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Sift Web Tools – Site Check
x402
Sift Web Tools – Site Check is a paid API for AI agents from sift.srv1996466.hstgr.cloud, paid per call via x402, $0.004/call, status unknown (last checked 2026-10-23).
Checks a domain's TLS certificate validity, HTTP security headers, and general site health in one call
Price / call$0.004
Success—
StatusUnknown
How this service works
Domain health: DNS, SPF/DMARC, TLS certificate expiry, security headers. One-call domain audit: A/AAAA/MX/NS/CAA records, SPF and DMARC, TLS issuer and days to expiry, redirect chain and security-header score.
Output
Returns a JSON object with TLS validity (boolean) and days remaining on the certificate, an HTTP security header score (e.g. '2/6'), and the checked domain name. Provides a quick snapshot of a site's basic security posture.
Example use cases
Pre-outreach domain security audit
“Before I send a cold email campaign to leads from acmecorp.com, can you check whether their site has a valid SSL cert and decent HTTP security headers?”
Vendor due diligence check
“We're evaluating a new SaaS vendor at vendor-xyz.io — can you quickly check their site's TLS certificate status and security header score so I can include it in our security review?”
Monitor partner site certificate expiry
“Can you check how many days are left on the TLS certificate for partner-portal.example.com? I want to know if it's about to expire so I can flag it to their team.”
Technical details
Endpoint
GEThttps://sift.srv1996466.hstgr.cloud/v1/site-check?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a quick, structured check of a domain's TLS certificate status and HTTP security headers without doing a full audit. Ideal for pre-outreach checks, vendor evaluations, or certificate expiry monitoring. Prefer it over full WHOIS or crawl endpoints when you only need security posture signals.
Side effects
- Invalid or non-existent domain returns an error or empty result
- Domain with no HTTP server returns connection failure
- Payment not processed (non-200) means no charge but also no result
- Rate limiting or network timeouts on slow-responding domains
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"tls": {
"valid": true,
"days_left": 80
},
"http": {
"security_header_score": "2/6"
},
"domain": "example.com"
}
}Tags
x402
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