Substack Scraper: posts, likes, comments and full text

Scrape any Substack newsletter: on substack.com or a custom domain. Every post comes with:

• title, subtitle, date, URL, authors, tags and section;
• likes, comments and restacks;
• paywall status (free vs paid), post type (newsletter, podcast, thread) and word count;
• cover image and podcast audio URL;
• optionally the full text (HTML and plain text) of free posts.

Why this one:

• $0.50 per 1,000 posts. No start fee, no monthly rent. Full text is an optional $0.0005 per free post. Paywalled posts are never charged for text.
• Any publication format: astralcodexten, @astralcodexten, https://www.lennysnewsletter.com or any post URL.
• Search inside a publication (searchQuery) and stop at a date (dateFrom), so you don't pay for older posts.
• Monitoring mode (onlyNewPosts): schedule it and each run returns only new posts.
• Reliable paging: Substack's archive silently skips posts with large page sizes, so the Actor pages 12 at a time. That's the size that returns every post.

Use cases

• Competitor and creator research: which topics get the most likes and comments, how often they publish, what share is paywalled.
• Newsletter monitoring: new posts from a list of newsletters into Slack, Sheets or a feed reader.
• AI and RAG pipelines: clean full text of free posts with dates and authors.
• Media and market research: track how a newsletter's engagement changes over time.

Ready-made tasks (one click to run)

• Compare Substack newsletters: likes, comments, paywall
• Get new posts from Substack newsletters (monitoring)
• Export a Substack newsletter's posts with full text

Input

Field	What it does
publications	Names, handles or URLs (custom domains work).
maxPostsPerPublication	Newest first. Default 50.
searchQuery	Optional. Only posts matching this text.
dateFrom	Optional YYYY-MM-DD. Paging stops here.
includeContent	Full text of free posts (contentHtml, contentText).
onlyNewPosts	Monitoring: skip posts seen in earlier runs.

{
  "publications": ["astralcodexten", "https://www.lennysnewsletter.com"],
  "maxPostsPerPublication": 40
}

Output

One row per post (a real result from 2026-10-04):

{
  "publication": "www.lennysnewsletter.com",
  "postId": 216168140,
  "title": "Advanced evals: How to find (and fix) hidden AI failures in your product",
  "subtitle": "Why you should never skip error discovery",
  "url": "https://www.lennysnewsletter.com/p/advanced-evals-how-to-find-and-fix",
  "postDate": "2026-09-22T12:45:14.998Z",
  "audience": "only_paid",
  "isPaid": true,
  "type": "newsletter",
  "wordcount": 3807,
  "reactionCount": 344,
  "commentCount": 4,
  "restacks": 20,
  "authors": ["Hamel Husain", "Shreya Shankar"],
  "tags": ["AI"],
  "coverImage": "https://substackcdn.com/image/fetch/…png",
  "language": "en",
  "slug": "advanced-evals-how-to-find-and-fix"
}

With includeContent, free posts also get contentHtml and contentText.

The status message summarises each publication (real run):

Saved 80 posts from 2 publication(s). astralcodexten.substack.com: 40 posts (2026-08-03 to 2026-10-02), 3 paywalled;
top "The Foothills Of Bay Area House Party" (1164 likes, 132 comments). www.lennysnewsletter.com: 40 posts (2025-11-04 to 2026-09-29), 32 paywalled; …

Pricing (pay per event)

Event	Price
Post saved (post)	$0.0005 ($0.50 per 1,000)
Full text of a free post (post-content)	$0.0005

Failed publications are never charged. Set a maximum cost per run and the Actor stops cleanly.

Notes

• Only public data: the Actor reads Substack's public archive and post endpoints, without login. Paid posts show metadata and Substack's public preview only.
• reactionCount is the post's like count as Substack shows it.
• Comment threads and subscriber counts aren't included.

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