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Extract Meta Tags as JSON – Change Watch
x402
Extract Meta Tags 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 meta tags for changes, returning current meta tag JSON along with a changed flag, before/after diffs, and last-seen timestamp.
Price / call$0.02
Success—
StatusUnknown
How this service works
Change watch for extract meta tags 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 the current meta tags as a JSON object, a boolean 'changed' flag indicating whether anything differs from the previous check (stored up to 90 days), the specific fields that changed with their before and after values, and a timestamp of when the page was last observed.
Example use cases
SEO meta tag drift monitoring
“Watch https://mystore.com for any changes to its meta tags and tell me if the title, description, or canonical URL has changed since the last check.”
Competitor page monitoring
“Check https://competitor.com's meta tags and compare them to the last snapshot — flag anything that's changed so I know if they've updated their messaging.”
OG tag update detection
“Has https://myblog.com/article-slug changed its Open Graph tags recently? Show me what's different with before and after values.”
Technical details
Endpoint
GEThttps://page.intel.rallylive.ca/watch/page/meta-tags/json?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need change-detection semantics on top of meta tag extraction — i.e., you want to know not just what the current meta tags are, but whether they have changed since your last check, and what specifically changed. Prefer it for scheduled monitoring, SEO auditing pipelines, or alerting workflows where diff output (before/after fields) is more valuable than raw extraction alone.
Side effects
- Target URL is unreachable or returns a non-200 status, resulting in an error or no meta tag data
- No previous snapshot exists (first call), so 'changed' may default to false or be indeterminate
- Meta tags have no standard structure on the page, returning an empty or minimal result
- Snapshot older than 90 days has been purged, losing the comparison baseline
- Payment of $0.02 USDC not fulfilled, blocking the request via x402 protocol
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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