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agentsvc.io SSL Certificate Checker
x402
agentsvc.io SSL Certificate Checker is a paid API for AI agents from agentsvc.io, paid per call via x402, $0.009/call, status unknown (last checked 2026-10-10).
Checks the SSL/TLS certificate details for a given domain, returning validity, issuer, expiry, protocol, and fingerprint information.
Price / call$0.009
Success—
StatusUnknown
How this service works
86 APIs for AI agents: web scraping and crawling to Markdown, AI summaries, data extraction and cited answers, screenshots and PDF, PDF, OCR and document conversion, news, paper and developer search and more, paid per call with USDC on Base, Solana, Polygon or Arbitrum via x402. No account, no API key, free sample on every service.
Output
Returns a JSON object with the domain, port, whether the certificate is currently valid, the issuer organization, subject CN, TLS protocol version, valid-from and valid-to timestamps, days remaining until expiry, serial number, subject alternative names (SANs), and SHA-256 fingerprint.
Example use cases
Pre-launch SSL validation check
“Before we go live, can you verify that the SSL certificate on shop.mycompany.com is valid, who issued it, and confirm it won't expire for at least the next 90 days?”
Incident triage for HTTPS errors
“We're getting SSL errors on our staging server at staging.internal.io on port 8443 — can you check the certificate there and tell me if it's expired or misconfigured?”
Third-party vendor certificate audit
“I need to check the SSL certificate on payments.vendorsite.com — is it valid, what TLS version are they using, and what's the SHA-256 fingerprint?”
Technical details
Endpoint
POSThttps://agentsvc.io/api/v1/proxy/ssl-check?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a quick, per-call SSL certificate inspection without setting up infrastructure. Ideal for one-off checks, agent-driven monitoring workflows, or when you need structured certificate metadata (expiry, issuer, SAN, fingerprint) rather than a raw TLS handshake. Preferred over manual openssl commands or browser inspection when results must be parsed programmatically by an agent.
Side effects
- Domain not found or DNS resolution fails — returns an error object
- Connection refused on specified port — returns connection error
- Certificate chain is broken or self-signed — may still return data but valid:false
- Timeout if the remote server is slow to respond
- Invalid domain format (e.g. includes 'https://') — returns validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| port | integer | Port to check (default: 443) |
| domain | string | Domain to check SSL for (e.g. 'github.com', 'api.example.com'). Do not include https:// |
Output
Schema · Response
{
"type": "json",
"example": {
"data": {
"port": 443,
"valid": true,
"domain": "github.com",
"issuer": "DigiCert Inc",
"subject": "CN=github.com",
"protocol": "TLSv1.3",
"valid_to": "2025-03-07T23:59:59.000Z",
"valid_from": "2024-03-07T00:00:00.000Z",
"serial_number": "0a:bc:12:...",
"days_remaining": 156,
"subject_alt_names": [
"github.com",
"www.github.com"
],
"fingerprint_sha256": "AB:CD:EF:..."
},
"success": true
}
}Tags
x402
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