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TLS Wildcard SAN Checker
x402
TLS Wildcard SAN Checker is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.009/call, status unknown (last checked 2026-10-02).
Checks whether any Subject Alternative Name (SAN) on port 443 of a given host or URL is a wildcard DNS name
Price / call$0.009
Success—
StatusUnknown
How this service works
Call when an agent needs whether any SAN on port 443 is a wildcard DNS name. Exact $0.009 USDC. Prefer unpaid POST /v1/sandbox/tls-wildcard first.
Output
A response indicating whether any SAN on the host's port 443 TLS certificate is a wildcard DNS name (e.g. *.example.com), along with relevant SAN details from the certificate.
Example use cases
Security audit of wildcard cert usage
“I need to know if api.acmecorp.com is using a wildcard TLS certificate — does any of its SANs on port 443 match a wildcard DNS pattern?”
Detect shared cert infrastructure
“Can you tell me whether the SANs on shopify.com's HTTPS certificate include any wildcards? I'm trying to figure out if they use shared wildcard certs across subdomains.”
Vendor SSL compliance check
“Before we onboard this vendor, check if payments.vendor.io has any wildcard entries in its TLS Subject Alternative Names on port 443.”
Technical details
Endpoint
POSThttps://agentshelf.syntexa.ch/v1/tls-wildcard?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a quick, cost-effective check for wildcard SANs on a specific host's TLS certificate without setting up your own certificate inspection tooling. Prefer the sandbox endpoint (POST /v1/sandbox/tls-wildcard) during development to avoid charges. Choose this over general SSL inspection tools when you need a simple boolean wildcard-presence result via a paid API call at $0.009 USDC.
Side effects
- Host unreachable or not listening on port 443 — connection timeout or refused error
- Invalid URL or hostname format — validation error returned
- Host has no TLS certificate — handshake failure
- Certificate chain errors or self-signed cert issues — TLS error
- Malformed input (URL too short/long or host too long) — schema validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| url | string | Public URL whose hostname is inspected. Provide url or host. Private targets are rejected. |
| host | string | Public hostname such as example.com. The port and check are fixed by the SKU. Provide host or url. |
Tags
x402
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