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Substack MCP server

substack.com · Content

Yes. Substack publishes an official MCP server at https://mcp.substack.com/api/v1/mcp. It's hosted and needs an OAuth app that you set up in Substack first. We last checked it on 1 Oct 2026.

Official MCP server
Hosted
Sign-in needs vendor setup

Official MCP server

Substack MCP server

Lets your AI assistant read your Substack publication stats. Read-only, for admins of Bestseller publications.

Address
https://mcp.substack.com/api/v1/mcp
Runs
Hosted
Sign-in
Sign-in needs vendor setup
Official MCP Registry
Not listed
How we know it's official
The vendor's own documentation
Documentation
support.substack.com/hc/en-us/articles/50834026608916-How-to-connect-S...
Tools
Not known. It needs sign-in before it lists them.
First seen
1 Oct 2026
Last checked
Reachable ·
Substack doesn't let AI tools sign in on their own. Create an app (or ask your admin to) in your Substack account first, then use its client ID and secret when your AI client asks.

Connect Substack MCP to Claude

Claude.ai and Claude Desktop (custom connector)

In Claude, open Customize → Connectors → + → Add custom connector, then paste the address.

Claude Code

Connect Substack MCP to ChatGPT

Address

In ChatGPT, open Settings → Apps → Advanced settings, turn on Developer mode, then Create and paste the address. ChatGPT usually only connects to servers with self-serve sign-in or none.

Connect Substack MCP to Cursor

Add to Cursor

Opens Cursor if it's installed. If nothing happens, use the JSON below.

JSON for Cursor, Windsurf and other clients

Connect Substack MCP to VS Code

Add to VS Code

Opens VS Code if it's installed. Otherwise add the JSON settings from the Cursor section to your .vscode/mcp.json.

Substack MCP server questions

Does Substack have an official MCP server?

Yes. Substack publishes its MCP server itself. Substack's own documentation describes it. MartechDB only lists servers a vendor publishes, never community copies.

What is the Substack MCP server URL?

The address is https://mcp.substack.com/api/v1/mcp.

Does the Substack MCP server need an API key?

No, but it needs set-up first: it signs in with OAuth through an app you (or an admin) create in your Substack account.

How do I connect Substack MCP to Claude, ChatGPT or Cursor?

In Claude, add https://mcp.substack.com/api/v1/mcp as a custom connector (Customize, Connectors, Add custom connector). In Cursor, use the Add to Cursor link on MartechDB's page, or paste the JSON settings into your mcp.json. In Claude Code, run: claude mcp add --transport http substack https://mcp.substack.com/api/v1/mcp

Is the Substack MCP server in the official MCP Registry?

No. Substack hasn't published it to the official MCP Registry.

Is the Substack MCP server working?

Yes. It answered our most recent check. We last checked it on 1 Oct 2026.

Change history

What we've seen change for Substack, newest first.

  1. Substack: Substack MCP server added

  2. Substack: Added to MartechDB

Something wrong or out of date? Tell us and we'll check it against the evidence.