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Extract Stylesheets as JSON – Change Watch
x402
Extract Stylesheets 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 stylesheets (as JSON) for changes, returning a diff with before/after values and a changed flag each time it is polled.
Price / call$0.02
Success—
StatusUnknown
How this service works
Change watch for extract stylesheets 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 extracted stylesheets as JSON, a boolean 'changed' flag, a list of fields that changed with their before and after values, and a timestamp of when the page was last seen. Previous results are retained for 90 days for comparison.
Example use cases
Detect unauthorized stylesheet injection
“Watch https://myshop.com for any stylesheet changes — if a new CSS file gets added or an existing one is removed, I want to know immediately so I can catch any potential malicious injection.”
Track competitor design refresh
“Check https://competitor.com right now and tell me if their stylesheets have changed since the last check — I'm trying to spot when they update their site design.”
Automated CI stylesheet regression alert
“Poll https://staging.myapp.com and let me know if the stylesheets look different from the last time you checked — I want to catch any accidental CSS regressions before we ship.”
Technical details
Endpoint
GEThttps://page.intel.rallylive.ca/watch/page/stylesheets/json?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to detect changes in a web page's stylesheets over time rather than simply extracting them once. It is ideal for scheduled monitoring, alerting pipelines, or regression detection where knowing what changed (and the before/after diff) matters more than a one-off extraction. Prefer the non-watch extract endpoint if you only need the current snapshot without change comparison.
Side effects
- Target URL is unreachable or returns an error — check may fail or return no data
- No prior result stored (first call) — 'changed' will be false or undefined as there is no baseline
- URL returns dynamic or randomized stylesheets — may produce false positives on every call
- 90-day retention window exceeded — baseline is lost and comparison resets
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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