# SSL Certificate Checker

> SSL Certificate Checker is a paid API for AI agents from minty-sprout.onrender.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-11-01).

Checks an SSL certificate for a given domain, returning validity, issuer, expiry date, days remaining, SANs, cipher, and TLS version.

## Facts

- Endpoint: POST https://minty-sprout.onrender.com/v1/ssl-cert?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-11-01
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/ssl-certificate-checker-3893fc98
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_M1n54gB-ebHUSiDVQbutN

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-checker-3893fc98 -d '<json body>'
```

Example prompt: Can you check the SSL certificate for stripe.com — is it valid, who issued it, when does it expire, and what TLS version is it using?

## When to prefer this

Use this endpoint when you need a quick, structured summary of an SSL certificate — including expiry, issuer, SANs, and TLS version — for a single domain. Prefer it over manual browser inspection or general DNS tools when an agent needs machine-readable certificate metadata for monitoring, compliance checks, or security audits.

## Known failure modes

- Invalid or non-existent domain returns an error or empty result
- Domain has no SSL certificate (HTTP-only) may return an error
- Network timeout if the target domain is unreachable
- Malformed domain string causes a validation error
- Wildcard or multi-level subdomain resolution may differ from root domain

## How this service works

SSL certificate check: validity, issuer, expiry date and days left, SANs and TLS version. Input: a domain.

## Output

A JSON object containing: host, valid (boolean), issuer, subject, expiry timestamp, not_before date, days_left (integer), SANs array, TLS version string, and cipher suite name.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "input": {
   "type": "string",
   "maxLength": 8000,
   "description": "A domain"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "san": [
   "coinbase.com",
   "*.cdp.coinbase.com"
  ],
  "host": "coinbase.com",
  "valid": true,
  "cipher": "TLS_AES_256_GCM_SHA384",
  "issuer": "Google Trust Services",
  "expires": "2026-12-20T02:34:19+00:00",
  "subject": "coinbase.com",
  "days_left": 49,
  "not_before": "Sep 21 01:34:31 2026 GMT",
  "tls_version": "TLSv1.3"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/ssl-certificate-checker-3893fc98/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from minty-sprout.onrender.com](https://www.zero.xyz/host/minty-sprout.onrender.com/llms.txt)