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page-diff-watch
x402
page-diff-watch is a paid API for AI agents from intel.rallylive.ca, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-14).
Monitors a webpage's text content and returns whether it changed since your last call, with before/after field diffs, using persistent 90-day result history.
Price / call$0.02
Success—
StatusUnknown
How this service works
Change watch for page diff: runs the check and compares it with the result from your previous call for the same url (kept 90 days), returning the current answer, changed true/false, exactly which fields changed with before/after values, and when it was last seen. Call it on a schedule to be told when page text diff against your previous call changes. $0.01 per check.
Output
Returns the current page text result, a boolean 'changed' flag indicating whether content differs from the previous call for that URL, a list of exactly which fields changed with before and after values, and a timestamp of when the page was last seen. Results are retained for 90 days per URL.
Example use cases
Track competitor pricing page updates
“Watch https://competitor.com/pricing every hour and tell me whenever the text on that page changes — I want to see exactly which parts changed, with the before and after content.”
Monitor government policy page for amendments
“Keep checking https://gov-site.example.gov/policy for any text changes and alert me when something differs from the last time you checked, including what specifically changed.”
Detect product availability changes on a retailer site
“Poll https://shop.example.com/products/limited-edition for text changes and let me know immediately when the page content is different from your previous check — show me what changed.”
Technical details
Endpoint
GEThttps://intel.rallylive.ca/watch/page/text-diffWhen to prefer
Choose this endpoint when you need persistent, stateful change detection for a webpage's text content across multiple calls over time — especially when you want to know exactly which fields changed and their before/after values without managing your own storage. Ideal for scheduled agent workflows that need to track page updates without maintaining a separate database of previous states. Prefer it over one-shot scraping tools when continuity and delta detection are the goal.
Side effects
- URL is unreachable or returns a non-200 status, resulting in an error or no diff data
- First-time call for a URL has no previous result to compare against, so 'changed' may be indeterminate
- Page uses JavaScript rendering that is not captured by a plain HTTP GET, leading to incomplete text extraction
- 90-day history expiry means old baselines are lost and change detection resets
- Rate limiting or payment failures (x402) blocking repeated polling
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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