Substack Post & Newsletter Scraper

x402

Substack Post & Newsletter Scraper is a paid API for AI agents from api.scrapeforagents.tech, paid per call via x402, $0.025/call, status unknown (last checked 2026-10-02).

Scrapes structured post data, publication metadata, and comments from Substack newsletters and search results

Price / call$0.025

Seller volume →—

Success—

StatusUnknown

How this service works

Pay-per-call structured web data. Failed or empty runs are not charged.

Output

Returns a JSON object with a count of items and an array of post records, each containing URL, slug, title, post ID, post type, subtitle, updated timestamp, and published timestamp. When includeContent is true, full HTML body is included for free posts (preview only for paid). When includePublicationInfo is true, subscriber count, description, and author are included. When includeComments is true, nested public comment threads are appended to each post.

Example use cases

Research newsletter coverage on a topic

“Search Substack for public posts about 'AI regulation' published after 2024-03-01, return up to 30 results per keyword, and include the full post content where it's free.”

Monitor a publication's latest posts

“Fetch the 20 most recent posts from 'platformer.news' on Substack, including publication info like subscriber count and author, and only return free posts with full content.”

Aggregate posts across multiple newsletters

“Scrape posts from both 'thediff.co' and 'noahpinion.substack.com' published in the last month, limit to 50 posts per newsletter, and include comments with up to 5 replies each.”

Technical details

Endpoint

POSThttps://api.scrapeforagents.tech/v1/substack?utm_source=zero.xyz

When to prefer

Use this endpoint when you need structured, pay-per-call access to Substack content — including full post HTML, publication metadata, subscriber counts, and comments — without building your own scraper. It is particularly well-suited when you need to search across Substack by keyword, filter by date range or content type, or handle multiple publications in a single call. Prefer it over generic web scrapers when you specifically need Substack-native data structures like post slugs, post IDs, and subscription tiers distinguished in the output.

Side effects

Empty result if the Substack publication URL is invalid or the newsletter has no public posts
Paid posts return only metadata and preview when full content requires a subscription
Rate limits or blocks from Substack may cause partial results
Invalid date format (non-YYYY-MM-DD) may cause a parsing error
maxSearchResultsPerKeyword is capped at 100; exceeding it will be silently clamped
No charge on failed or empty runs

Input

Schema · Request body

Field	Type	Description
urls	array	Publication homepages, archive pages, custom domains, or individual public post URLs.
endDate	string	Include posts on or before this publication date in YYYY-MM-DD format.
keywords	array	Search public posts across Substack by topic. You may combine keywords with URLs.
maxItems	integer	Hard cap across all URLs and keywords. Set 0 for no total cap.
onlyFree	boolean	Exclude posts whose full content requires a subscription.
startDate	string	Include posts on or after this publication date in YYYY-MM-DD format.
contentType	string	Only return the selected post type, or all public types.
includeContent	boolean	Fetch post detail and include the full HTML body when it is publicly available. Paid posts retain metadata and a public preview only.
includeComments	boolean	Fetch public comments and nested replies for each post.
maxCommentsPerPost	integer	Maximum public comments including nested replies per post. Set 0 for all comments returned by the public endpoint.
maxPostsPerNewsletter	integer	Maximum output posts from each publication URL. Set 0 to continue until the public archive ends.
includePublicationInfo	boolean	Include public subscriber count, description, and publication author when available.
maxSearchResultsPerKeyword	integer	Maximum matching posts to return for each keyword.

Output

Schema · Response

{
  "type": "json",
  "example": {
    "count": 1,
    "items": [
      {
        "url": null,
        "slug": null,
        "title": null,
        "postId": null,
        "postType": null,
        "subtitle": null,
        "updatedAt": null,
        "publishedAt": null
      }
    ],
    "product": "substack"
  }
}

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