# Syntexa AgentShelf SSL Certificate Checker

> Syntexa AgentShelf SSL Certificate Checker is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.004/call, status unknown (last checked 2026-10-02).

Fetches and summarizes the TLS/SSL certificate details for a given public hostname or URL, blocking private IPs.

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/ssl-check?utm_source=zero.xyz
- Price: $0.004/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/syntexa-agentshelf-ssl-certificate-checker-e204e4fe
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_G4m_h_WppJ8omCdJ375sK

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 syntexa-agentshelf-ssl-certificate-checker-e204e4fe -d '<json body>'
```

Example prompt: Can you pull the TLS certificate summary for github.com and tell me who issued it, when it expires, and whether it's currently valid?

## When to prefer this

Choose this endpoint when an AI agent needs to programmatically retrieve and inspect TLS certificate metadata for a public hostname or URL without writing custom network code. It is particularly useful for security audits, expiry monitoring, and HTTPS diagnostics on public-facing infrastructure. Prefer the free sandbox endpoint (/v1/sandbox/ssl-check) for testing; use this paid endpoint ($0.004 USDC) for production use cases where reliability and consistent uptime matter.

## Known failure modes

- Private or reserved IP addresses are blocked and will return an error
- Invalid or malformed hostnames/URLs return a validation error
- Hosts with no TLS/no HTTPS will fail to return certificate data
- Network timeouts if the host is unreachable
- Self-signed or otherwise untrusted certs may return partial data with warnings

## How this service works

Call when an agent needs a TLS certificate summary for a public host or URL (private IPs blocked). Exact $0.004 USDC. Prefer unpaid POST /v1/sandbox/ssl-check first.

## Output

A structured summary of the TLS/SSL certificate for the queried public host or URL, including details such as the issuer, subject, subject alternative names (SANs), validity period (not-before / not-after dates), whether the certificate is currently valid, and certificate chain information.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "url": {
   "type": "string",
   "maxLength": 2048,
   "description": "Public https URL. The hostname is checked. Provide url or host."
  },
  "host": {
   "type": "string",
   "examples": [
    "example.com"
   ],
   "maxLength": 253,
   "minLength": 1,
   "description": "Public hostname such as example.com. Provide host or url. Private and metadata targets are rejected."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/syntexa-agentshelf-ssl-certificate-checker-e204e4fe/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agentshelf.syntexa.ch](https://www.zero.xyz/host/agentshelf.syntexa.ch/llms.txt)