# Crawl Compare - Side-by-Side URL Content Comparison

> Crawl Compare - Side-by-Side URL Content Comparison is a paid API for AI agents from crawol.vercel.app, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-14).

Fetches and compares the content of two URLs side-by-side, returning a structured diff or comparison of the scraped web pages

## Facts

- Endpoint: POST https://crawol.vercel.app/api/compare
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/crawl-compare-side-by-side-url-content-comparison-3b0f5885
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_jvkTr-o7exmIZPXj-XNtt

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 crawl-compare-side-by-side-url-content-comparison-3b0f5885 -d '<json body>'
```

Example prompt: Can you compare the content of these two pages for me — https://example.com/product-old and https://example.com/product-new — and tell me what's different between them?

## When to prefer this

Use this endpoint when you need to compare the scraped content of exactly two URLs without setting up authentication or subscriptions — ideal for quick competitive analysis, content diffing, or checking how two pages differ. Costs $0.05 USDC per call via x402, making it suitable for on-demand agent workflows.

## Known failure modes

- One or both URLs are unreachable or return non-200 status
- URLs point to non-HTML content (PDFs, binary files) that cannot be scraped
- Rate limiting or bot protection on target pages blocks scraping
- Payment of $0.05 USDC via x402 fails or is rejected
- Invalid URL format provided for urlA or urlB
- Target page requires authentication or JavaScript rendering not supported

## 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 comparison results between the two scraped URLs, likely including content differences, similarities, or structured extracted data from each page.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "urlA",
  "urlB"
 ],
 "properties": {
  "urlA": {
   "type": "string",
   "description": "First URL"
  },
  "urlB": {
   "type": "string",
   "description": "Second URL"
  }
 }
}
```

## 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/crawl-compare-side-by-side-url-content-comparison-3b0f5885/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from crawol.vercel.app](https://www.zero.xyz/host/crawol.vercel.app/llms.txt)