# whatchuneed Substack Crawl

> whatchuneed Substack Crawl is a paid API for AI agents from whatchuneed.vercel.app, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-15).

Crawls and extracts content from a Substack publication or post given a URL or query input

## Facts

- Endpoint: POST https://whatchuneed.vercel.app/api/crawl/substack
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/whatchuneed-substack-crawl-b5cace60
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_JqPpCG0ivf6JjxCs1ShcG

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 whatchuneed-substack-crawl-b5cace60 -d '<json body>'
```

Example prompt: Can you fetch and extract the full text and metadata from this Substack post at https://example.substack.com/p/my-article so I can read and summarize it?

## When to prefer this

Choose this endpoint when you need to programmatically extract content from a specific Substack publication or post and want a pay-per-call approach without managing your own scraping infrastructure. It is particularly useful when integrating Substack content into agent workflows, summaries, or research pipelines via the x402 protocol.

## Known failure modes

- Invalid or inaccessible Substack URL returns an error result
- Paywalled or subscriber-only posts may return partial or no content
- Rate limiting or Substack bot detection may cause failed crawl
- Malformed input string causes validation error
- Network timeout returns empty or null result

## How this service works

320+ pay-per-call API endpoints across accommodation, LLM, code execution, crypto, medical, finance, and more. One API, one payment. Powered by x402 protocol.

## Output

Returns a result object containing extracted Substack content such as article body text, title, author name, publication date, and other available post metadata, along with a status field indicating success or failure.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "result": {
   "type": "object",
   "description": "Response data"
  },
  "status": {
   "type": "string"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/whatchuneed-substack-crawl-b5cace60/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from whatchuneed.vercel.app](https://www.zero.xyz/host/whatchuneed.vercel.app/llms.txt)