Substack MCP Server (marcomoauro)

A Model Context Protocol (MCP) Server for Substack enabling LLM clients to interact with Substack's API for automations like creating posts, managing drafts, and more. It runs locally over stdio via the published package.

People who work with newsletter, substack and automation and want it reachable from Claude, Cursor, VS Code, or another MCP client. The project is written in JavaScript.

VERIFIED ACTIVE

LAST COMMIT 2026-09-03 · ★ 73 · #32 OF 227 MAINTAINED AUTOMATION · VERIFIED 2026-09-18

MIT · JavaScript servers · how we verify → /methodology

01 · Install Substack MCP Server (marcomoauro)

before you install - you'll need

Set SUBSTACK_PUBLICATION_URL, SUBSTACK_SESSION_TOKEN before connecting. SUBSTACK_USER_ID is optional or environment-specific per the README.

Claude Code

claude mcp add marcomoauro-substack-mcp -- npx -y substack-mcp

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "marcomoauro-substack-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "substack-mcp"
      ]
    }
  }
}

Same JSON for Cursor. For VS Code, rename the top-level key from `mcpServers` to `servers`.

Using another client? Same JSON, different key

Claude Desktop · mcpServers

Cursor · mcpServers

VS Code · servers

Windsurf · mcpServers

Zed · context_servers

Cline · mcpServers

Roo Code · mcpServers

Continue · mcpServers

LibreChat · mcpServers

Gemini CLI · mcpServers

Codex CLI · mcp_servers

Full setup guides: every client.

02 · Evidence

Security posture

What to check before giving this server access to your agent - from the registry, GitHub, and our own probes. We don't score safety; we show what's verifiable.

runs as local process (stdio) - runs on your machine with your user's permissions · container (OCI image) - can be sandboxed away from your filesystem

license MIT - declared in the repository

npm package substack-mcp - unscoped; check the name against the project README before installing

registry namespace io.github.marcomoauro is GitHub-verified and matches the repo owner

03 · What Substack MCP Server (marcomoauro) can do

Prose above is summarized from the project's README and registry record - no invented capabilities.

Latest releases

v1.3.2 · 2026-09-03

export_subscribers failed on every call. It works now. · Substack answers 400 {"error":"Export not ready"} while it generates the file - for · about three seconds even on a six-row export. The first poll went out…

v1.3.1 · 2026-08-29

substack-mcp is now published in the official MCP Registry, with both · installation methods under one verified server name: · io.github.marcomoauro/substack-mcp · npm [email protected] · Docker…

v1.3.0 · 2026-08-09

upload_image now takes a local file, not just a URL. · Before, an image had to live at a public URL before Substack could host it. Now you can · point at a file on your own machine: · upload_image({path…

04 · Who maintains Substack MCP Server (marcomoauro)

Substack MCP Server is maintained by marcomoauro. It's the only MCP server we track from this author; the repo dates to May 2025.

05 · Facts

repository
github.com/marcomoauro/substack-mcp
website
https://implementing.substack.com/p/mcp-server-for-substack
category
automation - ranked #32 of 227 actively-maintained automation servers as of 2026-09-18.
release cadence
4 releases in the last 90 days (latest 2026-09-03)
registry
io.github.marcomoauro/substack-mcp (active, first published 2026-08-29 · 2 versions)
packages
npm:substack-mcp · oci:docker.io/marcomoauro/substack-mcp:v1.3.2

06 · Substack MCP Server (marcomoauro) FAQ

What is Substack MCP Server (marcomoauro)?

A Model Context Protocol (MCP) Server for Substack enabling LLM clients to interact with Substack's API for automations like creating posts, managing drafts, and more. It runs locally over stdio via the published package.

Is Substack MCP Server (marcomoauro) still maintained?

Yes - as of 2026-09-18, its last commit was 2026-09-03 and it shipped 4 releases in the last 90 days. We re-verify nightly.

How do I install Substack MCP Server (marcomoauro)?

Run `npx -y substack-mcp`. The README documents 3 environment variables (SUBSTACK_PUBLICATION_URL, SUBSTACK_SESSION_TOKEN, SUBSTACK_USER_ID) to set first. Set SUBSTACK_PUBLICATION_URL, SUBSTACK_SESSION_TOKEN before connecting. SUBSTACK_USER_ID is optional or environment-specific per the README. You can also paste the ready-made client config above.

Does Substack MCP Server (marcomoauro) run locally?

Yes - it's a stdio server: it runs on your machine (via npx) with your user's permissions. Your data stays local unless the server itself calls external APIs.

07 · Alternatives to Substack MCP Server (marcomoauro)

Alternatives to Substack MCP Server (marcomoauro)

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  6. Stripe Agent Toolkit MCP server integrating with Stripe - tools for customers, products, payments, and more. ★ 1,822 · 2026-09-17

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