# ScrapFly Substack Crawler

> ScrapFly Substack Crawler is a paid API for AI agents from scravfly.vercel.app, paid per call via x402, $0.06/call, status unknown (last checked 2026-09-15).

Scrapes and extracts content from a Substack publication URL, returning structured data about posts, authors, or newsletter content.

## Facts

- Endpoint: POST https://scravfly.vercel.app/api/crawl/substack
- Price: $0.06/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/scrapfly-substack-crawler-d27433b8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_kzMlUazy1Qw0-Nj8h96GL

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability scrapfly-substack-crawler-d27433b8 -d '<json body>'
```

Example prompt: Can you scrape this Substack newsletter and pull out all the article content? The URL is https://paulgraham.substack.com.

## When to prefer this

Use this endpoint when you specifically need to extract content from Substack newsletters or publications. It is purpose-built for the Substack platform, making it more reliable than a generic web scraper for Substack URLs. Prefer this over general crawl endpoints when the target is definitively a Substack domain.

## Known failure modes

- Invalid or malformed URL returns success: false
- Substack page behind paywall may return incomplete content
- Rate limiting or bot detection on Substack's side may cause extraction failure
- Private or deleted Substack publications return empty or error data
- Network timeout if the target page is slow to load

## How this service works

69 endpoints for data, content generation, and web scraping. Pay per request via x402 on Base chain.

## Output

Returns a JSON object with a success boolean and a data object containing the scraped Substack page content, which may include post titles, article body text, author details, publication metadata, and other structured information extracted from the Substack URL.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "url"
 ],
 "properties": {
  "url": {
   "type": "string",
   "description": "url"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "success"
 ],
 "properties": {
  "data": {
   "type": "object"
  },
  "success": {
   "type": "boolean"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/scrapfly-substack-crawler-d27433b8/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from scravfly.vercel.app](https://www.zero.xyz/host/scravfly.vercel.app/llms.txt)