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ipv4.fr SSL Certificate Check API
x402
ipv4.fr SSL Certificate Check API is a paid API for AI agents from ipv4.fr, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-29).
Checks the SSL/TLS certificate validity and days remaining for a given hostname
Price / call$0.003
Success—
StatusUnknown
How this service works
Fast, reliable network tools API. IP geolocation, DNS lookup, SSL check, WHOIS, email validation, port scan. Free tier available.
Output
Returns a JSON object with the queried host, a boolean indicating whether the certificate is valid, and the number of days remaining until the certificate expires.
Example use cases
Pre-launch SSL certificate check
“Before we go live, can you verify that the SSL certificate on mybusiness.com is valid and tell me how many days are left on it?”
Monitor expiring certificates
“Check whether the SSL certificate on api.acmecorp.com is still valid — I want to know if it's going to expire soon so I can renew it in time.”
Diagnose HTTPS connection error
“A user is getting a security warning when visiting checkout.mystore.io — can you check if the SSL certificate there is valid or if it's expired?”
Technical details
Endpoint
GEThttps://ipv4.fr/x402/v1/ssl/%7Bhost%7D?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a quick, cheap ($0.003 USDC) programmatic check of SSL certificate validity and expiration for any hostname, especially for monitoring pipelines, pre-deployment checks, or diagnosing HTTPS errors. It is part of a broader network tools suite (ipv4.fr) also covering DNS, WHOIS, and port scanning, making it convenient when you already use that platform.
Side effects
- Host does not exist or is unreachable — may return invalid status or error
- Self-signed or untrusted certificates may report as invalid
- Certificate already expired — days_remaining may be zero or negative
- Timeout if the host is slow to respond on port 443
- Invalid hostname format in the path parameter
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| properties | string |
Output
Schema · Response
{
"type": "json",
"example": {
"host": "example.com",
"valid": true,
"days_remaining": 120
}
}Tags
x402
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