Free Substack Newsletter Scraping API — No Signup Required

Substack doesn't have a public API. If you want to programmatically access newsletter content — subscriber counts, post archives, author info — you're stuck reverse-engineering their frontend or scraping HTML. So I built a free API that does it for you. No API key, no signup, no rate limit games. Just curl and go. The API Base URL: https://frog03-20494.wykr.es/api/v1/substack It wraps Substack's internal endpoints into a clean REST interface. Returns JSON. Handles pagination. Works with any public Substack newsletter. 3 Things You Can Do Right Now 1. Get Newsletter Metadata Pull subscriber info, description, and author details for any Substack: curl -s "https://frog03-20494.wykr.es/api/v1/substack/newsletter?url=https://platformer.news" | jq . Returns: { "name" : "Platformer" , "author" : "Casey Newton" , "description" : "Tech and democracy coverage" , "subscriber_count" : 250000 , "post_count" : 1420 , "url" : "https://platformer.news" } 2. Fetch Recent Posts Get the latest posts with