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Substack MCP Server

by conorbronsdon·io.github.conorbronsdon/substack-mcp·v1.3.0·39 stars
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Substack drafts, Notes, analytics and consented subscribers. Long-form posts stay draft-only.

B83/100grade B
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Safety scan
B83/100

full report

Adoption
Established

39 stars496 downloads/wk

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If you have run it, two minutes of your experience saves the next person an afternoon.

Substack MCP Server tools

No tool declarations could be read from the package source. They show once the server is installed.

Public scan report

scanner v0.1.10 · 2026-10-02 · same rubric, same numbers if you re-run it

no findings
  • Code scan86 source files scanned25/25
  • –Live reliabilityno gateway calls yet and no remote to proben/a
  • –Tool poisoningtools not inspected (local package is not executed); not countedn/a
  • Auth qualitystatic API keys via environment variables6/15
  • Maintenancelast push 0 days ago15/15
  • Maintainer identityregistry namespace matches repository owner; GitHub account older than a year8/10
Overall 83/100. Components that don't apply are left out of the denominator. Any critical finding is an F.RubricAppeal a findingJSON

How Substack MCP Server compares

Against every graded MCP server, from our own scans and uptime checks. Updated after each scan run.

Safety score
83/100
higher than 65% of 48,255 servers
GitHub stars
39
more than 93% of 28,688 servers
Downloads a week
496
more than 88% of 12,191 servers with a package

Release history: 3 versions in the registry since 2026-09-14, latest 2026-09-24, typically one every 5 days.

Install Substack MCP Server in Claude Code, Cursor or VS Code

Runs npx -y @conorbronsdon/substack-mcp on your machine. Read the scan report first; the gateway never runs local packages.

claude mcp add substack-mcp -- npx -y @conorbronsdon/substack-mcp
Add to Cursor

What the publisher says

From the Substack MCP Server repository's README, as published. We do not edit it. Read it on GitHub

substack-mcp

Create and manage your Substack newsletter from your AI assistant or terminal. Prepare rich drafts, search your archive, publish Notes, inspect analytics, and manage explicitly consented free subscribers across publications. Review and publish long-form posts in Substack.

The demo runs actual MCP handlers against offline sample data. No live API calls or publication occur. Follow the draft workflow to create, find, export and review a post.

Safe by design — with one loud exception: This server cannot publish or delete long-form posts. Post tools create and edit drafts only; you review and publish manually through Substack's editor. The exception is Substack Notes: createnote and createnotewithlink publish short-form Notes immediately, because Notes have no draft state on Substack. Treat the Note tools as public-publish actions — there is no preview step and no undo from this server. The split is proportionate review, the piece of trust infrastructure for agents this server cares most about: the high-stakes surface gets a human gate, and the exception is stated loudly.

This server imposes no Bestseller-status check. Use an authenticated account with permission to manage the publication; individual operations depend on your Substack access. Connect through local stdio or self-hosted HTTP.

For 1.0 setup coverage and account eligibility, see compatibility. Maintainers can use the release checklist and distribution inventory.

Contents: Quick start · Setup · Tools · Operator CLI · Draft workflow · Export · Markdown · Multiple publications · Transports · Compatibility

Quick start

  1. Install and sign in. Browser login needs the optional Playwright dependency:
npm install @conorbronsdon/substack-mcp playwright
   npx playwright install chromium
   npx substack-mcp login https://yourblog.substack.com --user-id 12345

Shortened. The full README is on GitHub.

Nothing above is checked by us. What we check is on the safety report.

Substack MCP Server: common questions

Is Substack MCP Server safe?
Mostly: it is graded B (83/100). Read the Substack MCP Server safety report
How do I install Substack MCP Server?
It runs on your machine. Copy the Claude Code, Cursor, VS Code or Claude Desktop config from the install section.
Does Substack MCP Server need an API key?
Yes. The registry entry asks for SUBSTACK_SESSION_TOKEN.
Is Substack MCP Server maintained?
The last commit was 33 days ago (2026-10-02). The latest release is v1.3.0.
How does Substack MCP Server compare with other MCP servers?
safety score 83/100 (higher than 65% of 48,255 servers); github stars 39 (more than 93% of 28,688 servers); downloads a week 496 (more than 88% of 12,191 servers with a package). Full comparison.

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