Substack
Newsletter posts, post details and newsletter search
Substack returns public newsletters and recent public post details or text; paid posts expose previews or metadata, and some custom-domain newsletters may be unavailable.
Your information
The newsletter name or web address, for example Lenny's Newsletter or lenny.substack.com.
The maximum number of posts to return, for example 20.
Example results
- Newsletter Link
- lennysnewsletter.com
- Newsletter Name
- Lenny's Newsletter
- Posts
Posts Cover Image Link Title Likes Access Authors Post ID Subtitle Post Link Post Type Comment Count Published Date Advanced evals: How to find (and fix) hidden AI failures in your product326paidHamel Husain, Shreya Shankar216168140Why you should never skip error discoveryarticle32026-09-2260+ new creative growth ideas413paidTom Orbach214360366How to stand out when everyone is running the same playbookarticle62026-09-15How to turn your AI into a world-class designer1,054paidAnshu Chimala213056760An end-to-end process for tapping into AI’s hidden creativityarticle212026-09-01
About Substack
Substack searches public newsletters by topic, returning names, authors, descriptions, links, and displayed subscriber counts; it needs a topic.
List newsletter posts returns recent public post details for a newsletter; it needs a name or web address.
Read post returns public text and post details; it needs a post link.
Built by Fous from substack.com, johnmaartifacts.substack.com, msolney.substack.com and on.substack.com and checked automatically; it last passed a check on Sep 29, 2026. Fous is not affiliated with Substack.
Actions
Read post
1 credit per runRead the text and details of a public Substack post from its link. Paid posts show only the public preview; word count may describe the whole post.
Uses Substack, johnmaartifacts.substack.com and msolney.substack.com.
What you provide
| Field | Type | Required | Description |
|---|---|---|---|
Postpost | Text | Required | The link to the newsletter post, for example https://www.oneusefulthing.org/p/the-twilight-of-the-chatbots.Example: https://www.oneusefulthing.org/p/the-twilight-of-the-chatbots |
What you get
| Field | Type | Description |
|---|---|---|
Likeslikes | Number | Number of likes.Example: 799 |
Titletitle | Text | Post title.Example: The twilight of the chatbots |
Accessaccess | Text | Whether the post is free or paid.Example: Free |
Authorsauthors | List | Names of the post authors. |
Subtitlesubtitle | Text | Post subtitle, if given.Example: How work changes along the exponential |
Post Linkpost_link | Text | Link to the post.Example: https://www.oneusefulthing.org/p/the-twilight-of-the-chatbots |
Paragraphsparagraphs | List | The publicly available post text, as plain-text paragraphs. |
Word Countword_count | Number | Post word count, including gated text if the post is paid.Example: 1271 |
Comment Countcomment_count | Number | Number of comments.Example: 103 |
Published Datepublished_date | Date | Date the post was published.Example: 2026-06-30 |
Newsletter Namenewsletter_name | Text | Name of the newsletter.Example: One Useful Thing |
Cover Image Linkcover_image_link | Text | Cover image link, when present.Example: https://substackcdn.com/image/fetch/$s_!CQgP!,f_auto,q_auto:good,fl_progressive… |
Full Text Availablefull_text_available | Yes or no | Whether the full post text is publicly available.Example: Yes |
Example result
For Post: https://www.oneusefulthing.org/p/the-twilight-of-the-chatbots
{
"likes": 799,
"title": "The twilight of the chatbots",
"access": "free",
"authors": [
"Ethan Mollick"
],
"subtitle": "How work changes along the exponential",
"post_link": "https://www.oneusefulthing.org/p/the-twilight-of-the-chatbots",
"paragraphs": [
"If you feel like things are accelerating in AI, you are probably right. Better AI models from the leading American AI labs have been releasing more quickly than ever (though government interventions s…",
"But it isn't just release timing. The evidence points to accelerating capability gains as well (though the frontier stays jagged, and AIs remain weak in many places). This is especially obvious when w…",
"Another organization doing similar experiments, Epoch , recently found Opus 4.7, working on its own for 14 hours, was able to build a software package that would take 2-17 weeks of human engineering w…"
],
"word_count": 1271,
"comment_count": 103,
"published_date": "2026-06-30",
"newsletter_name": "One Useful Thing",
"cover_image_link": "https://substackcdn.com/image/fetch/$s_!CQgP!,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F8215c2ac-ba16-483d-a53d-2957f2add233_1376x8…",
"full_text_available": true
}For developers
Run this workflow from your own code. In Studio, turn on Developer mode and create an API key.
# First set your key: export FOUS_API_KEY='YOUR_FOUS_API_KEY'
: "${FOUS_API_KEY:?Set FOUS_API_KEY before running this example}"
curl 'https://api.fous.com/v1/query' \
--fail-with-body --silent --show-error --max-time 120 \
-H "Authorization: Bearer $FOUS_API_KEY" \
-H 'Content-Type: application/json' \
--data-raw '{
"api": "@substack",
"visibility": "public",
"operation": "list_newsletter_posts",
"version": 1,
"input": {
"newsletter": "lennysnewsletter.com",
"max_results": 3
},
"response": {
"format": "json"
}
}'What you can do with it
- Find public newsletters about a topic
- Compare newsletter descriptions and displayed subscriber counts
- Track recent posts from selected newsletters
- Review public post text and publication details
- Identify posts with paid access
Questions
Is Fous affiliated with Substack?
No. Fous is not affiliated with Substack. This workflow reads the public substack.com website and returns its data.
How much does it cost?
Each run costs 1 credit. With pay-as-you-go, a credit costs 1¢; monthly plans cost less per credit.
Do I need a Substack account?
No. You only need a Fous account.
How current is the data?
Fous gets the data from substack.com when you run it; repeating the same request within a day may return the saved result. Fous checks this workflow automatically; it last passed a check on Sep 29, 2026.
How can I find newsletters about a topic?
Use Search newsletters with a topic to find matching public newsletters in Substack search order.
What posts has a newsletter published recently?
Use List newsletter posts with a newsletter name or web address to get recent public post details.
Can I read a post's text?
Use Read post with its link to get publicly available post text and details. Paid posts show only the public preview.


