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HSTS Policy Check
x402
HSTS Policy Check is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).
Validates an HTTP Strict-Transport-Security header value against caller-specified minimum max-age and subdomain inclusion requirements, returning a deterministic pass/advisory result.
Price / call$0.001
Success—
StatusUnknown
How this service works
HSTS Policy Check: HSTS Policy Check checks HSTS max-age and subdomain directives against caller policy from bounded caller-supplied values without an external provider. Call HSTS Policy Check before accepting, caching, redirecting, or retrying a caller-supplied web response. Returns normalized web evidence, the computed finding, and an explicit pass or advisory status for HSTS Policy Check as versioned deterministic JSON. Price: $0.001 USDC via x402 on Base. First-party, stateless, memory-only…
Output
Returns a versioned deterministic JSON object containing: normalized evidence parsed from the HSTS header (max-age value, subdomain flag), the computed policy finding, and an explicit pass or advisory status indicating whether the header meets the caller-supplied requirements.
Example use cases
Security preflight before caching response
“Before I cache this web response, check its HSTS header 'max-age=86400' against my policy of at least 31536000 seconds and subdomains required — does it pass?”
Redirect safety check for agent pipeline
“I'm about to follow a redirect from an external URL. Validate its HSTS header 'max-age=63072000; includeSubDomains; preload' with a minimum of 15552000 seconds and subdomain requirement on, so I know it's safe.”
Compliance audit of vendor API endpoint
“Audit this vendor's HSTS header 'max-age=0' against our policy requiring at least 31536000 seconds and subdomains enforced, and give me the finding so I can flag non-compliance.”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/hsts-policy-checkWhen to prefer
Use this endpoint when your agent pipeline needs a deterministic, stateless, policy-aware HSTS header validator without standing up custom parsing logic. Prefer it over manual regex or ad-hoc checks when you need structured findings with explicit pass/advisory status and normalized evidence, particularly as a preflight before caching, redirecting, or accepting external web responses.
Side effects
- Malformed or missing HSTS header string may result in advisory/fail status rather than an error
- minimum_seconds not supplied defaults to no minimum check, potentially bypassing intent
- require_subdomains not set defaults to false, silently skipping subdomain validation
- Header string exceeding 8192 characters will be rejected
- Payment failure via x402 prevents call from being processed
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| header | string | Header supplied to HSTS Policy Check; used only for this bounded calculation and processed in memory without retention. |
| minimum_seconds | integer | Minimum Seconds supplied to HSTS Policy Check; used only for this bounded calculation and processed in memory without retention. |
| require_subdomains | boolean | Require Subdomains supplied to HSTS Policy Check; used only for this bounded calculation and processed in memory without retention. |
Output
Schema · Response
{
"type": "json",
"example": {
"result": {
"passed": true,
"max_age_seconds": 31536000,
"include_subdomains": true
},
"schema": "delx/util-hsts-policy-check/v1",
"status": "pass",
"evidence": {
"retained": false,
"input_sha256": "f91d8b16767bb6c1225e616e67c4c99626e188225729eb1a7745334aa6398a81",
"external_calls": 0
},
"operation": "web_reliability:hsts_policy_check"
}
}Tags
x402
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