I Built an MCP That Publishes Your Blog to Every Platform With One Sentence to Claude

This is a submission for the Notion MCP Challenge What I Built Every developer I know has the same problem. They write a solid post, spend 20 minutes formatting it for Dev.to, copy-paste to Hashnode, re-upload the images that broke because Notion's CDN URLs expire, then give up on Medium entirely. The writing was the easy part. The publishing killed the momentum. BlogCast MCP fixes that. It's an open-source MCP server + dashboard that turns Notion into a publishing hub. Write once — in Notion or in the built-in rich text editor — then tell Claude to publish it everywhere. "Publish my TypeScript post to Dev.to and Hashnode" That's it. One sentence. Done. What it actually does: Publishes to Dev.to, Hashnode, and Medium simultaneously Handles Notion's expiring image URLs automatically (downloads → caches → re-uploads to each platform's CDN) Adapts content per platform — Medium gets clean HTML, Dev.to/Hashnode get optimized Markdown Syncs analytics back into Notion (views, reactions, comme