Substack MCP Server

An MCP server for Substack. Read your publication data and manage drafts from your AI agent. Long-form posts are draft-only by design - no publish, no delete. Short-form Notes publish immediately. Its 16 documented tools cover draft, posts, note. It runs locally over stdio via the published package.

People connecting design tools to Claude, Cursor, VS Code, or another MCP client. The project is written in TypeScript.

VERIFIED ACTIVE

LAST COMMIT 2026-08-06 · ★ 20 · #27 OF 74 MAINTAINED DESIGN · VERIFIED 2026-08-25

MIT · TypeScript servers · how we verify → /methodology

01 · Install Substack MCP Server

before you install - you'll need

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

Claude Code

claude mcp add conorbronsdon-substack-mcp -- npx -y @conorbronsdon/substack-mcp

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "conorbronsdon-substack-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@conorbronsdon/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

license MIT - declared in the repository

npm package @conorbronsdon/substack-mcp - published under the repo owner's npm scope (@conorbronsdon)

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

03 · What Substack MCP Server can do

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

What you can build

With this server connected, an agent can get your publication's current subscriber count, list published posts with pagination, list draft posts, and get full content of a published post by ID.

Capability map

Tools grouped from the project's README - what Substack MCP Server lets an agent do.

read & search

8 tools - e.g. Get your publication's current subscriber count; List published posts with pagination; List draft posts

get_subscriber_count · list_published_posts · list_drafts · get_post · get_post_comments · get_sections…

Draft

3 tools - e.g. Get full content of a draft by ID; Create a new draft from markdown (private); Update an existing draft (unpublished only; private)

get_draft · create_draft · update_draft

Note

2 tools - e.g. Publish a Substack Note (short-form, publishes immediately); Publish a Note with a link card attachment (publishes immediately)

create_note · create_note_with_link

create & write

1 tool - e.g. Upload an image to Substack's CDN - returns a publicly-fetchable (unlisted) URL

upload_image

delete

1 tool - e.g. Too destructive for an AI tool

Delete

Schedule

1 tool - e.g. Use Substack's editor for scheduling. (list_scheduled_posts reads what you've queued there, but this server never creates, edits, or cancels a schedule.)

Schedule

Limitations (from the README)

- This server uses Substack's unofficial API. It may break if Substack changes their endpoints. - Session tokens are sent as cookies. Keep your SUBSTACK_SESSION_TOKEN secure. - The server checks your credentials on startup, after the MCP handshake completes, and only warns - it never blocks startup on a network call. Tools still error individually if the token is expired, which is where the failure is actionable. - S

Latest releases

v0.6.2 · 2026-08-03

unblock the MCP handshake, handle SIGTERM, stop shipping tests into dist

v0.6.1 · 2026-08-03

generalize disclaimer to company-neutral wording · never report the subscriber sample as the count · Add UTM tags to chainofthought.show and conorbronsdon.com links · publish to the MCP registry, not just npm · Add a…

v0.6.0 · 2026-07-10

accept a local image file path (closes #20) · add CHANGELOG, CONTRIBUTING, and PR template · Release 0.6.0 · New Contributors · @quango2304 made their first contribution in

04 · Who maintains Substack MCP Server

Substack MCP Server is maintained by conorbronsdon. We track 8 MCP servers from conorbronsdon - 8 actively maintained, 32 combined GitHub stars, oldest repo from Mar 2026. Full record: all servers from conorbronsdon.

Google Workspace MCP Server Google Workspace as 39 curated MCP tools: Gmail, Calendar, Drive, Sheets, Docs, and Tasks. ★ 8

05 · Facts

repository: github.com/conorbronsdon/substack-mcp
category: design - ranked #27 of 74 actively-maintained design servers as of 2026-08-25.
release cadence: 6 releases in the last 90 days (latest 2026-08-03)
registry: io.github.conorbronsdon/substack-mcp (active, first published 2026-06-12 · 4 versions)
packages: npm:@conorbronsdon/substack-mcp

06 · Substack MCP Server FAQ

Is Substack MCP Server still maintained?

Yes - as of 2026-08-25, its last commit was 2026-08-06 and it shipped 6 releases in the last 90 days. We re-verify nightly.

What can Substack MCP Server do?

With this server connected, an agent can get your publication's current subscriber count, list published posts with pagination, list draft posts, and get full content of a published post by ID.

How do I install Substack MCP Server?

Run `npx -y @conorbronsdon/substack-mcp`. The README documents 5 environment variables (SUBSTACK_PUBLICATION_URL, SUBSTACK_SESSION_TOKEN, SUBSTACK_USER_ID…) to set first. Set SUBSTACK_PUBLICATION_URL, SUBSTACK_SESSION_TOKEN, SUBSTACK_USER_ID, SUBSTACK_REQUEST_TIMEOUT_MS before connecting. SUBSTACK_USER_AGENT is optional or environment-specific per the README. You can also paste the ready-made client config above.

Does Substack MCP Server 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

Alternatives to Substack MCP Server

Maintained design servers if Substack MCP Server isn't the fit.

More design MCP servers · Decantr Ai MCP Server · SmartCLI - drive terminal TUIs · Editmamei · BrandKit MCP · Electrik Slate

More TypeScript MCP servers · Contentrain · Orca Router · Calc MCP · Cookie MCP · Home Assistant MCP · see all