Substack Analytics and Archive API (Benchmarks)
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from $2.00 / 1,000 results
Substack Analytics and Archive API (Benchmarks)
Any Substack publication's full post archive plus publication-level benchmark analytics - paid/free ratio, posting cadence, average reactions per post. Size a newsletter before a sponsorship, or track competitors. No login, public data, pay per record.
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from $2.00 / 1,000 results
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Bryan
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Newsletter Data — Substack Publication Archive + Benchmark Analytics
Substack has no usable public API for cross-publication data, and the free scrapers break constantly. This Actor is the reliable one: point it at any public Substack publication and get back the full post archive plus the publication-level benchmark analytics that competitive-intel teams actually pay for. Public, logged-out, read-only data only — no login, no auth-walled scraping.
What you get
Per post (one dataset row each):
| field | example |
|---|---|
title | Your Book Review: The Origins Of Woke |
slug / url | https://www.astralcodexten.com/p/your-book-review-... |
post_date | 2026-06-18T14:02:11.000Z |
is_paid / audience | false / everyone |
type | newsletter / podcast / thread |
reactions / comments | 265 / 9 |
wordcount | 4820 |
Per publication (the OUTPUT record + attached to every row):
| metric | meaning |
|---|---|
paid_ratio | share of recent posts behind the paywall |
free_posts / paid_posts | counts |
avg_reactions_per_post | engagement benchmark |
total_comments | discussion volume |
posts_per_week_est | publishing cadence |
Who uses this
- Media analysts & competitive-intel — benchmark a rival newsletter's cadence, paywall mix, and engagement without a login.
- Ad-buyers & sponsorship teams — size a publication's output and audience response before committing spend.
- VCs & creator-economy researchers — track newsletter growth signals and paid-conversion posture across a portfolio.
- AI / research corpora — clean, structured post metadata for any public Substack.
Input
url accepts a handle (lennysnewsletter.com) or a full URL. limit caps how many recent posts to pull.
Output
- Dataset: one row per post (fields above) with
publication+analyticsattached for easy joins. - Key-value store
OUTPUT: the publication summary + benchmark analytics.
Source & legality
Data comes from Substack's own public archive endpoint (/api/v1/archive), accessed logged-out. Only
public, read-only data is returned — nothing behind a paywall or login. Update cadence follows the
publication's own posting.
