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Lookproof HSTS Header Parser
x402
Lookproof HSTS Header Parser is a paid API for AI agents from api.lookproof.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-31).
Parses a Strict-Transport-Security (HSTS) header value per RFC 6797, returning max-age, includeSubDomains, preload flags, and hstspreload.org rule compliance — offline, no DNS required.
Price / call$0.002
Success—
StatusUnknown
How this service works
Check SPF, DMARC, DKIM, MTA-STS, DNSSEC and more, with results that explain what was found and why. Free browser checks and a pay-per-request API with x402.
Output
Returns a structured breakdown of the parsed HSTS header: whether browsers would accept it, the max-age value in seconds, presence of includeSubDomains and preload directives, and which hstspreload.org header rules the header satisfies or fails. Computed offline without any DNS or network lookups.
Example use cases
Validate HSTS before preload submission
“I'm about to submit my site to the HSTS preload list — can you check whether this header value is valid and meets all the hstspreload.org rules: 'max-age=63072000; includeSubDomains; preload'?”
Debug HSTS misconfiguration
“My HSTS header is 'max-age=86400; includeSubDomains' — can you parse it and tell me whether browsers will accept it and if there are any issues, like the max-age being too short for preloading?”
Confirm HSTS setup after deployment
“We just deployed HSTS on our site. Parse this header and confirm all the fields are correct: 'max-age=31536000; includeSubDomains; preload' — I need to know the max-age, whether subdomains are covered, and if the preload flag is properly set.”
Technical details
Endpoint
POSThttps://api.lookproof.dev/v1/http/hsts-parse?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to validate or debug an HSTS header string offline — especially when setting up HSTS for the first time, preparing a site for hstspreload.org submission, or checking whether a header string meets RFC 6797 requirements without needing DNS or a live server response.
Side effects
- Empty or missing header field returns a validation error
- Header value exceeding 8192 characters is rejected
- Malformed or non-HSTS header string may return parsing errors or incomplete results
- No network access to verify live server — only the supplied string is parsed
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| header | string |
Tags
x402
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