# SSL Certificate Expiry Checker

> SSL Certificate Expiry Checker is a paid API for AI agents from intel.rallylive.ca, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-13).

Checks SSL/TLS certificate details and expiry for a hostname, including issuer, SANs, validity dates, days until expiry, and whether the site responds over HTTPS.

## Facts

- Endpoint: GET https://intel.rallylive.ca/ssl-expiry
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/ssl-certificate-expiry-checker-6161e5fa
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_nucR9jllEh2QGJvqcPup0

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability ssl-certificate-expiry-checker-6161e5fa
```

Example prompt: Can you check the SSL certificate for api.example.com and tell me how many days until it expires, who issued it, and whether the site is currently reachable over HTTPS?

## When to prefer this

Choose this endpoint when you need detailed SSL/TLS certificate metadata — expiry dates, issuer, SANs, and HTTPS availability — for a single hostname. Prefer it over generic uptime checkers when certificate-specific data is required. Use it for proactive expiry monitoring, pre-deployment validation, or auditing third-party domains. For combined uptime and SSL summary without deep certificate detail, the sibling site-uptime-and-ssl endpoint may suffice.

## Known failure modes

- Hostname not found or DNS resolution fails — returns error indicating unreachable host
- Site does not serve HTTPS at all — HTTPS availability flag set to false, certificate fields may be empty
- Certificate already expired — days-until-expiry will be negative, valid-now flag false
- Self-signed or private CA certificate may not appear in certificate-transparency logs
- Malformed hostname input — returns validation error
- Timeout if the host is slow to respond over TLS

## How this service works

SSL/TLS certificate expiry check for a hostname: issuer, common name, SANs, valid-from and valid-to dates, days until expiry and whether it is valid now, from public certificate-transparency logs, plus whether the site currently answers over HTTPS. Certificate expiry monitoring and alerts. $0.01 per host.

## Output

Returns a JSON object with the certificate issuer, common name, Subject Alternative Names (SANs), valid-from and valid-to dates, number of days until expiry, a boolean indicating whether the certificate is currently valid, and whether the site currently responds over HTTPS.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/ssl-certificate-expiry-checker-6161e5fa/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from intel.rallylive.ca](https://www.zero.xyz/host/intel.rallylive.ca/llms.txt)