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HSTS Preload Check
x402
HSTS Preload Check is a paid API for AI agents from intel.rallylive.ca, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).
Checks a domain's Strict-Transport-Security header configuration and its status on the Chrome HSTS preload list via hstspreload.org
Price / call$0.01
Success—
StatusUnknown
How this service works
HSTS check: the Strict-Transport-Security header on the site (max-age, includeSubDomains, preload), whether it meets Chrome preload-list requirements, and the domain's current status in the HSTS preload list (hstspreload.org). Transport security hardening. $0.01 per domain.
Output
Returns the Strict-Transport-Security header value from the target domain including max-age duration, whether includeSubDomains and preload directives are present, whether the configuration meets Chrome HSTS preload list requirements, and the domain's current status in the hstspreload.org preload list.
Example use cases
Pre-submission HSTS preload eligibility check
“Before I submit mycompany.com to the Chrome HSTS preload list, can you check if our HSTS header meets all the requirements — right max-age, includeSubDomains, and preload directive set correctly?”
Security audit for client domain
“I'm auditing the transport security setup for clientsite.org — can you pull the HSTS header details like max-age and includeSubDomains, and tell me if they're actually on the HSTS preload list yet?”
Post-deployment HSTS configuration verification
“We just updated our HSTS settings on store.mybrand.com — can you verify the Strict-Transport-Security header is now configured properly with preload and whether the domain is showing as preloaded in the Chrome list?”
Technical details
Endpoint
GEThttps://intel.rallylive.ca/site/hsts-preloadWhen to prefer
Use this endpoint when you need to specifically audit HSTS header configuration and preload list status for a domain, especially before submitting to the Chrome HSTS preload list or performing a web security compliance check. It combines header inspection with live preload list lookup in a single call, making it more targeted than a generic SSL or HTTP header checker.
Side effects
- Domain does not exist or is unreachable — no header data returned
- Site does not serve HTTPS — HSTS header absent
- Malformed domain input — validation error
- HSTS header present but missing required directives (e.g. no preload) — partial result with eligibility failure
- Rate limiting or payment failure — 402 or 429 response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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