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Website Change Evidence
x402
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.
Price / call$0.002
Success—
StatusUnknown
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.
Example use cases
Verify regulatory page unchanged
“Fetch https://sec.gov/rules/final/2023/important-rule.htm and capture a hash and citation metadata so I can prove what it said today — also check whether the phrase 'compliance deadline' still appears on the page.”
Detect edited news article
“Read https://reuters.com/article/breaking-news-story and give me a verifiable hash and metadata snapshot — I want to know if the phrases 'initial casualty count' and 'government spokesperson' are still in the live text.”
Monitor competitor pricing page
“Grab https://competitor.com/pricing right now and record a cryptographic hash and full citation metadata, and check whether the phrase '$99 per month' is still on that page.”
Technical details
Endpoint
POSThttps://website-change-evidence.inboxtzdjqv.workers.dev/v1/web-read-evidence?utm_source=zero.xyzWhen to prefer
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.
Side effects
- 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
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| urlrequired | string | Public HTTPS URL |
| phrases | array | Optional exact phrases to check |
Tags
x402
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