Substack MCP Server & Skill

AI Skill
SKILL.md

Domain knowledge for Substack — workflow patterns, data models, and gotchas for your AI agent.

Substack

Substack is a publishing platform for independent writers. The profile search API lets you discover Substack authors by their LinkedIn handle.

Data Model

Profile — Substack author identity with handle, profile URL, leaderboard status, bestseller tier, subscriber estimates, and follower count.
Leaderboard Status — ranking information including position, publication name, category label, and ranking type (paid or trending).

What You Can Do

Author Discovery

Look up any Substack author by their LinkedIn handle. Useful for sales prospecting, journalist outreach, competitive analysis, or verifying whether a LinkedIn contact has a Substack presence.

Audience Intelligence

Get approximate free subscriber counts and follower numbers for Substack publications. Identify top-ranked authors in specific categories. Evaluate publication reach before pitching, sponsoring, or collaborating.

Gotchas

Self-reported handles: LinkedIn handles on Substack profiles are user-provided and unverified by Substack.
Limited data: Only profiles meeting platform authenticity thresholds are returned. Many profiles will return empty results.
No guaranteed match: An empty results array is a normal response.
Multiple results possible: More than one profile may match a single LinkedIn handle.
Daily refresh: Profile data updates at least once daily — not real-time.
Optional fields: Not all profiles expose leaderboard status, bestseller tier, or subscriber counts.

Tools in this Server (1)

Substack Search By Linkedin

Look up Substack author profiles by LinkedIn handle. Returns matching profiles with their Substack handle, profile URL, leaderboard ranking, bestselle...

Frequently Asked Questions

What is the Substack MCP server?

Substack is a publishing platform for independent writers and podcasters. Look up Substack author profiles by LinkedIn handle to discover their publications, leaderboard rankings, subscriber counts, and follower metrics. It provides 1 tools that AI agents can use through the Model Context Protocol (MCP).

How do I connect Substack to my AI agent?

Add the MCPBundles server URL to your MCP client configuration (Claude Desktop, Cursor, VS Code, etc.). The URL format is: https://mcp.mcpbundles.com/bundle/substack. Authentication is handled automatically.

How many tools does Substack provide?

Substack provides 1 tool that can be called by AI agents, along with a SKILL.md that gives your AI agent domain knowledge about when and how to use them.

What authentication does Substack require?

Substack uses API Key. Substack requires credentials. Connect via MCPBundles and authentication is handled automatically.

Setup Instructions

Connect Substack to any MCP client in minutes

https://mcp.mcpbundles.com/bundle/substack

What is MCP?

Model Context Protocol lets AI tools call external capabilities securely through a single URL. This bundle groups tools behind an MCP endpoint that many clients can use.