Quick Viral Notes

Quick Viral Notes, by Build to Launch, is for Substack writers who want to post Notes about every article without writing each one by hand. Paste the URL of a published post or a draft. The app pulls the full text, finds the ideas in it, and labels each one by type: a diagnosis, a piece of advice, a contrarian take. Then it writes posts from formulas that Substack writers use. Every idea goes into a Knowledge Bank, so you can reuse a strong one later. The Chrome extension schedules and posts Notes from your browser. The yearly plan adds MCP access, so Claude or Cursor can generate Notes while you work. The free trial needs no card.

Who it is for

Writers who publish long-form articles, on Substack, Medium or their own blog, and want to post Notes and social posts about each one without writing every post by hand. It fits a writer whose articles are already full of ideas but who has little time to turn them into short posts. The Chrome extension suits people who schedule Substack Notes from the browser, and the MCP suits people who already work in Claude or Cursor.

Why I built it

I write long articles, and I kept running into the same wall: the ideas were already in them, but pulling those ideas out into short posts for Substack Notes, LinkedIn or X felt like too much work. Before this, I built a lazy inspirational quotes generator that pulled random quotes from an AI model. It made me wonder what would happen if the posts came from my own work instead. So I asked AI to pull my Substack articles and write Notes from set templates, and the results were good enough to build an interface around. Quick Viral Notes was my second public-facing project. Launch was not smooth: I fought Gunicorn timeouts to get it live, and right after launch DeepSeek went down and took my note generation with it, so I learned to keep a backup model the hard way. Today the app sorts each idea by type, writes from formulas Substack writers use, keeps every idea in a Knowledge Bank, and runs from a Chrome extension or through MCP in Claude and Cursor.