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Extract Buttons as JSON – Change Watch
x402
Extract Buttons 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 buttons (extracted as JSON) and returns whether they have changed since the last check, along with before/after diffs and last-seen timestamp.
Price / call$0.02
Success—
StatusUnknown
How this service works
Change watch for extract buttons 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 set of buttons extracted as JSON, a boolean 'changed' flag indicating whether buttons differ from the previous check, a list of fields that changed with before and after values, and the timestamp of when the page was last seen. Previous results are retained for 90 days for comparison.
Example use cases
Competitor pricing page button watch
“Watch the buttons on https://competitor.com/pricing and alert me if any of them change — especially if a 'Free Trial' or 'Get Started' button appears or disappears.”
E-commerce checkout button monitoring
“Monitor the checkout page at https://shop.example.com/cart for any button changes — I want to know right away if the 'Buy Now' button gets renamed or removed.”
SaaS signup flow change detection
“Set up a watch on https://app.saas.io/signup so I'm notified whenever the buttons on that page change, like if a new sign-up option gets added or the primary CTA label changes.”
Technical details
Endpoint
GEThttps://page.intel.rallylive.ca/watch/page/buttons/json?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to continuously monitor a specific webpage's buttons for any changes over time, rather than doing a one-time extraction. Ideal for automated pipelines, scheduled agents, or alerting workflows where knowing what changed (and what it looked like before) is more important than just getting the current state. Prefer this over a simple extract endpoint when diff tracking and change history matter.
Side effects
- Target URL is unreachable or returns a non-200 status — check may fail or return stale data
- No previous check stored (first call) — changed flag defaults to false with no before/after diff
- Page returns buttons dynamically via JavaScript that the fetcher cannot execute — buttons may not be detected
- 90-day retention window exceeded — previous result is lost and comparison resets
- Rate limits or payment failure ($0.02 USDC per call) — request is rejected
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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