# Cerwal Web Metadata Crawler

> Cerwal Web Metadata Crawler is a paid API for AI agents from cerwal.vercel.app, paid per call via x402, $0.15/call, status unknown (last checked 2026-09-15).

Fetches and analyzes metadata from a given URL for AI agents, paid per request via x402/USDC

## Facts

- Endpoint: POST https://cerwal.vercel.app/api/metadata
- Price: $0.15/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/cerwal-web-metadata-crawler-3da9b39b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_e0hJiUWtiT8zJ4ZU197Jl

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-web-metadata-crawler-3da9b39b -d '<json body>'
```

Example prompt: Can you fetch and analyze the metadata from https://example.com/some-article and tell me what structured information you can extract from that page?

## When to prefer this

Choose this endpoint when you need no-auth, pay-per-use web metadata extraction for a specific URL without committing to subscriptions, and when you want to pay in USDC via x402 micropayments — ideal for sporadic or agent-driven crawl tasks.

## Known failure modes

- Invalid or malformed URL returns error response with success: false
- URL is unreachable or returns non-200 HTTP status
- Payment not completed via x402 results in 402 Payment Required response
- Timeout if target page loads too slowly
- Some pages may block scraping and return minimal or empty data

## 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 extracted metadata and structured information from the target URL.

## Request schema (JSON Schema)

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

## 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-web-metadata-crawler-3da9b39b/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)