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Substack Newsletter Posts Scraper — RSS by Slug

Pull Substack newsletter posts via the public {slug}.substack.com/feed RSS endpoint. One row per post — title, link, author, pubDate, summary. No authentication required.

Example output row

{
"id":"https://lennysnewsletter.substack.com/p/the-source-of-amazons-success",
"title":"The source of Amazon's success",
"link":"https://lennysnewsletter.substack.com/p/the-source-of-amazons-success",
"author":"Lenny Rachitsky",
"pubDate":"Sun, 01 Jun 2025 12:00:00 +0000",
"summary":"A deep dive into the leadership principles that made Amazon dominant..."
}

How to use

Provide a list of Substack newsletter slugs (the subdomain part of <slug>.substack.com):

{
"newsletters":["lennysnewsletter","stratechery","astralcodexten"],
"maxPostsPerNewsletter":25
}

Paywalled newsletters still return titles and summaries via RSS — full body text requires a paid subscription outside this actor.

Pricing

A run fetching 25 posts × 20 newsletters = 500 rows → $0.10.

Buyer

• Content researchers and media analysts monitoring Substack's growing creator ecosystem.
• Newsletter aggregators building reading dashboards or digests across dozens of publications.
• Competitive intelligence teams tracking what top thought-leaders in tech, finance, and AI are publishing.
• Marketing teams doing share-of-voice analysis across influential newsletters.
• Developers building read-later or newsletter-discovery apps who need structured post metadata.

Source

Data is fetched directly from Substack's public RSS endpoint:

https://{slug}.substack.com/feed

No API key or account required. The feed returns the most recent posts for the newsletter. Slugs that return HTTP 404 are logged and skipped (newsletter closed or renamed).