# Website Change Evidence

> Website Change Evidence is a paid API for AI agents from website-change-evidence.inboxtzdjqv.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-17).

Reads a public webpage, captures citation-grade metadata and cryptographic hashes, and detects live page changes deterministically.

## Facts

- Endpoint: POST https://website-change-evidence.inboxtzdjqv.workers.dev/v1/web-read-evidence?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-17
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/website-change-evidence-7462210f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_DclddZfRgEJcyhZknv2ZK

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 website-change-evidence-7462210f -d '<json body>'
```

Example prompt: Fetch https://example.com/terms and give me a cryptographic hash and citation-grade metadata snapshot of the page right now — also check whether the phrase 'arbitration clause' still appears on it.

## When to prefer this

Choose this endpoint when you need deterministic, citation-grade evidence of a webpage's state — specifically when cryptographic hashes, auditable metadata, and phrase-level change detection are required. It is ideal for compliance, legal, journalistic, or monitoring workflows where proof-of-content matters, not just the content itself. Prefer it over generic scraping tools when you need to prove what a page said at a specific moment in time.

## Known failure modes

- URL is not publicly accessible or returns a non-200 status — endpoint cannot fetch private or auth-gated pages
- Target page uses heavy JavaScript rendering — static fetch may miss dynamically loaded content
- Rate limiting or bot-blocking by the target server — fetch may fail or return a CAPTCHA page
- Invalid or malformed URL input — returns validation error
- Network timeout if the target page is slow to respond

## How this service works

Read public webpages, capture citation-grade metadata and hashes, and detect live page changes deterministically.

## Output

Returns citation-grade metadata (title, URL, fetch timestamp, HTTP headers), a cryptographic hash of the page content, the raw or extracted page text, and a boolean/diff result indicating whether specified phrases are present or whether the page has changed from a previous hash.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "url"
 ],
 "properties": {
  "url": {
   "type": "string",
   "description": "Public HTTPS URL"
  },
  "phrases": {
   "type": "array",
   "description": "Optional exact phrases to check"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/website-change-evidence-7462210f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from website-change-evidence.inboxtzdjqv.workers.dev](https://www.zero.xyz/host/website-change-evidence.inboxtzdjqv.workers.dev/llms.txt)