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Extract H3 As JSON Change Watch
x402
Extract H3 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 webpage's H3 headings for changes and returns 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 h3 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 H3 headings extracted from the target page, a boolean 'changed' flag indicating whether anything differs from the cached result (stored up to 90 days), a list of fields that changed with explicit before and after values, and a timestamp of when the page state was last observed.
Example use cases
Track competitor page section changes
“Watch https://competitor.com/pricing for me and tell me if any of the H3 section headings change — I want to see exactly what the old text was versus the new text.”
Monitor news site topic headings
“Check https://news.example.com for me and let me know if the H3 headings have changed since you last looked — flag it as changed or not and show me what's different.”
Alert on product page restructuring
“I need to know if https://store.example.com/products has updated any of its H3 subheadings since our last check — pull the current ones and compare them to the previous snapshot.”
Technical details
Endpoint
GEThttps://page.intel.rallylive.ca/watch/page/h3/json?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to detect whether H3 headings on a specific webpage have changed over time, rather than just extracting the current headings. It is ideal for scheduled monitoring, alerting pipelines, and change-diff workflows where you need explicit before/after comparison rather than a raw snapshot. Use the bulk or non-watch siblings if you just need the current H3 content without change tracking.
Side effects
- No previous snapshot exists (first call returns current state with changed=false or null baseline)
- Target URL is unreachable or returns an error, resulting in a failed check
- Cached result has expired after 90 days, losing comparison baseline
- Target page requires authentication, blocking H3 extraction
- Network timeout or rate limiting on the target domain
- Payment of $0.02 USDC not fulfilled, blocking the request
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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