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Mat Web & Data Toolkit – SSL Certificate Checker
x402
Mat Web & Data Toolkit – SSL Certificate Checker is a paid API for AI agents from automatom.matt-d59.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-18).
Fetches and returns SSL/TLS certificate details for a given hostname, including validity dates, issuer, SANs, and days remaining.
Price / call$0.01
Success—
StatusUnknown
How this service works
Fetches a public web page and returns its title, meta description, outbound links and readable plain text as JSON.
Output
A JSON object containing: the hostname, the certificate issuer (C, O, CN), subject CN, Subject Alternative Names (SANs), serial number, valid_from and valid_to timestamps, days_left until expiry, a boolean authorized flag, the crt.sh certificate transparency ID, and a source description. An error field is present if the check failed.
Example use cases
Pre-deployment HTTPS verification
“Before we go live, check the SSL certificate for api.mycompany.com — I want to confirm it's valid, who issued it, and that it covers the right domains.”
Certificate expiry monitoring alert
“Check the SSL cert for shop.example.com and tell me how many days are left before it expires — I need to know if we're at risk of it expiring soon.”
Security audit of third-party vendor
“Run an SSL check on payments.vendorsite.com for me — I want to see the issuer, validity window, and whether the certificate is currently authorized.”
Technical details
Endpoint
GEThttps://automatom.matt-d59.workers.dev/ssl?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need live SSL/TLS certificate metadata for a specific hostname, including expiry details and certificate transparency records. Prefer it over generic WHOIS or DNS tools when the specific question is about HTTPS certificate validity, issuer trust, or SAN coverage rather than domain registration or DNS records.
Side effects
- Host not found or unreachable — error field populated, authorized: false
- Domain has no HTTPS/TLS — connection refused or timeout
- Invalid hostname format in query parameter — likely returns an error JSON
- Certificate transparency lookup failure (crt.sh unavailable) — partial data may be returned
- Expired certificate — authorized may be false with negative days_left
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"san": [
"*.example.com",
"example.com"
],
"host": "example.com",
"error": null,
"issuer": {
"C": "US",
"O": "SSL Corporation",
"CN": "Cloudflare TLS Issuing ECC CA 3"
},
"serial": "01eee6aabb521d5e14fc315fd9985690",
"source": "live HTTPS check + crt.sh certificate transparency",
"subject": {
"CN": "example.com"
},
"crtsh_id": 29581277802,
"valid_to": "2026-12-25T22:56:35.000Z",
"days_left": 69,
"authorized": true,
"valid_from": "2026-09-26T22:49:11.000Z"
}
}Tags
x402
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