Substack Example

mcpkit create https://substack.com

cd mcp-stagehand-substack.com
npm install
npm run build

npx @modelcontextprotocol/inspector node dist/index.js

claude mcp add --transport stdio "substack" -- node /absolute/path/to/dist/index.js

# Authenticate to access premium content
mcpkit contexts create substack.com

{
  name: "create_weekly_digest",
  description: "Create a weekly digest from favorite publications",
  inputSchema: {
    type: "object",
    properties: {
      publications: {
        type: "array",
        items: { type: "string" },
        description: "List of publication URLs"
      }
    }
  }
}

{
  name: "track_topic",
  description: "Monitor Substack for posts about a specific topic",
  inputSchema: {
    type: "object",
    properties: {
      topic: { type: "string" },
      frequency: {
        type: "string",
        enum: ["daily", "weekly"]
      }
    }
  }
}

// Add to read_post implementation
const markdown = `# ${post.title}

By ${post.author} on ${post.date}

${post.content}

---
Source: ${post.url}
`;

// Save or return markdown
await fs.writeFile(`posts/${post.slug}.md`, markdown);

"Create a summary of this week's posts from my favorite tech newsletters:
Stratechery, Platformer, and The Generalist"

"Search all Substack posts about Web3 from the past 3 months and
identify the main themes and controversies"

"Track all posts from Ben Thompson and create a monthly summary
of his analysis on Big Tech companies"

case "analyze_publication_style": {
  // Read multiple posts
  const posts = await getRecentPosts(publicationUrl);

  // Extract text
  const content = posts.map(p => p.content).join("\n\n");

  // Analyze with AI
  const analysis = await analyzeWritingStyle(content);

  return {
    content: [{
      type: "text",
      text: JSON.stringify(analysis, null, 2)
    }]
  };
}

case "get_recommendations": {
  const { interests } = args as { interests: string[] };

  // Search for publications matching interests
  const results = await Promise.all(
    interests.map(interest =>
      searchPublications(interest)
    )
  );

  // Rank and dedupe
  const recommendations = rankPublications(results.flat());

  return {
    content: [{
      type: "text",
      text: JSON.stringify(recommendations, null, 2)
    }]
  };
}