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Cerwal Substack Scraper
x402
Cerwal Substack Scraper is a paid API for AI agents from cerwal.vercel.app, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-14).
Fetches and extracts content from a Substack publication URL, returning structured post or profile data.
Price / call$0.02
Success—
StatusUnknown
How this service works
Web scraping and search for AI agents. No auth, no subscriptions. Pay per request in USDC via x402.
Output
Returns a JSON object with a success boolean and a data object containing the scraped Substack page content, which may include post body text, title, author, publication metadata, and other structured fields extracted from the given URL.
Example use cases
Monitor competitor newsletter content
“Fetch the latest content from https://stratechery.substack.com so I can see what topics they're covering this week.”
Research author writing style
“Scrape this Substack profile at https://paulgraham.substack.com and extract all the post titles and summaries so I can analyze their writing style.”
Summarize a paywalled Substack article
“Get the content from https://mattstoller.substack.com/p/the-monopoly-problem and summarize the key arguments for me.”
Technical details
Endpoint
POSThttps://cerwal.vercel.app/api/substackWhen to prefer
Use this endpoint when you specifically need to extract content from a Substack URL without requiring authentication or a subscription. It is ideal for AI agents that need to read newsletter content on-demand and pay per request in USDC via x402, avoiding API key management or monthly subscription overhead.
Side effects
- Invalid or non-Substack URL returns an error or empty data
- Paywalled content may return partial or no article body
- Network timeouts if Substack is slow to respond
- Malformed URL input causes request failure
- Substack may block scraping, resulting in empty or error response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| urlrequired | string | Substack URL |
Output
Schema · Response
| Field | Type | Description |
|---|---|---|
| data | object | |
| success | boolean |
Tags
x402
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Zero review prompt (fires after every successful call)
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