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extract-h1-as-json-watch
x402
extract-h1-as-json-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 H1 headings for changes and returns current values, change status, before/after diffs, and last-seen timestamp
Price / call$0.02
Success—
StatusUnknown
How this service works
Change watch for extract h1 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 H1 headings extracted from the target page, a boolean 'changed' field indicating whether the content differs from the previous call (retained for 90 days), a list of changed fields with before and after values, and a timestamp of when the page was last seen in its previous state.
Example use cases
Competitor landing page headline tracking
“Watch https://competitor.com for me and let me know if their main headline has changed since last time — show me the old and new H1 text side by side.”
SEO title change alert for own site
“Check if the H1 on our homepage https://mysite.com has changed from what it was before, and tell me when it was last seen unchanged.”
News site headline monitoring
“Monitor https://techcrunch.com and tell me whether the top H1 heading has changed since you last checked it, and if so, what it changed from and to.”
Technical details
Endpoint
GEThttps://page.intel.rallylive.ca/watch/page/h1/json?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to continuously monitor a specific web page's H1 headings and detect when they change over time, with automatic diffing against a stored 90-day snapshot. It is ideal for scheduled polling workflows, competitive intelligence, SEO audits, or content change alerts where you want before/after context without managing your own storage. Prefer it over a plain H1 extraction endpoint when change detection and historical comparison are required, not just current-state retrieval.
Side effects
- Target URL is unreachable or returns a non-200 status — extraction fails with an error
- No previous snapshot exists (first call) — changed is false or indeterminate with no before value
- Page has no H1 elements — returns an empty array with changed based on prior empty state
- 90-day snapshot expiry — prior comparison data lost, treated as a fresh baseline
- Rate limiting or payment failure — request rejected before extraction occurs
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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