What is the key difference between Substack MCP and Postfast MCP?

Substack MCP belongs to the Social Media category with local stdio execution, while Postfast MCP belongs to the Social Media category with local stdio execution.

How do I install Substack MCP or Postfast MCP in Claude Desktop or Cursor?

Copy the mcpServers JSON configuration snippet provided on this page into your claude_desktop_config.json or ~/.cursor/mcp.json file and restart your AI client.

Are Substack MCP and Postfast MCP free or paid?

Substack MCP operates under a Free / Open Source model (other). Postfast MCP operates under a BYOK (Pay Provider Direct) model (other).

Which MCP server has more tools and community activity?

Substack MCP lists 14 tools with 4 views and 34 GitHub stars. Postfast MCP lists 24 tools with 4 views and 5 GitHub stars.

Can I use both Substack MCP and Postfast MCP together in the same MCP host?

Yes! MCP hosts like Claude Desktop, Cursor, Windsurf, Cline, and VS Code support configuring multiple servers under the mcpServers object simultaneously.

Side-by-Side Model Context Protocol Comparison

Substack MCP vs Postfast MCP

In-depth architectural comparison of the Substack MCP and Postfast MCP MCP servers. Compare execution transports, security boundaries, tool capabilities, quality scores, and ready-to-paste client installation snippets for Claude, Cursor, Windsurf, and VS Code.

At a Glance & Executive Verdict

Substack MCP

Social Media · Local stdio

Quality: 68/100 (Great) | Auth: other

Postfast MCP

Social Media · Local stdio

Quality: 53/100 (Good) | Auth: other

Verdict Summary: Choose Substack MCP if you need specialized Social Media tools running via a local process. Choose Postfast MCP if your workspace requires Social Media integration with local subprocess execution. Both servers can be configured concurrently in your client's mcpServers manifest.

Which MCP Server Should You Choose?

Choose Substack MCP when:

You need dedicated capabilities in the Social Media domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: other (Free / Open Source).
You have access to required keys: SUBSTACK_PUBLICATION_URL, SUBSTACK_SESSION_TOKEN, SUBSTACK_USER_ID, SUBSTACK_MCP_HOME.
Primary tools included: get_subscriber_count, list_published_posts, list_drafts.

Explore Substack MCP Details

Choose Postfast MCP when:

You need dedicated capabilities in the Social Media domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: other (BYOK (Pay Provider Direct)).
You have access to required keys: POSTFAST_API_KEY, POSTFAST_API_URL.

Feature & Specification Comparison

Specification	Substack MCP conorbronsdon Social Media	Postfast MCP peturgeorgievv-factory Social Media
Summary	MCP server for Substack — read posts, manage drafts, publish Notes, get comments, and upload images. Safe by design: cannot publish or delete posts.	Schedule and manage social media posts across 10 platforms (Instagram, Facebook, TikTok, X, LinkedIn, YouTube, Threads, Pinterest, Bluesky, Telegram) from any MCP-compatible AI assistant.
Category & Scope

Tools & Capabilities Breakdown

Substack MCP Tools (14)

get_subscriber_count

Get the current subscriber count for your Substack publication. Returns `precision`: 'exact' when the API reports a true count, 'approximate' when only Substack's rounded value is available (the real number is that or higher — render it hedged, e.g. '1,000+'), or 'unavailable' with count -1. Never treat an approximate value as exact.

list_published_posts

List published posts with pagination. Returns title, date, slug, and URL for each post.

list_drafts

List draft posts. Returns title, creation date, and audience for each draft.

get_post

Get the full content of a published post by ID. Returns title, body HTML, metadata.

get_draft

Get the full content of a draft post by ID. Returns title, body, metadata.

Ready-to-Paste Client Configurations

Paste either (or both) of these JSON server blocks into your client config file (e.g. claude_desktop_config.json or ~/.cursor/mcp.json).

Substack MCP Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "conorbronsdon-substack-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@conorbronsdon/substack-mcp"
      ],
      "env": {
        "SUBSTACK_PUBLICATION_URL": "YOUR_SUBSTACK_PUBLICATION_URL_HERE",
        "SUBSTACK_SESSION_TOKEN": "YOUR_SUBSTACK_SESSION_TOKEN_HERE",
        "SUBSTACK_USER_ID": "YOUR_SUBSTACK_USER_ID_HERE",
        "SUBSTACK_MCP_HOME": "YOUR_SUBSTACK_MCP_HOME_HERE"
      }
    }
  }
}

Postfast MCP Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "peturgeorgievv-factory-postfast-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "peturgeorgievv-factory-postfast-mcp"
      ],
      "env": {
        "POSTFAST_API_KEY": "YOUR_POSTFAST_API_KEY_HERE",
        "POSTFAST_API_URL": "YOUR_POSTFAST_API_URL_HERE"
      }
    }
  }
}

Frequently Asked Questions

Substack MCP is categorized under Social Media and uses a local stdio subprocess. In contrast, Postfast MCP belongs to Social Media using local stdio subprocess. Select Substack MCP when you need capabilities focused on social media and Postfast MCP when you require tools for social media.

More alternatives to Substack MCP More alternatives to Postfast MCP Social Media category hub