp-server": {
            "command": "npx",
            "args": [
                "-y",
                "@conorbronsdon/substack-mcp@1.3.0"
            ],
            "env": {
                "SUBSTACK_PUBLICATION_URL": "<SUBSTACK_PUBLICATION_URL>",
                "SUBSTACK_SESSION_TOKEN": "<your substack_session_token>",
                "SUBSTACK_USER_ID": "<SUBSTACK_USER_ID>"
            }
        }
    }
}

Environment variables

  • SUBSTACK_PUBLICATION_URL required Your Substack publication URL (e.g., https://yourblog.substack.com)
  • SUBSTACK_SESSION_TOKEN required secret connect.sid cookie value from your Substack session
  • SUBSTACK_USER_ID required Your Substack user ID

Frequently asked questions

What is Substack MCP Server?

Substack drafts, Notes, analytics and consented subscribers. Long-form posts stay draft-only.

How do I install Substack MCP Server?

It runs on your machine. In Claude Code: claude mcp add substack-mcp-server -e 'SUBSTACK_PUBLICATION_URL=<SUBSTACK_PUBLICATION_URL>' -e 'SUBSTACK_SESSION_TOKEN=<your substack_session_token>' -e 'SUBSTACK_USER_ID=<SUBSTACK_USER_ID>' -- npx -y @conorbronsdon/substack-mcp@1.3.0. For other clients, paste the JSON configuration from this page into their MCP settings.

Does Substack MCP Server need an API key?

Yes. It expects SUBSTACK_PUBLICATION_URL, SUBSTACK_SESSION_TOKEN, SUBSTACK_USER_ID, which you set in its configuration.

Is Substack MCP Server open source?

Its code is public on GitHub, but the repository does not declare a standard license.

Who maintains Substack MCP Server?

It is published by conorbronsdon. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.