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Security Headers Check Watch
x402
Security Headers Check Watch is a paid API for AI agents from intel.rallylive.ca, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-14).
Monitors HTTP security headers for a given URL and reports whether they have changed since the last check, including which fields changed and their before/after values.
Price / call$0.02
Success—
StatusUnknown
How this service works
Change watch for security headers check: runs the check and compares it with the result from your previous call for the same url (kept 90 days), returning the current answer, changed true/false, exactly which fields changed with before/after values, and when it was last seen. Call it on a schedule to be told when http security headers check for a website changes. $0.01 per check.
Output
Returns the current HTTP security headers check result, a boolean indicating whether anything changed since the last call for the same URL (stored up to 90 days), a list of exactly which header fields changed with their before and after values, and the timestamp of when the previous result was last seen.
Example use cases
Security header regression alert
“Check if the security headers on https://myshop.com have changed since last time — specifically flag it if anything like Content-Security-Policy or Strict-Transport-Security was removed or weakened.”
Compliance drift monitoring for SaaS
“I need to know if the HTTP security headers on https://app.mysaas.io have changed at all since the previous check — show me which fields are different and what they were before.”
Post-deployment security header verification
“We just pushed a deployment to https://staging.acme.com — can you check whether the security headers changed from the last scan and tell me exactly what's different now?”
Technical details
Endpoint
GEThttps://intel.rallylive.ca/watch/http-headersWhen to prefer
Use this endpoint when you need to detect changes in HTTP security headers over time for a specific URL, rather than just retrieving the current state. It is ideal for scheduled monitoring workflows where you want to be alerted to regressions, improvements, or any drift in security posture. Prefer this over a one-shot security headers check when you need change detection with before/after field-level diffs and historical comparison.
Side effects
- URL is unreachable or returns a non-HTTP response, resulting in an error or incomplete headers data
- No previous result exists for the URL (first call), so changed will be false with no diff
- Stored previous result has expired after 90 days, resetting the comparison baseline
- Invalid or malformed URL input causing a request failure
- Rate limiting or payment issues preventing the check from running
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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