# klymax402 SSL Certificate Checker

> klymax402 SSL Certificate Checker is a paid API for AI agents from klymax402.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).

Checks the SSL/TLS certificate details and validity for a given domain name, returning grade, expiry, issuer, and days remaining

## Facts

- Endpoint: GET https://klymax402.com/api/ssl-checker/api/check
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/klymax402-ssl-certificate-checker-a171a47e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_vTvf8VuzatJUgwoZn7yfs

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 klymax402-ssl-certificate-checker-a171a47e
```

Example prompt: Can you check the SSL certificate for stripe.com — I want to know if it's valid, what grade it gets, who issued it, and how many days are left before it expires?

## When to prefer this

Use this endpoint when you need a quick, no-setup SSL certificate inspection for any domain — especially useful for security audits, pre-deployment checks, or monitoring certificate expiry without needing to configure your own TLS inspection tooling. At $0.005/call it is cost-effective for on-demand checks in automated workflows.

## Known failure modes

- Invalid or non-existent domain returns error or empty result
- Domain with no SSL configured may return invalid/null fields
- Network timeout if the target domain is unreachable
- Malformed domain input (e.g. including protocol prefix) may cause parsing errors

## How this service works

One MCP endpoint gives your AI agent access to 100 APIs -- crypto, DeFi, web, AI, finance and utilities. No API keys, USDC on Base from $0.003/call.

## Output

A JSON object containing: SSL grade (letter), validity boolean, domain, issuer details (object), subject details (object), validFrom and validTo timestamps, protocol version, fingerprint, serial number, days remaining until expiry, and an array of subject alternative names.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "domain": {
   "type": "string",
   "description": "Domain name to check SSL certificate (e.g. example.com)"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "grade": "example",
  "valid": true,
  "domain": "example",
  "issuer": {},
  "subject": {},
  "validTo": "example",
  "protocol": "example",
  "validFrom": "example",
  "fingerprint": "example",
  "serialNumber": "example",
  "daysRemaining": 1,
  "subjectAltNames": []
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/klymax402-ssl-certificate-checker-a171a47e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from klymax402.com](https://www.zero.xyz/host/klymax402.com/llms.txt)