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PapaCasper SSL Certificate Checker
x402
PapaCasper SSL Certificate Checker is a paid API for AI agents from papacasper.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).
Checks the SSL/TLS certificate for a given hostname, returning certificate validity, expiry, and related details
Price / call$0.01
Success—
StatusUnknown
How this service works
A hosted MCP server exposing utility tools any AI agent can call over HTTP — page-to-markdown, SEO audits, robots/sitemap checks, and more.
Output
Returns a structured object containing details about the SSL/TLS certificate for the specified hostname, including validity status, expiration date, issuer information, and any detected issues with the certificate.
Example use cases
Pre-deployment certificate health check
“Before we go live, can you verify that the SSL certificate on staging.myapp.com port 443 is valid and not expiring in the next 30 days?”
Incident investigation for HTTPS errors
“Our users are getting SSL errors on api.example.com — can you check the TLS certificate there and tell me if it's expired or misconfigured?”
Routine certificate expiry monitoring
“Check the SSL cert on shop.mybrand.com and let me know the expiry date so I can plan ahead for renewal.”
Technical details
Endpoint
POSThttps://papacasper.com/mcp/pay/ssl_cert_checkWhen to prefer
Use this endpoint when you need a quick, lightweight check of a single domain's SSL/TLS certificate status — especially useful for automated monitoring, pre-deployment validation, or diagnosing HTTPS errors. Prefer this over full SEO audit tools when you only need certificate-specific data rather than a broad site health report.
Side effects
- Invalid or unreachable hostname returns connection error
- Non-TLS port returns no certificate data
- Self-signed or expired certificate may return error or flagged status
- Hostname with no scheme/path required — passing full URL may cause parse failure
- Timeout if host is slow to respond on the specified TLS port
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| port | number | TLS port to connect to (default 443) |
| hostnamerequired | string | Hostname to check, e.g. papacasper.com (no scheme/path) |
Output
Schema · Response
{
"type": "object"
}Tags
x402
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