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Extract Emphasis as JSON - Change Watch
x402
Extract Emphasis as JSON - Change Watch is a paid API for AI agents from page.intel.rallylive.ca, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-20).
Monitors a web page's extracted emphasis elements for changes, returning current values, a changed flag, before/after diffs, and last-seen timestamp.
Price / call$0.02
Success—
StatusUnknown
How this service works
Change watch for extract emphasis as json: runs the check, compares it with the result from your previous call for the same url (kept 90 days) and returns the current answer, changed true/false, the fields that changed with before/after values, and when it was last seen. Schedule it to be alerted when this changes. $0.02 per check.
Output
Returns a JSON object containing the current extracted emphasis elements from the page, a boolean 'changed' field indicating whether content differs from the previous call, an array of changed fields each with before/after values, and a timestamp of when the page was last seen. Results are compared against a stored snapshot retained for 90 days.
Example use cases
Monitor competitor pricing callouts
“Watch the emphasized text on our competitor's pricing page at https://rival.com/pricing and alert me whenever something changes — I want to see the before and after values.”
Track regulatory notice emphasis changes
“Check whether the bolded or italicized text on https://regulator.gov/notices/current has changed since the last time you looked, and tell me exactly which fields are different.”
Detect updated product feature highlights
“Is the emphasized content on https://softwarevendor.com/features different from last check? Show me the changed flag and what the before and after values were.”
Technical details
Endpoint
GEThttps://page.intel.rallylive.ca/watch/page/emphasis/json?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to detect whether the emphasized text (bold, italic, or otherwise highlighted content) on a specific web page has changed since the last check, and want structured before/after diffing without building your own comparison logic. Ideal for scheduled polling workflows where a human or agent needs to be alerted to emphasis-level content changes rather than full page diffs.
Side effects
- URL is unreachable or returns a non-200 status — extraction fails, no comparison performed
- No prior snapshot exists (first call) — 'changed' may be null or false with no before/after diff
- Snapshot older than 90 days has been purged — treated as a fresh first call
- Page returns no emphasis elements — empty result set returned
- Payment not received (x402) — request blocked before execution
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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