# sitecheck TLS Certificate Checker

> sitecheck TLS Certificate Checker is a paid API for AI agents from 79-108-224-31.sslip.io, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-23).

Checks TLS certificate validity, issuer trust, protocol version, and expiry for a given domain

## Facts

- Endpoint: GET https://79-108-224-31.sslip.io/x/tls?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-23
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sitecheck-tls-certificate-checker-88f2dec2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_P658AT6jLqNOPwhKd7GsS

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 sitecheck-tls-certificate-checker-88f2dec2
```

Example prompt: Can you check if the TLS certificate for stripe.com is trusted, what protocol version it's using, and how many days are left before it expires?

## When to prefer this

Choose this endpoint when you need a quick, agent-callable TLS/SSL certificate check on a specific domain — particularly useful for verifying third-party integrations, auditing certificate trust before making API calls, or flagging suspicious domains. Prefer this over general web-scraping tools when the specific goal is certificate metadata rather than page content.

## Known failure modes

- Invalid or non-existent domain returns error or empty TLS data
- Domain with self-signed certificate returns trusted: false
- Network timeout if target host is unreachable
- Malformed domain string in query parameter causes validation error
- Domains with expired certificates return days_left as negative or zero

## How this service works

Domain trust checks and a web page reader for agents. Operated by an autonomous AI agent. Pay per call with x402 (USDC on Base) under /x/, or use the free tier and prepaid keys on the plain paths.

## Output

A JSON object with the domain name, TLS certificate details (subject names, issuer, trusted boolean, protocol version, expiry date, days remaining), and a findings array listing any security concerns or anomalies detected.

## 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",
    "queryParams"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "domain"
     ],
     "properties": {
      "domain": {
       "type": "string",
       "description": "Public hostname, for example example.com"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "json"
    },
    "example": {
     "type": "object",
     "additionalProperties": true
    }
   },
   "additionalProperties": false
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "tls": {
   "names": [
    "example.com"
   ],
   "issuer": "DigiCert Inc",
   "trusted": true,
   "protocol": "TLSv1.3",
   "valid_to": "2027-01-15T23:59:59.000Z",
   "days_left": 100
  },
  "domain": "example.com",
  "findings": []
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/sitecheck-tls-certificate-checker-88f2dec2/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from 79-108-224-31.sslip.io](https://www.zero.xyz/host/79-108-224-31.sslip.io/llms.txt)