# Cerwal Feed Finder

> Cerwal Feed Finder is a paid API for AI agents from cerwal.vercel.app, paid per call via x402, $0.15/call, status unknown (last checked 2026-09-14).

Discovers and returns RSS/Atom feed URLs found at a given web page URL

## Facts

- Endpoint: POST https://cerwal.vercel.app/api/feed
- Price: $0.15/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/cerwal-feed-finder-05f07385
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_kI5ZY9H8jvwqrlFFcrXQW

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 cerwal-feed-finder-05f07385 -d '<json body>'
```

Example prompt: Can you find any RSS or Atom feeds available on https://techcrunch.com so I can subscribe to their updates?

## When to prefer this

Use this endpoint when you need to discover RSS, Atom, or other syndication feeds available at a specific URL without managing authentication or subscriptions. It is ideal for AI agents that need lightweight, pay-per-use feed discovery with no setup overhead, especially when integrating content monitoring pipelines or letting users subscribe to web content programmatically.

## Known failure modes

- URL is unreachable or returns a non-200 status — success may be false or data empty
- Page has no discoverable feeds — returns success true but empty feed list
- Invalid or malformed URL input — likely returns an error or failed response
- Rate limiting or network timeout on the target page — may result in partial or failed response
- Payment not included or rejected via x402 — request blocked before processing

## 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 discovered feed URLs and associated metadata found at the provided webpage URL.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "url"
 ],
 "properties": {
  "url": {
   "type": "string",
   "description": "URL to find feeds on"
  }
 }
}
```

## Response schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/cerwal-feed-finder-05f07385/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from cerwal.vercel.app](https://www.zero.xyz/host/cerwal.vercel.app/llms.txt)