How to Scrape Substack Newsletters at Scale (No API Key Needed)

If you've ever tried to track what competitors publish on Substack, monitor newsletter trends, or build a dataset of authors in a specific niche — you've probably hit a wall. Substack has no official public API for third-party developers, and their content is rendered dynamically, making traditional scraping brittle. The good news? Substack actually exposes structured JSON endpoints for every publication. In this tutorial, I'll show you these endpoints, explain the data they return, and demonstrate how to scrape Substack newsletters at scale using both code and a no-code solution. Why Scrape Substack? There are several legitimate reasons to collect public Substack data: Competitor research : Track what topics rival newsletters cover, how often they publish, and what resonates with readers Content monitoring : Stay on top of publications in your industry without manually subscribing to dozens of newsletters Lead generation : Build lists of active newsletter authors in a niche for partne