MCP server · Social media

Substack MCP server

Lets your AI read and manage your Substack posts, notes, comments and replies for you.

Social media For writers For creatives For marketing Social Media

This is a helper that connects your AI assistant to Substack. Once it is set up, you can ask your AI to look at your posts, read comments, and even draft replies. It is handy if you write on Substack and want less clicking around.

What is an MCP server? The 30-second version

On its own, your AI can only chat with you. An MCP server is a small helper program that gives your AI a new skill or a connection to an app, and here that app is Substack. With this helper running, your AI can look things up on Substack and do things there when you ask. You stay in charge, because it asks before it posts anything.

What this MCP server does

You ask your AI something about your Substack, like which comments still need a reply. Your AI uses this helper to talk to Substack and fetch that information. The helper sends back the list, and your AI shows it to you in the chat. If you want to reply, your AI can draft one for you, and you approve it before it goes live. Nothing gets posted unless you say yes.

Flow diagram: you ask your AI “Which comments still need a reply?”, the Substack MCP server connects it to Substack, and you get back A list of comments in your chat.

Click to zoom

What you can do with it

List your Substack posts and see their stats
Read the full comment tree on a post
Find comments you have not replied to yet
Draft a reply to a comment and post it after you confirm
React to or restack a post or note
Search posts on your publication or another one
Check your reader feed and profile

Try asking your AI

“List unanswered comments on my latest post”
“Draft a warm reply to comment 12345”
“Show me my last five posts and their reaction counts”
“Search my publication for posts about writing”

What it gives back to you

You get back lists, counts and text answers shown right in your chat. For example, a list of comments with who wrote them and what they said. If you ask for a draft, you see the suggested reply before anything is posted. When you confirm, it tells you the reply went through.

Before you start

What you need

A Substack account
Your Substack login cookie (the tool can grab it from your browser or you paste it in)
A program called uv installed on your computer
An AI app that supports MCP, like Cursor or Claude Desktop

Good to know

It can post comments, replies, reactions and restacks on your Substack account, so check drafts before you confirm them.

Install it with your AI

Add Substack MCP server to your AI, no technical skills needed

You don't install anything by hand. You copy one prompt, paste it into an AI that can work on your computer, and it checks, installs and connects the server for you, asking you when it needs something.

Sign in to get the install prompt

Members get a ready-made prompt that lets the Claude desktop app check Substack MCP server, install it and connect it for them, step by step. You don't need any technical skills: you copy, paste and answer a few questions. Your connected AI can also find and install any of the 4,066 MCP servers here for you.